Anti-Lock Speed Sensor Replacement at your home or office.

Our certified mechanics come to you · Backed by our 12-month, 12,000-mile warranty · Get a fair and transparent estimate upfront

Anti-Lock Speed Sensor Replacement Service

What is the Anti-Lock Speed Sensor all about?

In older vehicle generations, all brake systems were susceptible to locking up. If you’ve ever pressed the brake pedal hard and heard the screech of rubber on asphalt, you know exactly what the main problem with the systems was. Anti-lock brake systems were designed to help alleviate the problems inherent with locking up your wheels, namely sending your vehicle into an uncontrolled skid, resulting in the potential for significant damage and injuries.

Anti-lock brake systems get around this problem by monitoring the speed of the wheels. If one wheel is turning faster than the others, the system kicks in and automatically pulses the brakes on that wheel (up to a dozen times per second or more). This slows the wheel and prevents the brakes from locking up.

In order to monitor wheel speed, the system uses an anti-lock speed sensor, more commonly called a wheel speed sensor. There is a combination of magnetic and electronic components that are mounted at the wheel hub (in most instance), and measure the rotational speed of the wheel. They send a signal back to the ABS module which determines if wheel slip is occurring. There are three primary types of anti-lock system on the market, but all use individual sensors for the front wheels. Some use individual sensors for the two rear wheels, while others use a combined sensor.

Wheel speed sensors are subject to both temperature extremes and the potential for damage through collision with debris or during an accident. If the sensor fails, the ABS system cannot monitor the wheel’s speed, and will not engage, or may engage needlessly if an incorrect reading is given.

Keep in mind:

  • Wheel speed sensors can be damaged in many different ways.
  • Anti-lock speed sensors are not inspected during routine maintenance.
  • Without functional speed sensors, your ABS system will not work; the ABS light on the dash will come on and a brake system code will be set in the computer.

Our recommendation:

The anti-lock speed sensor on each wheel is crucial to the operation of the ABS system as a whole. It’s responsible for measuring the speed of the wheel and sending that information to the computer, where it’s compared to the speed of the other wheels. If the speed is too fast, the computer automatically pulses the brakes. However, if the sensor is damaged or has failed, the computer lacks enough information to turn on the ABS system. Have any ABS brake system problem inspected, diagnosed, and replaced by one of our expert mechanics immediately.

What common symptoms indicate you may need to replace the Anti-Lock Speed Sensor?

  • ABS light is on in the dash with brake system code set in the computer
  • ABS system will not engage
  • ABS brakes apply randomly

How important is this service?

Without functional wheel speed sensors, your ABS system will not work properly. That can lead to uncontrolled slides if you lock up the brakes or increased stopping distances if the ABS brakes kick in needlessly. Have your brake system inspected and replaced by a professional technician immediately if you notice the ABS light on in the dash, or suspect there’s a problem with the system.

Fast and easy Anti-Lock Speed Sensor Replacement service at your home or office.

Recent articles & questions

Symptoms of a Bad or Failing Parking Brake Drum
If your car's parking brakes don't hold or just work poorly overall, you may need to replace the parking brake drum.
How to Prepare for the Oklahoma Driver’s Written Test
You You have quite a few things to do before you can take your road test and get your license in Oklahoma. Namely, you need to take and pass the written test so you can get your permit and actually...
P0813 OBD-II Trouble Code: Reverse Output Circuit Malfunction
P0813 P0813 code definition P0813 is the fault code for the Reverse Output Circuit. What the P0813 code means This is the generic OBD-II fault code indicating an issue within the reverse output circuit. When you shift your vehicle into...

Car not running after throttle body with IAC valve replacement

Hi, thanks for writing in. I would recommend retracing your steps. You are definitely on the right track. It sounds like you did a good amount of work to your car, and it is likely that something may been skipped...

Check engine light is on car sluggish and shaky

Your check engine light is on due to the misfire and engine running issue and should not be due to the oil change overdue. You should have the check engine light scanned then the code can identify that cause of...

Where is the crankshaft position sensor location?

The crankshaft position sensor is located on the driver side of the engine and in the back by the transmission on the engine. If you need further assistance with your crankshaft position sensor (, then seek out a professional, such...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 ·