Brake servo help required.

4v6 · 18-08-11, 09:11 AM

Ok ive been playing with a couple of options for a brake servo on the quattro.

The orginal coupe gt servo isnt any use as the master cylinders are lovely nla again plus its a little smaller than id like.
I have a spare servo from an audi 80, dont know the year precisely but 1986 is looking around right, part number is 811 612 105 AE and ive modified the threaded rod (shortened it) and got the correct length to enable it to just slot nicely in.

However, im struggling to find a part number for the brake master cylinder as the one it has already has no part number.

Can anyone backcheck the servo part number for me to identify the car and hence the brake master part number i need to go with it?

Thank you!

Phil Payne · 18-08-11, 09:42 AM

Quote:

Originally Posted by 4v6

.. part number is 811 612 105 AE ...

ETKA doesn't seem to know any variant of the 105 part number for a Type 81. All brake servos seem to be 107.

811 216 107B is a valid number, though.

4v6 · 18-08-11, 10:36 AM

Quote:

Originally Posted by Phil Payne

ETKA doesn't seem to know any variant of the 105 part number for a Type 81. All brake servos seem to be 107.

811 216 107B is a valid number, though.

Thanks Phil, original part number is correct tho.

Apparently fits passats, 100's 80's and 90's from 1.6 to 2.2 litre capacity.
Located the part number for the master and its still available so one of those is on the agenda next.