Hi there,
Over the years i've played with the suspension air pump a few times. Got a bagpipe any kit early on and got a good 2-3 years from it - so this route is still recommended if you have an early issue, working but a bit slow. A second kit didn't do so much and a 2nd hand pump lasted a year or so and well, i was at the low end of a bumpy ride
Given that i was VERY impressed with the Chinese EPB calliper kit that instantly sorted my EPB issues for a very sensible price, i thought why not risk an air pump.
Very well packaged, with relay and it all looks great, there's the odd minor cosmetic difference between the OEM one, but fitted fine and the car is performing better than ever with it, so i thought I'd make a note here - ~£150 delivered is small beer compared with Audi and it makes second hand ones look expensive. It IS early days, but the initial impression is that I'm impressed.
speedinguys
https://www.ebay.co.uk/itm/293061013398