This brake caliper is designed for rear left placement on a Volkswagen Passat, Audi A4, or A6 with front-wheel drive. It includes a cast iron piston and a rust preventative finish. The caliper replaces OEM part numbers such as 8E0615423 and is manufactured in China. It is a single piston caliper suitable for non-performance applications, and it comes in a silver color. This product is not a vintage part and is not intended for universal fitment.