D3 Rear Pad replacement

[PsYcHe]

Guys,

Probably just being thick here..

But when replacing the D3 pads and putting the new thickness into VCDS, what thickness to I use, the width of 1 pad, or both together?

[A8L Chick]

If you cycle the handbrake (as you should do) you shouldn't need to enter a value. But the thickness is of 1 pad.

[PsYcHe]

Ty Bex.. Thought it was.

[A8L Chick]

Originally Posted by PsYcHe

Ty Bex.. Thought it was.

No problemo dear

[47p2]

Sorry to drag up an old thread but better this than starting a new one on the same subject.


When putting in the pad thickness am I correct in thinking it is the thickness of the Ferodo material that is entered and not the material and the metal backing

[PsYcHe]

It is Though other brake pads are available

[47p2]

Thanks, thought I should double check

[snapdragon]

I would be interested in your measurement, mine were 12mm, genuine Audi pads, which seemed a bit low for new ones.
The range you can enter is 10-23mm.
I think these measurements are needed for calculating when the wear sensor comes on.

[Godders]

Originally Posted by snapdragon

I think these measurements are needed for calculating when the wear sensor comes on.

It uses the measurement and the known travel for each rotation of the stepper motor in the caliper. Every few hundred miles once you stop, exit and lock the car, provided you've left the handbrake off (level surface and in Park) the caliper will cycle the pad in a nd out to check the remaining pad material.

Excerpt taken from an Audi SSP (translated from German so doesn't read too well) :

"Brake pad wear detection and correction clearance
The pad thickness is cycled (every 500 km) when the vehicle is stationary and parking brake is not actuated. It is designed to automatically cycle the brake pad from the zero position (= position in final position) against the brake disc down. The control unit determines from the Hall sensor the measured value from running the brake lining and it can calculate the pad thickness.The measurement takes place when the vehicle is parked,Ignition switch and parking brake is not closed.If a driver uses the parking brake regularly,the wear measurement maybe less accurate than for rarely usedParking brake."

So if you're leaving your car on a level surface leave the handbrake off occasionally.

[47p2]

Originally Posted by snapdragon

I would be interested in your measurement....

Hoping to do mine tomorrow if all goes to plan and will let you know the measurement.


Thanks for the info Gooders, interesting read