High pressure fuel pump O-seal for all 2.0L TFSI engines Should be replaced with each removal or mounting of the high pressure pump with to avoid leaks. In the worst case, the pump will leak and the rail pressure will collapse. Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com