What Are the Factors Leading to Electronic Parking Brake Failure in European Cars

Nowadays, all the modern European cars are coming equipped with electronic parking brake (EPB) systems that are very efficient in comparison to the traditional parking brakes fitted in cars earlier. However, the electronic parking brake failure is a common issue associated with luxury cars.

In fact, there are certain factors that lead to electronic parking brake failure in high-end cars, and if you are aware of these problems, then you can address them effectively. In this article, we will discuss the leading factors associated with electronic parking brake failure in European cars.

Factors Behind EPB Failure

Malfunctioning Electrical Connectors

The electronic parking brake is heavily reliant on a stable electrical connection for its optimal functioning. Most of the time, it is seen that communication problems between the switch, control module, wiring harness, and rear caliper actuators lead to erratic functioning of the electrical connectors.

Now, the malfunctioning of the electrical connectors is often related to corroded connectors and loose contacts, which the system interprets as an open circuit or missing actuator, and leads to EPB failure in European cars. The majority of the time, drivers report terminal corrosion as the major reason behind intermittent failure of the EPB in their vehicle.

In addition to that, blown fuses or relay faults can adversely affect the functioning of the electronic parking brake by cutting power to the brake system. Furthermore, voltage fluctuations due to underlying battery or alternator problems can damage the EPB control modules.

Failing Actuator Motor

The actuator motor is one of the most critical components of the electronic parking brake system, as it is responsible for physically engaging and releasing the brake mechanism. In the majority of European cars, the actuator motor is mounted directly onto the rear brake caliper, which makes it prone to constant heat, moisture, road debris, and salt contamination.

Over the years, as your vehicle gains miles, the internal gears and electrical components are subject to continuous operation and exposure to environmental elements. Whenever the EPB fails, you are going to experience grinding or clicking sounds when you try to operate the parking brake.

In addition to that, the internal gear wear from repeated usage often leads to the rear wheels locking up unexpectedly, which can make it very dangerous for you to drive your vehicle. That is why it is very important to get in touch with a certified auto repair shop the moment you notice anything is off with the electronic parking brake of your vehicle.

EPB Control Module Failure

The electronic parking brake control module is the nerve center of your entire parking brake system. In fact, the EPB control module helps in processing the driver’s commands and communicates with the other braking systems, like ABS, traction control, and stability control.

Most of the time, it is seen that when the module develops an internal failure, the electronic parking brake system completely stops working. At times, water intrusion into the system and voltage spikes are the root cause behind the problem; however, the issue might also be caused by overheating, software glitches, and internal circuit failure in your European car.

Due to the EPB control module failure in your European car, you are going to encounter complete parking brake failure, and you will notice that the brakes are unable to release when you deactivate the system. Along with that, you will observe that the brake warning lights are consistently illuminated on the dashboard of your car.

Seized Rear Brake Caliper

There are many European cars that integrate the electronic actuator of their electronic parking brake directly into the rear brake caliper assembly. Now, over the years, due to rust buildup or moisture contamination, the caliper piston or slide pins begin to seize up, and this is when the actuator motor experiences excessive strain when you try to apply or release the brake.

In fact, torn rubber dust boots and a lack of proper lubrication are also leading reasons behind a seized rear brake caliper in your high-end vehicle. Upon inspection of your braking system, you are going to come across uneven brake pad wear, a burning smell from the brakes, and an increase in fuel consumption from your vehicle.

Finally

These are some of the leading factors behind electronic parking brake failure in your high-end European car. At times, drivers tend to ignore the initial symptoms, which only complicates the problem in the long run. The moment you experience erratic functioning of the EPB, you must get your vehicle inspected and fixed quickly.

Nikolas Motorsports located in Pontiac, MI is a leading independent auto repair and maintenance facility that specializes in BMW, Mini, and Porsche. We have years of experience in looking after these high-end German cars.