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As of 2014, the cost for a Audi A4 brake light is between 12 and 15 dollars. This light can be purchased at stores like Auto Zone.
The brake light in the Audi A4 display means there is an issue with the brake system. The most common cause of this warning light is low brake fluid.
Replace the brake pads.
Faulty ABS unit .
Pull the carpeting behind the brake light. Unclip the assembly, replace bulb.
A bad brake sensor can cause the ESP light to stay on in an Audi. Other reasons the light stays on include a problem with the batter, loose clamp causing a leak in the intake, and worn brake pads.
This document by Shailesh Govekar explains in detail how to change a brake light bulb on a Audi TT Coupe 2005. http://www.interactioncenter.co.uk/Audi_TT_Coupe_2005.pdf Regards
You must look for a circular cover in the truck of the car on the other side of the break light. Remove the cover, unscrew the screw, don't drop the screw into the space. Then remove the outside light carriage.
You need a double element bulb.
My 99 Audi Quatro 4.2 A6 Avant has a recurring appearance of the ABS light & Brake Warning light. Any Suggestions?
to fix the problem in the brake system
Don't ignore the light. It's telling you to have the brakes inspected.