Speedometer VAZ 2115 injector does not work • AUTOVIBER.RU

When constantly using cars of the “tenth” family from AvtoVAZ, the question often arises as to why the speedometer does not work on the VAZ-2115. This sensor is vital, because not every driver has a developed sense of speed to move with a non-working device.

However, this feeling is quite well developed in security cameras that record speed limit violations on city and suburban roads. A car enthusiast can detect and fix this malfunction on his own, but this will take a little time.

Functionality check

Diagnostics of the performance of the DS can be done using 2 methods.
Option 1, to implement it you will need a multimeter:

First you need to dismantle the controller itself. Read more about the removal procedure below.
Then the tester should be set to AC voltage configuration mode.
Then you should close the multimeter probes to the contacts on the controller plug. The first probe should be connected to the contact that goes to the dashboard, it is placed in the center, and the second one should be connected to ground, in other words, to the car body.
There is a special rod in front of the controller; when it rotates, the device starts. In other words, to diagnose the performance of the regulator, the rod should be rotated; to do this, an iron tube of the same size should be installed on it; this option is more successful.
When the rod starts to rotate, data about the alternating voltage, or more precisely, its surges, will be displayed on the multimeter screen. Moreover, the higher the rod rotation speed, the larger the jumps in values will be. This voltage does not jump, this indicates a controller malfunction.

The device can also be checked without dismantling it, but to implement this method, you must drive your “Fifteen” onto an overpass or pit:

When the car is in the pit, you will need to jack up the front left wheel.
Next, you need to find the controller itself, which is located on the gearbox, and then disconnect the connected wiring from it.
Then take a multimeter and connect its probes to the ground contact, also transmitting the impulse to the control unit, this is the central one, also the very last contact on the block.
Now you need to spin the jacked wheel and diagnose the values that the multimeter gives for the occurrence of voltage surges. In this case, if you do not have a tester, then you can use an ordinary test lamp with wires connected to it. One of the wires should be connected to the left contact, in other words, power, and the second to the central one. If the light source begins to blink when the wheel rotates, this indicates that the DS is working.

Perhaps the reason the DS is not working is due to poor contact with the car's electrical network, then you will just need to clean or replace the contacts. Before diagnosing, carefully inspect the device; if it shows severe signs of damage, then there may be no point in even inspecting it (video creator - REMONTYCA channel).

Functions and principle of operation

The purpose of a high-speed controller in injectors and carburetor engines is to transmit information about the speed of the vehicle to the dashboard. In other words, the working sensor will be able to transmit 100% accurate information about the speed of movement to the device so that the driver can control this data while driving.

As for the operating mechanism, the DS operates on the basis of the Hall effect:

the controller transmits voltage signals to the control unit with a frequency that should be directly proportional to the speed of rotation of the driving wheels of the vehicle;
the control unit, in accordance with the received DS signals, adjusts the operation of the unit at idle speed and, using the idle speed sensor, controls the air supply bypassing the throttle;
the frequency of the controller pulses itself should be directly proportional to the actual speed of movement.

Errors and symptoms

What are the signs that indicate the failure of the controller or the occurrence of defects in its operation:

during diagnostics, error P0500 appears - this composition indicates that there is no signal coming from the DS;
the next code - P0503 - states that the incoming signal is interrupted for some reason;
one of the most possible signs of a breakdown is that the speedometer shows incorrect values, namely, the needle on the dial moves randomly in different directions;
another symptom - the car engine began to idle intermittently;
at idle speed fluctuates;
Also, during acceleration, the driver may notice failures, that is, when he presses on the gas, there is no gain of power, the engine does not react to this in any way;
fuel consumption has increased.

As for the malfunctions themselves, the speed controller may fail for the following reasons:

there are no contacts between the device and the on-board network;
there was a break in the electrical circuit of the regulator;
another reason is a malfunction of the mechanical drive of the device;
as a result of wear or damage, the sensitive element of the controller could break, in particular, we are talking about electronic devices (the author of the video is the Glaz Szalg channel).

Characteristic

Where is the speedometer sensor located in the VAZ 2115? As can be seen from the photo, the device is located in the upper part of the gearbox housing. However, accessing this controller is not very easy. To get to the device, you need to drive the car into a pit or overpass and crawl under the bottom of the car.

