Brake master cylinder 7A 90

[Jamin]

Yes, that's the one I bought. Car parts for less is ECPs online only sales site that's much cheaper.

I did read that ECPs supplier Pagid is the uk supplier for "ATE aftermarket". The part number matches the genuine ATE part, but doesn't state LHD only. That pretty much confirms that there is no difference and it's probably to do with a sales territory agreement on who supplies the RHD market.


TeXerv on Classic Audi gives a good post mortem on why they fail: http://www.classic-audi.co.uk/forum/...49&postcount=9

[John.]

Yes, that's the one I bought. Car parts for less is ECPs online only sales site that's much cheaper.

I did read that ECPs supplier Pagid is the uk supplier for "ATE aftermarket". The part number matches the genuine ATE part, but doesn't state LHD only. That pretty much confirms that there is no difference and it's probably to do with a sales territory agreement on who supplies the RHD market.


TeXerv on Classic Audi gives a good post mortem on why they fail: http://www.classic-audi.co.uk/forum/...49&postcount=9

That's good to know.

[Jamin]

Follow up

Eventually, a master cylinder arrived. This one is cast iron and can be disassembled:




A post mortem on the original ATE master cylinder shows corrosion at the rear where moisture had settled at the lowest point:



and the rear seal showing evidence of being rolled over itself which is the probable cause of the brakes sticking on:



So change your brake fluid every two years like you are supposed to do