Welcome to Discount Ac Parts. Clutch Master Cylinder For BMW 318is M3 318ti 328i Z3. INTERCHANGES WITH THE FOLLOWING PART NUMBERS.ET-K1712 AN, ET-K1712AN, 20559818-101, 20616217-101, 21526758829. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Transmission & Drivetrain\Clutch Parts & Kits\Additional Clutch Parts". The seller is "bapperformance" and is located in this country: US. This item can be shipped worldwide.