BMW Genuine O-Ring for Intake Manifold Adjusting Unit (DISA Valve) 75 X 2.5 mm for 318i 318is 318ti Z3 1.9 BMW Genuine O-Ring for Intake Manifold Adjusting Unit (DISA Valve) 75 X 2.5 mm Please see Product Description below for vehicle compatibility. Manufacturer Warranty: 24000 miles or 2 years Quantity within package: 1