Functions and principle of operation

The purpose of the speed controller in injectors and carburetor engines is to transmit information about the vehicle speed to the dashboard. That is, the working sensor will be able to transmit 100% accurate information about the speed of movement to the device so that the driver can be guided by these data while driving.

Tips for motorists

Nowadays, driving a VAZ- 2115 with a faulty speedometer can become a very expensive task. Since the driver is unlikely to be able to accurately determine the speed of the car by eye. But on the roads, in addition to traffic police inspectors with radars, there are also camouflaged radar detectors with video recording systems, which cannot always be noticed in time. Therefore, the amount of fines can easily exceed the amount you will pay for speedometer repair.

Most VAZ-2115 cars have injection engines. In this case, they will be equipped with electronic speedometers that receive information from the speed sensor. If the VAZ-2115 is equipped with a carburetor engine, then the speedometer will be mechanically driven using a flexible cable.

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The most common malfunction, due to which the readings of the electronic odometer disappear and the speedometer needle stops moving along the scale, is the failure of the speed sensor. Although, to be more precise, the same thing will happen if contact is lost as a result of corrosion in the speed sensor connector. True, the loss of contact is not always permanent; sometimes, due to vibration of the engine and transmission, contact is either lost or reappeared, and the speedometer needle begins to twitch in time with this process.

To determine a malfunction associated with a failure of the speedometer, you can do a test on the dashboard. To do this, press the daily mileage reset button, hold it pressed and turn on the ignition. If all instruments are working properly, then the arrows from the beginning of the scale move up to the end of the scale, and then return back, and this is repeated three times. The movement of the arrows will indicate that the device itself is working. This means that the reason the speedometer refuses to work when the car is moving, in this case, will be the speed sensor, which will have to be replaced.

A possible mechanical failure that could cause the speedometer to stop working could be a failure of the gear drive of the speed sensor. This happens either due to the cutting of the gear teeth, or due to the cutting of the edges of the drive shaft tip. In these cases, the torque from the secondary shaft of the gearbox will not be transmitted to the speed sensor shaft, which will lead to the absence of pulses, the frequency of which determines the vehicle speed.

Vehicle speed is the main parameter that every driver must monitor. Exceeding the permissible speed limit is not only fraught with a fine, but can also lead to serious consequences. Where is the VAZ 2115 , what malfunctions can occur in its operation, how to check and replace the controller - you will find answers to these questions in this article.

Design and principle of operation

The sensor is a complex of mechanical and electronic components operating according to the Hall principle.

The rotating parts convert the electrical signal into a chain of pulses that are multiples of the rotation of the sensor axis. Due to the mechanical connection of the sensor rod with the wheel hub, the rotational movement of the wheel is converted into the distance traveled.

when the outer surface of the tire rotates 360°, the wheel moves horizontally a certain distance;
this path is equal to the circumference of the tire, it is programmed into the engine ECU;

Important: Installing wheels of a non-standard size disrupts the operation algorithm of the VAZ 2115 speed sensor.

Both of these parameters are involved in the coordinated operation of the engine's electronic control unit.

What to do if the speedometer on a VAZ 2115 does not work

Today, driving with a faulty speedometer is risky and expensive. If the driver has a developed sense of speed, he can still get carried away and not notice the excess. But automatic means of recording violations will notice. There are a lot of cameras on roads now, but it’s not always possible to see them in time. The amount of the fine will exceed not only the cost of repairs, but also the cost of a new speedometer.

Also, during troubleshooting, edit the vehicle mileage. In the case of a carburetor engine, you can do this yourself. If your car has an injection engine, then the speedometer adjustment should be carried out by professionals, since this requires access to the car’s electronic memory, and here you cannot do without the appropriate skills and the necessary software.

If the speedometer on a VAZ 2115 injector does not work, then the reasons may differ from those on a VAZ 2115 with a carburetor engine. If your car has an injection engine, then the speedometer on it is electronic. It is connected to the speed sensor.

On a VAZ 2115 with a carburetor engine, the speedometer operates using a mechanical drive on a flexible cable.

Fault repair

In fact, if the VAZ-2115 speedometer does not work, the reasons for which have already been established, no one repairs the speed sensor on these VAZ models. It is much faster and easier to replace this entire unit. Its cost is about 400 rubles, which is not that expensive. To begin the process of replacing the speedometer, you should drive the car into a pit and prepare:

Screwdrivers.
Pliers.
Set of wrenches.

