Audi TT


The brake pedal switch is the part responsible for indicating to the control that we are using the brake pedal, and among other things, is responsible for turning on the brake lights.

There are many comments on the fragility of this piece, indicating that it is not uncommon to spoil. If you are just breaking, the unit may record the following error (in my case are those that were recorded):

Address 01     -------------------------------------------------------
   Controller: 8N0 906 018 DA
   Component: 1.8L R4/5VT     G   0010
   Coding: 11500
   Shop #: WSC 00001
   TRUZZZ8NX61008312     AUZ5Z0F1076020
1 Fault Found:
16955 - Brake Switch (F): Implausible Signal
            P0571 - 35-10 - - - Intermittent
Readiness: 0000 0000

Address 03     -------------------------------------------------------
   Controller: 8N0 907 379 J 
   Component: ESP FRONT MK60      0101
   Coding: 0019469
   Shop #: WSC 01236
1 Faults Found:
00526 - Brake Light Switch-F
            008 - Implausible Signal - Intermittent

The first error corresponds to the motor module, while the second corresponds to the module brakes (ABS / ESP).

In my case, when there was the breaking of this piece, was performing an overtaking, and caused the car to stop accelerating. This is because the unit was receiving conflicting information (that was pressing the brake pedal and the accelerator at the same time), and to protect the engine and brakes disables the accelerator pedal, allowing not accelerate. finally records the failure and allows re-accelerate.

It is possible that the fault is therefore recorded in two different modules (engine and brakes).

The original switch, AUDI purchased, is as follows:



Most of these parts can be found on-line stores on the internet, such as : Oscaro




To change the switch, you have to remove the plastic bottom of the dashboard.

To remove this protective és necessary:

- Turn off the light switch. To this end it is necessary to press the switch inward light, and rotate it.

- Remove the 3 lower screws.

- Remove the screws of the piece where the fuses, in order to avert the pins that are inserted into the protector.

- Release the clips on the top of the guard.

- Finally, get the diagnostic connector.

After removing the guard, we have seen the brake pedal switch.

To remove it, you have to turn it about 45 degrees counterclockwise.

We already removed the old switch.

And here we see the old and the new.

To fit the new, without touching the brake pedal (must be in the position of "rest"), insert and rotate 45 ° clockwise.

IMPORTANT NOTE: The switch has a locking mechanism that is activated when installed. If you later need to remove it, will have to unlock the mechanism.

We see images of the new switch installed.

Finally, remount the lower guard.

Work done by: