Powerflex Polyurethane Bush kit for Ford Mondeo (2000 to 2007) Rear Subframe Mounting Bushes - PFR19-910BLK - This bush fits saloon and hatch models only NOT ESTATE VERSIONS. OE Numbers 1S71-5K817-AC - 1S71-5K818-AC - 1404976 - 1404977. - The rear subframe is held to the body with 4 rubber bushes, these bushes fail making the rear subframe to come away from the body, this causes knocking from the rear and is an MOT failure. PFR19-910 are an easy to fit reliable fix to this problem. - Bush Size: - PRICE IS PER CAR KIT, NOT per bush. Powerflex usually price their bushes singly, but we have combined the QTY and price to keep it simple for you!