If there is no hole nearby, then you first need to remove the terminals from the battery, and then remove the air filter and only then the intake pipe. Next, remove the terminal from the speedometer sensor itself. However, if the car uses a cable drive for the speedometer, then it must also be removed.

Next, you need to clean the work area of dust, debris and oil. Then proceed directly to replacing the part:

Remove the terminal block using the buttons that deactivate the spring clip.
Using a 21mm wrench, remove the speed sensor.
Attach the new sensor so that its rod precisely hits the fixing sleeve.
Tighten the thread back with a 21mm wrench. Do not overtighten, so as not to damage the integrity of the plastic speedometer housing.

Based on the results of the work done, the result can be assessed immediately: if the speedometer does not fit into the socket, it means that its rod has not moved into the bushing. Therefore, you will have to repeat the above procedure until success is achieved. When the speedometer is installed, you then need to return all the dismantled parts to their place, connect the power and check the operation of the new sensor while the car is moving.

VAZ 2115 speedometer does not work reasons

Most often, the electronic odometer stops displaying speed due to a breakdown of the speed sensor. The cause may also be a contact failure associated with oxidation of the metal in the plug connection. Although, if the contact is poor, the speedometer needle may periodically shudder when, due to vibration during vehicle operation, contact is temporarily restored.

2115 speedometer with an injection engine does not work , you can use a simple dashboard test to check its serviceability. You need to press the mileage reset button and, holding it, turn the ignition key. If the panel instruments are working properly, then the arrows on their scale will move three times from the beginning to the end of the scale and back. This means that the problem is in the speed sensor, but the speedometer itself is fine.

If the speedometer 2115 with a carburetor engine does not work, then the reason is probably that the gear drive, which transmits readings from the speed sensor, has failed. The cause is one of two mechanical damages: the edges of the drive shaft tip are cut off or the teeth on the gears are damaged. Because of this, the transmission of torque to the sensor shaft from the gearbox shaft stops.

In a working car, the speed is calculated by the number of pulses generated by the sensor per second. And in this case, the speedometer will not work , since there will be no impulses.

Replacing the speed sensor on a VAZ 2114. And all possible faults related to it.

DIY replacement instructions

The procedure for replacing the DS with your own hands looks like this:

First of all, you need to turn off the ignition and open the hood.
To make the repair procedure more convenient, you can dismantle the adsorber. To do this, you simply need to unscrew the nuts that secure this unit, and then remove it to the side. Completing this step will take literally 1-2 minutes, but it will greatly facilitate access to the device.
After this, you need to tighten the fastener and remove the connector with wiring.
After completing these steps, you can begin dismantling the device. You need to turn the device counterclockwise until you completely unscrew the DS. Remove the DS from the seat; for this you will need a 21mm wrench.
The installation site of the DS must be cleaned of dust and dirt to prevent it from getting inside.
Next, a new DS is installed; in this case, you must act carefully. The bottom line is that the controller body is made of plastic, so even minor mechanical impacts can lead to its failure. Mount the DS into the mounting location so that its grooves completely coincide with the bushings, otherwise you will not be able to securely fix the device in the installation location. Turn the DS clockwise until you feel resistance. There is no need to tighten the device too much.

VAZ 21099 speedometer injector does not work. Why the speedometer does not work on the VAZ 21099 injector

from Admin

The seller provides the following guarantees:

For BMW passenger cars and SUVs – a two-year warranty for the entire vehicle without mileage limitation, according to the standards of the Vehicle manufacturer BMW AG from the date of first registration of the Vehicle; The warranty period for additional equipment that was not manufactured and/or installed by BMW AG is determined in accordance with the warranty conditions of the manufacturer and/or the company installing the relevant equipment; A change in the owner of the car does not affect the Seller’s warranty obligations regarding the Car; proceed to BMW repair. Installing the Mileage Winder Largus Logan Duster Sandero Almera Terrano in OBDII

SPEEDOMETER DOES NOT WORK # WHAT IS THE REASON? # HOW TO FIX THIS PROBLEM? # I ELIMINATE ALL ERRORS ON THE CAR!

