How Many Wheel Speed Sensors Are On A Car? How is the function? new for 2022

Wheel speed sensors are important for the proper function of a car, but many people don’t know what they are or what they do.

A car’s wheel speed sensors play an important role in keeping your vehicle functioning properly. If one of these sensors is damaged or malfunctions, it can cause problems with your car’s braking and steering systems.

How Many Wheel Speed Sensors Are On A Car
How Many Wheel Speed Sensors Are On A Car

By understanding how wheel speed sensors work and what role they play in your car, you can be better prepared to deal with any issues that may arise. So How Many Wheel Speed Sensors Are On A Car? How is the function? Let’s start exploring together!


How Many Wheel Speed Sensors Are On A Car?

How Many Wheel Speed Sensors Are On A Car
How Many Wheel Speed Sensors Are On A Car

How many wheel speed sensors does a car have? Most cars have four wheel speed sensors that contribute to the car’s overall operation. However, there are a few makes and models of vehicles that only come with one wheel speed sensor. This is not the norm, however.

The following are the four most common types:

  • Four sensor ABS: The most frequent arrangement is one sensor for all four wheels.
  • Four sensors, three-channel ABS: There is just one sensor for all four wheels, however only one channel controls the back wheels.
  • Three sensors, three-channel ABS: One sensor is situated on each front wheel, while just one sensor is located on both back wheels – in this situation, the sensor is located in the rear axle. Both rear wheels are monitored jointly in this system; they must both lock up before the ABS is activated.
  • Two-channel, four-sensor ABS: There is a sensor at each wheel, but there is only one channel for each end of the automobile – one in front and one in back. If the speed sensor at any wheel senses wheel locking, the ABS for that end of the vehicle will activate.

Where is the ABS sensor located?

This sensor is involved with the anti-lock brake system, traction and stability control systems, and it’s also a part of the ABS in vehicles. Wheel speed sensors are located on the tires, but they vary depending on which set of fronts you have. Front sensors will generally be placed near to or within reach of the brake rotors, while rear sensors will be found inside the back end housing.

How does an ABS wheel speed sensor function?

The ABS wheel speed sensor measures the number of rotations per minute (RPMs) of the wheels. The ABS wheel speed sensor converts the pulses created by the magnet, and the sensor ring rotates. The voltage fluctuations are sent to the ABS control unit, which uses this data to determine whether the vehicle is moving and if its brakes are working properly.

Types of wheel speed sensors

Active sensors use a rotating magnet to measure the speed of the wheel. Passive sensors rely on air resistance to determine the wheel’s speed.

READ:  How To Grease A Wheel Bearing?

Active wheel speed sensors

Active wheel speed sensors differ markedly from passive sensors in terms of how they generate an output signal. Active wheelspeed sensors are activated only when supplied with a voltage, and this digital signal is then used by the ABS control unit to calculate vehicle speed.

Active wheel speed sensors use a sensing element that is connected to a magnetic or electric cable. This type of sensor is more efficient than a passive sensor because digital signals are more accurate at slow speeds and can detect which direction the wheel is turning.

Passive wheel speed sensors

Passive speed sensors rely on the movement of an impulse wheel to generate a signal. This signal is then used to calculate the speed of the vehicle.

The passive sensor creates an AC signal with varying frequencies according to wheel rotation speed, which is then converted into a digital signal by the ABS control module.

The front of the rear wheel speed sensors work either with or without a defined voltage from the ABS control unit. This ensures that the car does not slide or skid when brakes are applied.

Types of front wheel speed sensors

There are a few different front wheel speed sensors that you can choose from, depending on what type of sensor your car uses. The most common type is the OEM sensor, which is specifically designed for your car. However, if you want to save money, you can go with generic sensors.

ACDelco GM Front ABS Wheel Speed Sensor

ACDelco GM front wheel speed sensors are commonly used on GM vehicles, and as such, have a high level of quality and reliability. They conform to GM OEM specifications regarding fit, form, and function.

Mean Mug Auto ABS Front Wheel Speed Sensor

The Mean Mug Auto ABS front wheel speed sensor is compatible with BMW models and comes with pre-installed grommets on the wiring for easier installation. It has a lifetime warranty.

WMPHE 2-Piece ABS Wheel Speed Sensor

If you have a 2007 to 2017 Wrangler model, opting for the WMPHE two-piece front wheel speed sensor package will provide you with both left and right front wheel sensors. These sensors have been manufactured according to strict quality control standards, so you can be guaranteed high-quality measurements.

ABS 2-Piece Wheel Speed Sensor

The ABS two-piece wheel speed sensor set also includes a front and left front wheel speed sensor. These sensors are compatible with select Chevrolet and GMC models, and the housing is made from high-quality reinforced plastic to ensure accurate and water-tight connection to the engine wire harness.

READ:  How To Remove A Car Wheel?

