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Juan Crespo
Juan Crespo, ASE Certified Technician
Category: Audi
Satisfied Customers: 1498
Experience:  A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
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Audi A8 Quattro L: I have a 2006 Audi A8L...brake pad light

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I have a 2006 Audi A8L...brake pad light came on....I had a brake shop replace the pad with factory Audi pads...light won't go off.....they ordered another set and still the light will not turn off.....can you help?



The 2006 Audi A8 employs two different strategies to detect critical brake pad wear; basically, those are wear sensors for the front (hydraulic calipers) and caliper opening in the rear (electro-mechanical calipers). Either front or rear brakes can trigger the warning light once a specific wear threshold is met.


The front pad replacement procedure is straight forward and has not changed much in years. Resetting the sensors is part of replacing front brake pads. The sensor is integrated into the pad, and is actually worn through by braking action. When the new pads go in, the new embedded sensor is plugged into the car, and off you go. If you just had front brakes put on, either they didn't plug in the sensor, or they didn't use the right pads and didn't have a sensor to plug in.


Rear pad replacement, however, now requires the use of a bi-directional scan tool to perform certain critical operations, one of which is to open the calipers for pad replacement. If you had your rear pads replaced and a mechanical device such as a "C" clamp was used to push the rear caliper pistons into their bore, the rear brake system is probably damaged.


Please let me know if you have additional questions or concerns regarding this issue.

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