The warranty is void if: The Seller does not promptly report the defect or does not provide an opportunity to immediately eliminate the reported defect; The vehicle has been overloaded, misused or used for competition or rallying; The vehicle is modified in a way that is not accepted by BMW AG; The Seller did not take into account the instructions and rules for the operation and maintenance of the Car. Speedometer doesn't work

The warranty is not valid and costs are not covered in case of natural wear and tear of the Vehicle, as well as when replacing components in case of normal wear and tear (tires, spark plugs, windshield wipers, brake pads, discs, etc.). The warranty does not cover costs associated with periodic maintenance of the Vehicle, adjustments and inspections, as well as costs or damage resulting from the Vehicle's downtime. REPAIR OF SPEEDOMETER VAZ 2109 08 099 AUTO EQUIPMENT 5

The warranty becomes invalid upon expiration of the period specified in paragraph 1.

BMW AG reserves the right to make changes to certain clauses of the warranty conditions. You can obtain more detailed information from our warranty specialists.

The seller provides the following guarantees:

The warranty is not valid and costs are not covered in case of natural wear and tear of the Vehicle, as well as when replacing components in case of natural wear and tear (tires, spark plugs, windshield wipers, brake pads, discs, etc.). The warranty does not cover costs associated with periodic maintenance of the Vehicle, adjustments and inspections, as well as costs or damage resulting from the Vehicle's downtime.

The warranty becomes invalid upon expiration of the period specified in paragraph 1.

BMW AG reserves the right to make changes to certain clauses of the warranty conditions. You can obtain more detailed information from our warranty specialists.

Troubleshooting

A breakdown of the mechanical speedometer drive is rare, but it is also more difficult to fix. Having purchased a new cable, you need to disassemble and replace it in the following sequence:

Unscrew and remove the instrument panel. Here you will have to work hard to remove the plastic decorative trims, unscrew all the screws and remove the clamps.
Disconnect the connectors of the low beam switches, hazard lights and side lights.
Remove the radio, disconnect the wires from the cigarette lighter and unscrew the panel mounting screws.
Pull the end of the flexible shaft out of the speedometer block. Unscrew the second end from the gearbox; it is mounted into the differential housing on the top side.

Replacing an electronic speed sensor is much easier and less time consuming. Before carrying out work, you must make sure that the cause is in the sensor and not in the wiring or contacts. To do this, the contacts should be cleaned and the insulation of the wires should be checked visually.

Having prepared a set of keys, pliers and screwdrivers, you can begin replacing the device, following the following algorithm:

Disconnect the negative battery terminal (ground). Remove the air filter and air duct pipe.
Disconnect the connector from the sensor and clean the place where it is installed from dirt so that it does not get inside the gearbox when removing it.
Using a 22 mm open-end wrench, loosen and unscrew the sensor nut. Remove it and cover the hole with a rag.
Install a new meter; there is no need to tighten the nut too much. Connect the connector, install the air filter and replace the battery terminal.

VAZ 2115 Samara cars use 2 types of speed sensors - from the Bosch and General Motors brands. The former are distinguished by a square connector shape, the latter by a round one. These features do not affect the principle of operation and the procedure for replacing parts. There are also Russian-made elements of the January-4 type, which have a round connector.

Vehicle speed is a key parameter that must be constantly monitored. Exceeding the speed limit not only risks getting a fine, but can also lead to serious consequences. More on this later in the article.

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They would live in Germany, standing on the fenders of a car, and the other two put boards so that the crowbar would be installed on the boards, and the engine would stop working, the speedometer VAZ 21099 injector. Installing a zero resistance filter will reduce the mileage before repair by at least 3 times. I think this method is suitable for those who change the springs to new ones, good luck to everyone in the repairs. Please note that if you set the pedal so that it is lower than the brake, then the grabbing will appear when the pedal just leaves the floor. The relay is located inside the mounting block next to the fuses.

The brake cylinder must be dry and free of brake fluid leaks and dust caps. The acoustic shelf on the VAZ 2109 is installed for a number of reasons, the main one of which is to create a clear and pure sound from the acoustic system. And the second problem is what the crank mechanism consists of. Rear disc brakes 13 caliper discs with notches. They can be carefully removed and the standard fabric replaced with vinyl artificial leather, then the doors will look fresh and presentable. I cured it, I put my stock throttle back, and with it the car drives softer and smoother.

What does the operation of the pointer depend on?

