Honda ABS Sensor Replacement

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Here's how to replace an ABS sensor on a Honda Accord.

The ABS sensor is responsible for telling the car's computer how fast each wheel is rotating. When the computer detects a difference in wheel speed, indicating a skid, it activates the anti-lock braking system on that wheel, to prevent the skid.

ABS sensors are simple in composition, consisting of a coil. The hub or CV shaft typically has splines that are magnetic. As the wheel rotates, the ABS sensor generates a small voltage from the splines moving across the sensor, and converts it to pulses to monitor wheel speed.

Often times the ABS sensors become corroded, mis-calibrated, physically damaged or dirty and need to be replaced. In this case the ABS sensor was broken after removing the steering knuckles to change ball joints.

This video is a step by step tutorial on how to remove and replace the ABS sensor on a 2003-2007 Honda Accord. It will also apply to many other vehicles, including the Acura TSX, Acura TL, Civic, CR-V, Odyssey and Element.

First the ABS sensor is disconnected from under the hood. Measure the resistance in mega ohms using a multimeter to verify it is malfunctioning. A good sensor should measure more than 400 mega ohms.

Often the ABS sensors get rusted into the knuckle and will break off. The steering knuckle will then need to be removed to get access to drill it out.

In this case, the upper and lower ball joint, CV axle, tie rod and brakes have to be removed from the knuckle to get it off the vehicle. Once the old sensor is drilled out, the area is cleaned and prep'd for the new sensor.

Once the knuckle is reinstalled onto the car, then reinstall the ABS sensor and route the wiring. This will prevent damage to the ABS sensor during knuckle installation.

Dorman ABS sensors were used as a replacement.

Part number: 970029 and 970028 for the front wheels.