What is the construction and purpose of an ABS speed sensor?

The ABS speed sensor is an electronic component mounted at the wheel, hub, or steering knuckle that reads the wheel's rotational speed. A typical sensor consists of a sensor housing, a measuring tip, a cable or socket, and a plug matched to the car's installation. Its task is to transmit a signal to the ABS controller, which then controls the operation of the braking system.

What is the ABS speed sensor used for?

The ABS speed sensor is used to monitor the rotation of each wheel during driving and braking. Based on this data, the controller recognizes the moment of traction loss and can appropriately control braking pressure. Without a proper signal, not only ABS functions but also selected stability assistance systems may stop working.

What is the construction and function of an impulse ring?

The impulse ring is a component that works with the ABS sensor, located at the hub or integrated with the wheel bearing. Its task is to create a reference signal that the sensor reads as wheel rotation. Depending on the design, it can take the form of a toothed ring or a magnetic ring, so the sensor type and the solution used by the manufacturer must be taken into account during selection.

How to choose the right ABS speed sensor for a car?

It is best to compare the OEM number, vehicle location, mounting side, and plug type. You also need to check whether a front or rear sensor is needed and whether the installation uses an active or passive version. In many cases, comparing interchangeable numbers is also helpful.

What symptoms indicate a problem with the ABS sensor?

Most often, an ABS warning light appears, errors are saved in the controller, or unstable readings from one wheel occur during diagnostics. Sometimes, the ABS may fail during hard braking, or ESP and traction control may malfunction. Similar symptoms can also be caused by a damaged cable, connector, or impulse ring.

What should be paid attention to when installing an ABS speed sensor?

It is important to clean the mounting area, check the condition of the socket, and correctly route the cable in the factory brackets. You should also ensure that the sensor works with the correct ring and has no play in the mounting. After installation, it is worth checking for errors in the controller and reading the speed of each wheel.

ABS speed sensor

At Global Parts, we offer a wide selection of original used car parts, including ABS speed sensors for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Our ABS speed sensors undergo quality control to ensure you receive a top-quality product.

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