An ignorant motorist may think that the speedometer of the VAZ 15th model itself has broken down and that half the car will have to be disassembled in order to change it. In reality, this happens extremely rarely; the reasons usually lie in the devices that transmit the signal for the speed indicator. It is quite easy to make sure that the instrument panel, including the speedometer needle, is in good working order: when you turn on the ignition, all indicators should jump to the maximum.

The operation of the indicator on the instrument panel depends primarily on the speed meter installed in the gearbox. The following types of sensors exist:

mechanical;
electronic.

The first ones were installed on carburetor VAZ 2115 models. The meter is a steel cable in a casing, rotated by the speedometer shaft drive built into the gearbox. That is, the drive shaft is mechanically connected to the pointer and odometer directly, so that this device is quite reliable in operation and rarely fails.

The electronic speed sensor, installed on more modern versions of cars with an injector, is a coil of thin wire with a core. It operates according to the Hall principle: the frequency of electrical pulses passing through the coil changes when a significant metal mass appears next to it. The controller that controls the speed indicator and odometer supplies the sensor with a constant voltage of 12 V, and in response receives a pulse signal, the frequency of which depends on the revolutions of the secondary shaft of the gearbox, and therefore on the speed of the vehicle.

It is the malfunction of the electronic meter that most often becomes the reason why the speedometer 15 of the VAZ model does not work. The sensor is considered a device of average reliability and can fail at any time. There have been cases when the sensor had to be changed after 300 km of a new car. The cable drive of the carburetor modification fails much less frequently, once every 100-150 thousand km.

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With the tank installed, even a novice who is completely unfamiliar with controlling the manual choke of a carburetor can start a carburetor car in winter. I drove the car into the garage and started disassembling it. To flush the stove radiator, you can use a deep-well pump. Leader Plus towbars and components are made only from high quality steel, properly processed.

I looked at the diagram, they go to the connector there, but I didn’t find it. The air conditioning radiator on Priora is located in front of the engine radiator. Of course, law enforcement agencies rarely find fault with this type of tuning, but there is still a chance of getting a fine during a technical inspection. The main problem with replacing the belt is that on cars with air conditioning the belt passes through the engine mount, and if on cars without an air conditioner the belt can be changed simply by removing the old one and installing a new one, then on cars with air conditioning you need to remove the engine mount. The adjacent edge is adjusted in place using a grinder. In addition to the control function, the steering column also provides a standard set and does not require any manipulation of metal. Also, they will probably recommend replacing synchronizers at an average cost of 400 rubles apiece. Sometimes breakdown occurs due to insufficiently strong contacts.

Sources:

https://bmwpmr.com/video/2011084656-vaz-21099-ne-rabotaet-spidometr-inzhektor-pochemu-ne-rabotaet-spidometr-na-vaz-21099/

Types of installed meters

Replacing a speed sensor with your own hands for a VAZ 2115 is not much different from replacing it on any car of the “tenth series” (for example VAZ 2110-2112), as well as the Samara series (VAZ 2113-2115), and new products such as Lada Kalina , Grant or Priora. The sensor itself is located on the rear side on top of the gearbox (when viewed from the radiator) directly above the differential, where the wires come out (in the photo below it is shown by an arrow, look under the pipes).

The meter we are looking for is located under the pipe indicated by the arrow.

At different times, three types of sensors (meters) were installed on VAZ models. The first of them is no longer used on new cars.

Type No. 1

Installed on the first Samaras with an injector with a cable-driven speedometer:

It was installed as an “intermediate insert” between the speedometer cable and the gear output to the gearbox.
Wires with a connector extend from it to the side.

Speed meter of the first (oldest) type

Its malfunction can only be determined with a special diagnostic tool at the same speed at idle. And also when the car is coasting and when stopping.

Sometimes, when such a breakdown occurs, the car begins to stall immediately after engaging the “neutral” (neutral gear) while driving. This happens due to the fact that the car, when driving, maintains a slightly higher idle speed initially (1000 instead of 850 if the car is stopped). This is designed for smooth shifting when coasting from neutral to gear.

Attention: Before replacing, it is recommended to check the drive mechanism (on which the meter sensor is screwed)

You can do this by trying to turn the drive using any available means. Carefully! So as not to break the square window.

Type No. 2

A newer model of the meter is installed on subsequent models of injection vases. Its main difference is an electronic speedometer and the complete absence of a cable. It is screwed directly onto the output of the drive gear.

