Is the Abnormal Noise from Audi A6L's Electronic Handbrake Normal?
2 Answers
Audi A6L's electronic handbrake producing abnormal noise is not normal and requires timely inspection and repair, otherwise it will affect the normal use of the vehicle. Meaning of brake pads: Automobile brake pads, also known as automobile brake linings, refer to the friction materials fixed on the brake drum or brake disc rotating with the wheel. The friction linings and friction blocks within them bear external pressure to generate friction, thereby achieving vehicle deceleration. Composition of the braking system: The braking system consists of the control system, hydraulic system, and power assist system. The control system includes components such as the pedal and handbrake. The hydraulic system is composed of hydraulic oil, brake pump, and hydraulic oil pipes. The power assist system is the vacuum booster pump. The electronic control system consists of the ABS pump, ABS sensors, and ABS computer. The execution system includes the brake caliper, brake pads, and brake disc.
Having run an auto repair shop for over a decade, I can say that the abnormal noise from an Audi A6L's electronic parking brake depends on specific circumstances. A slight humming sound from the motor when engaging the parking brake is normal—that's just the gears meshing. However, if there's a harsh metallic scraping or squeaking noise, that indicates a problem. It's often due to a deformed brake pad return spring or lack of lubrication in the rear caliper guide rails. Just the other day, I fixed one where the noise was caused by the spring plate rubbing against the brake disc. Another common issue is rust in the parking brake module due to water ingress, especially noticeable after car washes. I recommend recording the noise for a professional mechanic to assess. If necessary, the tires should be removed for inspection—don't wait until the sensor wiring harness gets damaged before fixing it.
