What to Do When the BMW 5 Series Auto Hold Fails?
2 Answers
Solutions for BMW 5 Series auto hold failure: 1. Safely park the vehicle and restart it to see if the function can be restored; 2. Reprogram the EMF control module; 3. Check based on the fault codes—if the parking servo motor fault code is reported, inspect the parking servo motor and its circuit; 4. If there are no fault codes, examine the entire related circuit; 5. If no issues are found, consider replacing the EMF module and inspecting other control systems. The BMW 5 Series has dimensions of 5106mm in length, 1868mm in width, and 1500mm in height, with a wheelbase of 3105mm, and features a front-engine, rear-wheel-drive layout. It is equipped with a 2.0T turbocharged engine paired with an 8-speed automatic transmission, delivering a maximum power of 135kW and a maximum torque of 290Nm.
Last time I drove my friend's 5 Series, I encountered a similar situation. When stopping at a traffic light with the brake pedal fully depressed, I noticed the auto-hold didn't respond, and a yellow warning icon popped up on the dashboard. Later at the dealership, the technician mentioned that this is mostly caused by wheel speed sensors being clogged with mud, especially after rain or snow when slush thrown up by the rear wheels can block the sensor ports. Another possibility is that if you've just replaced the brake pads but didn't perform the electronic parking brake reset procedure, the system might still be in protection mode. Additionally, if the battery charge drops below a certain threshold, the auto-hold function may be temporarily disabled. It's recommended to first clean the sensors on the inner side of all four tires, then try pressing the brake pedal firmly twice after a cold start. If that doesn't work, you'll need to read the fault codes.