Fault Description: BMW Mk100 ABS Pump Hydraulic Unit Failure
Fault Codes: The following fault codes may be logged in the ABS system:
1. 5DF0 – Hydraulic Unit Pump Motor
2. 5DF1 – Hydraulic Unit Pump Motor Connector
3. 5DF2 – Hydraulic Unit Pump Motor Supply Voltage
4. 5DF3 – Hydraulic Unit Pump Motor Communication Fault
Affected Vehicles and Production Years: The BMW Mk100 ABS pump is commonly fitted to various BMW models, including, but not limited to:
1. BMW 1 Series (E81, E82, E87, E88) – Production years: 2004-2013
2. BMW 3 Series (E90, E91, E92, E93) – Production years: 2005-2013
3. BMW 5 Series (E60, E61) – Production years: 2003-2010
4. BMW X1 (E84) – Production years: 2009-2015
5. BMW X3 (E83) – Production years: 2004-2010
6. BMW X5 (E70) – Production years: 2006-2013
7. BMW Z4 (E89) – Production years: 2009-2016
Description:
The BMW Mk100 ABS pump is an integral part of the Anti-Lock Braking System (ABS) that helps prevent wheel lock-up during sudden braking or on slippery surfaces. It consists of a hydraulic unit with a pump motor and various sensors to monitor wheel speed and detect potential wheel lock.
One common fault that can occur with the Mk100 ABS pump is a failure in the hydraulic unit, particularly related to the pump motor. This failure can result in various ABS-related issues, such as ABS warning lights on the dashboard, loss of ABS functionality, or compromised braking performance.
When the ABS system detects a fault within the Mk100 ABS pump hydraulic unit, it may log one or more of the above-mentioned fault codes to indicate the specific issue. The fault codes “5DF0,” “5DF1,” “5DF2,” and “5DF3” typically point to problems with the hydraulic unit pump motor, its connector, supply voltage, or communication with other components.
Additionally, internal component failures within the BMW Mk100 ABS module can cause brake callipers to bind or even be completely inoperable. The ABS module may store fault codes internally relating to DSC adjustment or even water in brake fluid.
Part numbers of affected Mk100 ABS modules include:
34516868645 / 34516870919 / 34516875817 / 34516871113 / 34516881174 / 34516875562 / 34516887744 / 34516887513 / 34516891615