What causes wheel speed sensors to stop working?

What causes wheel speed sensors to stop working
What causes wheel speed sensors to stop working

Wheel speed sensors are important components in a vehicle’s overall function, and knowing the causes of malfunctions is important so that damage can be avoided. If a sensor detects an issue with the wheel, it will send a signal to the vehicle’s computer. Knowing where to look for damage and taking appropriate precautions can help keep your car running smoothly.

  1. A main reason of failure is heavy contamination or debris.
  2. Broken wiring in the speed sensors might cause signal production and detection to fail.
  3. Internal short circuits will cause speed sensors to fail since they also function with voltage. Read on to learn about the causes and remedies to automobile short circuits.
  4. Another factor is driving with greater wheel bearing clearance.
  5. Mechanical damage to the wheel encoder, which monitors motor rotation, might have a negative impact on the wheel speed sensor.
  6. External damage of any type might affect the speed sensors.

What are the signs of faulty wheel speed sensors?

What are the signs of faulty wheel speed sensors
What are the signs of faulty wheel speed sensors

If a wheel speed sensor is failing, the car may not be able to accelerate or brake as quickly as it should. Additionally, the car may also have trouble shifting gears or turning corners.

  1. The ABS warning light switches on in the dashboard
  2. The traction control system (TCS) warning light is on
  3. The wheels lock during the brakes
  4. Fault code is stored
  5. Loss in traction when driving on slippery road conditions

Depending on the type of wheel, there are one to four ABS sensors on each wheel. These sensors help the ABS control unit know when to release the brakes.

If the wheel speed sensors have failed, you can replace them. Wheel speed sensors are commonly found in auto accessory and parts stores in the UAE or from a physical store. If you know how to diagnose a fault with wheel speed sensors, it is important to make sure that when buying a used car, it has working ones.

You can know more at How Do I Know Which Wheel Speed Sensor Is Bad? How To Tell Which Abs Sensor Is Bad?

How to replace an ABS wheel speed sensor?

How to replace an ABS wheel speed sensor
How to replace an ABS wheel speed sensor

The process of replacing a wheel ABS sensor on most vehicles is an easy one that can be completed by most DIYers in about 30 to 60 minutes. To watch a video demonstrating how to do this, please click the link below.

  1. Raise the car. Depress the parking brakes. Jack stands are used to secure the vehicle.
  2. Remove the wheel with a faulty ABS sensor.
  3. Find the ABS sensor, which is usually situated on the wheel hub.
  4. Remove the bolt that secures the ABS sensor. There is merely a single bolt. It might be rusty. If this is the case, spray penetrating oil on the affected area and wait 15 minutes.
  5. Take the sensor off of the wheel hub.
  6. Unplug the wire harness.
  7. In reverse sequence, replace the ABS sensor.
READ:  How To Align Tires? What You Need to Know About Tire Alignment

You can read more at the article What Does A Wheel Hub Do? All About Wheel Hub

What is the cost of replacing an ABS wheel speed sensor?

What is the cost of replacing an ABS wheel speed sensor
What is the cost of replacing an ABS wheel speed sensor

Wheel speed sensors are a common part that need to be replaced on cars and trucks, depending on where the customer resides and what kind of vehicle they drive. Depending on the location of the sensor, replacement costs can range from under $200 to between $300-400. Labor rates will vary among repair shops, and the cost of replacing the speed sensor or any additional wiring may depend on the type of vehicle.

Depending on the part, car owners can save anywhere from $100 to $150 by replacing it themselves. However, some aspects of the repair require specific tools, which could add to the cost and if done at home may not be as effective.

FAQs How Many Wheel Speed Sensors Are On A Car

Is ABS sensor same as speed sensor?

An anti-lock brake sensor measures the rotational speed of a wheel, and passes this information to the car’s engine control module. This is also called the wheel speed sensor or ABS brake sensor.

Can you drive a car with a bad wheel speed sensor?

If your car has a broken wheel speed sensor, the computer may not be able to determine the correct speed for your vehicle, which could lead to unsafe driving or even accidents.

What happens when a speed sensor goes bad?

When a faulty speed sensor prevents the car’s computer from receiving accurate speed signals, this can lead to the transmission shifting faster and roughly than usual.

How do I know which wheel speed sensor is bad?


Wheel speed sensors are important for modern cars because they help with braking and traction. Most cars have four wheel speed sensors, but there are some that have more or less. Our team from hope this article provided you many useful information. If you’re not sure how many wheel speed sensors are on your car or need help repairing them, our team of experts is here to help. Thanks for reading!

Related Searches

what happens when a wheel speed sensor goes bad
replacing wheel speed sensor
how to tell which wheel speed sensor is bad
wheel speed sensor working principle
where is the wheel speed sensor located
rear wheel speed sensor
wheel speed sensor replacement cost
wheel speed sensor types

See more articles in category: Wheel