BMW ABS Pump Motor Constantly Running
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A BMW ABS pump motor may constantly stay on even when the vehicle is turned off. As part of this guide, we examine common issues that can cause this issue.
Troubleshooting BMW ABS Pump Motor Constantly Running
Symptoms
- BMW ABS pump stays on.
- BMW ABS motor constantly running.
- Battery drains, dead.
- The car won’t start without a jump.
Common Causes
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The two most common issues that cause the BMW ABS pump to run constantly include the following:
- ABS Hydraulic Unit Failure
- Faulty ABS pump relay
Units often affected are Bosch 5.3, Bosch 5.4, and Bosch 5.7 ABS modules installed on several BMW cars, including 3-series, 5-series, 7-series, X3, X5, etc.
Troubleshooting with OBD-II scanner
You will need a BMW Scanner to read fault codes from the DSC and ABS module, such as the YOUCANIC Full System Scanner, to diagnose BMW ABS problems. This scanner can also diagnose every control module of your BMW vehicle, if it is supported.
Temporary Fix
If you are on a long road trip and are experiencing this problem, remove the ABS fuse so that you don’t burn the ABS motor or continue to drain your car battery.
Warning!
When the ABS fuse is removed, your ABS functionality will be disabled. Your vehicle may take longer to stop, and it can skid. Keep a more significant distance between you and the car in front.
Possible Solution
Replace the BMW ABS relay. The ABS relay costs less than $50 and is very easy to replace. The relay on most BMWs is in the fuse box located in the engine bay.
If the problem remains, you may need to replace or repair the ABS unit. Before replacing car parts, it is important to read the codes from your BMW.
Another option is to have the dealer replace the ABS hydraulic unit, which usually costs between $1000 to $2000.
Or remove your failed ABS pump & control module and send it for repair to shops specializing in repairing these ABS units. Look up these BMW ABS ATC Pump Module Repair services.
Check these troubleshooting and repair guides for more help on your BMW.
