Audi 4000 Quattro Window Regulator | Auto Parts Warehouse We know car parts and we know auto parts. We're here to help you find that perfect Window Regulator for your Audi 4000 Quattro. We love when auto parts experts come to our site and we love when car parts newbies come to our site. We have worked hard to design a site that caters to everyones Audi 4000 Quattro Window Regulator needs. 1987 Audi 4000 Window Components - CARiD Broken cables and pulleys, worn hinges and wheels, no matter what type of regulator glitch you have in your 1987 Audi 4000, we have the replacement window components.