Type 2 speed meter, newer model without cable

If it breaks down, the speed of the car stops being displayed on the instrument panel. The rest of the symptoms are the same as those of the first model.

Type No. 3

The newest version in which the unreliable drive mechanism (in the event of a breakdown, the box had to be removed and disassembled) has been replaced with a modern electronic one (which is based on the Hall effect).

Speed meter based on the Hall effect

The consequences of failure of such a meter are exactly the same as those considered in the previous analogue. However, on cars with this type of sensor, electric power steering (abbreviated as EPS) is installed. If the meter fails, the force when turning the steering wheel changes, and in some cases the EUR winding burns out. This is especially unpleasant if there is a “floating” defect in the speed meter. When turning, the force on the steering wheel begins to change. This scares some drivers. Now the EUR has been abandoned.

Attention: Such meters have completely different markings for Priora and Kalina and are not interchangeable!

Before buying a new one, you need to check which meter is installed on your machine. The marking of the meter is written on its side belt.

Hard case

Until now, situations have been sorted out when the torpedo still showed some signs of life. If non-working power windows, turn signals, and windshield wipers have been added to the devices, the issue is no longer a matter of relays and fuses.

There may be 2 options:

The contacts on the ignition switch are burnt
. In principle, after installing the relay (even on the VAZ-2109 version), this problem rarely arises. However, the possibility remains. The lock is removed, the contacts are checked and, if necessary, cleaned;
Mounting block
. There may be burnt tracks on its board. The only thing that will save you is replacing it with a new one. However, the cost is by no means astronomical, and the installation is available as a standalone option.

How to select a new element and where to look for it on the car

The sensor itself is not repairable, so if problems arise in its operation, it is simply replaced.

But we note that since this model uses several types of sensors, for replacement it is necessary to select exactly the same one as was installed on the car, since different types are not interchangeable.

It is better to do this using the catalog number (2111-3843010), or according to the markings applied to the DS itself. But for this it must first be removed.

Since the sensor operates from the drive rod, its location is at the gearbox. You can find it on the upper plane of the gearbox housing near the differential.

You can also see it from above, looking down at the box in the area of the brake fluid reservoir.

But it is difficult to reach it by hand from the engine compartment, since other elements will interfere. And yet you can reach it, but only to disconnect the chip with the wiring.

Troubleshooting

A breakdown of the mechanical speedometer drive is rare, but it is also more difficult to fix. Having purchased a new cable, you need to disassemble and replace it in the following sequence:

Unscrew and remove the instrument panel. Here you will have to work hard to remove the plastic decorative trims, unscrew all the screws and remove the clamps.
Disconnect the connectors of the low beam switches, hazard lights and side lights.
Remove the radio, disconnect the wires from the cigarette lighter and unscrew the panel mounting screws.
Pull the end of the flexible shaft out of the speedometer block. Unscrew the second end from the gearbox; it is mounted into the differential housing on the top side.

Having prepared a set of keys, pliers and screwdrivers, you can begin replacing the device, following the following algorithm:

Disconnect the negative battery terminal (ground). Remove the air filter and air duct pipe.
Disconnect the connector from the sensor and clean the place where it is installed from dirt so that it does not get inside the gearbox when removing it.
Using a 22 mm open-end wrench, loosen and unscrew the sensor nut. Remove it and cover the hole with a rag.
Install a new meter; there is no need to tighten the nut too much.
Connect the connector, install the air filter and replace the battery terminal.

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How to check

First of all, we carry out a visual inspection. The wires must be intact and have no obvious kinks or damage to the insulation. The cleanliness of the contacts on the connector is also checked. After inspection, we check the electrical part of the device.

You can jack up one of the front wheels of the car and spin it with the ignition on (we don’t start the engine). Voltage surges are checked using a multimeter at the information contact (central terminal).
If you remove the sensor, you need a device to force the rod to rotate. A voltage of 12 volts is supplied to the power terminals, the tester is connected to the negative terminal and the signal contact. When rotating, we register impulses. If they are not there, the sensor needs to be changed.

To replace, you will need a 21 key. We replace the faulty part with the negative terminal of the battery reset.

Advice: You should not save money by buying a cheap sensor from a dubious manufacturer. A branded part is not so expensive that you risk a breakdown on the road, where there will be no way to diagnose and replace the speed sensor.