EGR VALVE FOR OPEL TIGRA VECTRA/B/Hatchback VAUXHALL X 14 XE 1.4L 4cyl 1.4L 4cyl. Elstock 72-0037 Agr Valve For Opel Vauxhall. Please check your vehicle against our compatibility list. There could also be blue / black smoke coming from your exhaust and poor fuel economy.