Question about 2004 Audi A4
My 2004 A4 brake lights (left, right, and center) turn on after the vehicle has been parked (appx. 3 hours or so) for the evening. I have to enter the vehicle, crank the ignition, and pump the brake pedal until the brake lights turn off. This could happen 2-3 times a night, and appears to occur more frequently in colder weather. I also notice that the brake application sensor - located to the immediate left of the shift lever - is sometimes NOT illuminated when the car is in PARK. The aforementioned sensor DOES illuminate only after pumping the brake pedal. Also, the right brake light fails intermittently (immediately on start up and also at times while driving). This problem sometimes resolves, if you turn off the ignition and turn it back on again.
Sounds like your brake light switch is on its way out. Its a simple fix and a cheap part. It will need to be done immediately as not only can the lights staying on drain your battery but it can also cause lack of power and not put the brake lights on when braking. The switch is operated by the pedal itself and requires the drivers underdash trim to be removed. With this off the switch can be accessed and replaced. If you can get a vehicle technician to fit it, do so, as they are quite fragile and new switches can become useless if fitted incorrectly. Good luck
Posted on Feb 09, 2009
This is the Brake Switch which is located under the steering wheel.You have to remove the panel to replace it. I had the same problem on my 2004 A4 Convertible.
Posted on Feb 26, 2009
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