Anti-lock Brake System (ABS) Sensors

Technology such as anti-lock brakes (ABS) and electronic stability are now common place thanks to the ABS sensor or wheel speed sensor. A small device, it has a big role to play; monitoring the wheel’s speed and rotation to prevent the brakes from locking. So, it’s important to always fit an OE quality part - anything less could compromise the effectiveness of these safety critical systems. Featuring weather pack connectors and plated pins, and rigorously tested to OE standards, Delphi ABS sensors deliver optimum signal stability and reliability in all conditions, for an accurate, long-lasting sensor that you can fit with confidence.

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Latest OE technology

Our ever-expanding range of ABS sensors features the latest digital signal technology. By creating a digital, square wave, Delphi magneto resistive and hall effect sensors only change frequency, not amplitude, improving accuracy, especially at lower speeds. They can also detect the direction of the wheels; forward, reverse and even stop. This is vital for hill hold control, autohold and automatic parking assistance technologies.

Protection from the elements

Given its position, the ABS sensor is particularly vulnerable to contamination from dirt and moisture. That’s why Delphi ABS sensors feature weather-pack connectors that lock out dirt, moisture, chemicals and other contaminants, coupled with plated pins for even great corrosion protection and improved conductivity.

Extreme testing

Water, heat and vibration can all affect a sensors characteristic. So we subject all our sensors to extensive thermal, shock and vibration testing just to be sure. With test temperatures ranging from -40 o C to 140 o C, we know they’ll perform even in the most challenging conditions. Delivering optimum stability and reliability at all times.

Easy installation

For right-fist-time fitment, Delphi ABS sensors are designed to match the OE. With like-for-like mounting and connector designs and wire lengths, technicians can fit quickly and easily, straight from the box.

The complete solution

As well as a growing range of ABS sensors, we also offer advanced diagnostic capability including the ability to read live fault codes and individual wheel speed data, essential repair data through our vehicle technical information package, and expert training and technical support.

The Delphi Difference

100 years of OE experience, supplier to the world’s top automakers
OE heritage and knowledge built into every aftermarket part
Comprehensive portfolio for a wide range of vehicles and model years
Streamlined SKUs for easy inventory management
Support through tools, tips and training

Related product resources and downloads

2 min read

How to diagnose warped brake discs

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Braking How to Distributors Shop Owners Technicians 2 min read

Resource Highlights

Our Delphi Technologies Expert talks about whether brake discs can be supplied warped, explains disc thickness variation and takes you through a brake disc runout check.

Can new brake discs be supplied warped?

Modern manufacturing processes and materials make warped discs out of the box extremely rare. If there is braking vibration or other symptoms, this could be caused by Disc Thickness Variation (DTV) or runout.

What is Disc Thickness Variation (DTV)?

Both the front and rear face of the brake disc should be flat and be in parallel with one another. Nothing is perfect, but they should be flat within a tight tolerance. If you were to measure around the face of the disc at different points and find that it measures differently in thickness (meaning that it’s not perfectly flat and not parallel), that is DTV. Manufacturers will stipulate varying tolerances for this in the vehicle handbook. A high DTV measurement could cause a common misdiagnosis of a warped disc.

How do you measure DTV?

Use a vernier caliper to measure the thickness between the front and rear faces of the disc in different areas. If there are any differences in the thicknesses, this is Disc Thickness Variation (DTV).

What is the difference between DTV and a warped brake disc?

Whereas Disc Thickness Variation (DTV) is caused by the disc wearing unevenly (causing the faces of the disc to no longer be parallel with one another), a warped disc is a distortion within the uniform thickness of the disc surface.

What is the difference between DTV and runout?

DTV is when the faces of the brake disc are not flat. Runout is a measure of how off-centre a brake rotor is as it rotates around the hub. If the hubs aren’t clean from dirt or debris, then this can cause runout and braking vibration. If they are clean, then the bearings or hub may be faulty.

How do I carry out a disc runout check?

Mount a dial gauge on a fixed point on the suspension and move the dial gauge into position on the face of the brake disc. Rotate the disk and note any changes in the position of its surface. DTV can cause disc runout, but if the disc has previously been checked for DTV, then any high points would indicate another reason for disc runout, such as unclean hubs.