Bosch ABS Pump

ABS pumps: How they work and what to do if they become faulty

We’ve all been there: you’re driving along, and as you brake, you feel the brake pedal pulsing rapidly under your foot. This isn’t your imagination, this is your ABS pump and valve system engaging to stop the wheels from locking, preventing your car from skidding.

What is ABS?

As car enthusiasts among you will know, ABS controls the effect of the braking system on the wheel to regulate the braking pressure. The fact is that a wheel can decelerate from 60mph to zero in close to a second, whereas stopping a car that weighs up to a tonne is not so quick. While the wheels are stopped quickly, the momentum of the car continues to pull the locked wheels along, resulting in a moving car with locked wheels, which can lead to loss of control of the vehicle.

Within this system there is a series of valves on the brake lines that are intended to take some of the pressure from the brakes. Essentially the valves, together with a speed sensor, understand when the car decreases in speed too rapidly, and regulate the pressure on the brake – reducing pressure when it risks the wheel locking – and pumping pressure back in when it can take more. This allows a smooth controlled deceleration. The pump that allows the pressure back to the wheel is unfortunately one part of the system that is vulnerable, and prone to faults.

So how do you know if your ABS pump is faulty?

There are some tell-tale signs to a faulty ABS system. Some are obvious: your indicator light may be on and you may feel a loss of control as the wheels begin to lock when braking. Other signs are subtler: you may notice a slackness in your brake pedal, or that it takes increasing amounts of effort to achieve the same braking as usual.

The next step is to run diagnostics and then find a repair centre. Due to the intricate electronics involves in the ABS system, this is not something that can be done as a DIY job. Autotronics are specialists in electronic repairs with over 20 years of experience and we’re set up for exactly this kind of job. We specialise in the repair of vehicle electronics for domestic and commercial customers and we have most ABS pump repairs listed on our website.

All you need to do is select the model and follow the instructions. We offer repairs of many different types of electronic components including remote key fobs, immobiliser units, airbag modules, ECUs and much more.

Usually, repairing parts works out cheaper than replacing them, and in the case of an ABS pump it’s as simple as sending it in and letting our engineering team do the rest. We offer peace of mind guarantees, and our turnaround times are as quick as 1-4 days, so make sure you don’t risk skidding in the icy weather this winter with faulty ABS!