OKAY MOTOR Secondary Air Pump for A6 Quattro VW Passat Golf Jetta EuroVan T4 VR6 Cabrio III Smog Air Injection Pump Fits A6 Quattro VW Passat Transporter 2.8L OEM: 078906601A, 078906601E, 021959253B, 078906601B New aftermarket replacement unit 180-days Manufacturer Type warranty limited; Application Guide: VW PASSAT III & IV Variant, VW TRANSPORTER IV Autobus; VW TRANSPORTER IV Camionnette; A6 C4