1st gen MINIs had issues where the rear washer would weep leaving a trail of washer fldui down the boot. This check valve, MINI part # 61-68-8-229-249 is the supposed fix for that issue. While looking for something else today I found this in a drawer. It has been there for 5 years at least, well, save for the time it was packed in a box while moving. I don't have a rear washer, I don't need this. MSRP is like $5.25 for this thing. You can have it. But if you want to make a donation to M/A ([email protected]) I won't complain. The price of $0.00 includes shipping in the US.