Disa diaphragm for engines: M52TU, M54, M56 engines New membrane for the disa actuator assembly in the intake manifold geometry adjustment system. The disa flap is installed on the intake manifold above the throttle valve. The most common failure of the disa system in vehicles occurs when the vacuum valve diaphragm, which controls the flap, tears. We offer a solution to this problem—just the disa diaphragm as a separate part. The diaphragm must be selected based on the original part number of the disa unit, as the diaphragm is not sold separately by the manufacturer! Original Disa part numbers for engines M52TU, M54, M56 with displacements of 2.0, 2.2, 2.3, 2.5, 2.8, 3.0: - 11617502275 - 11617544805 - 11617502269 - 11617544806 - 11611440049 The diaphragm is slightly thicker than the original to extend its service life. Compatible with the following models: - 3 Series E46 - 5 Series E39, E60 530 M54 - 7 Series E65 E66 730 M54 - X3 E83 3.0i - X5 E53 3.0i - Z3 M54 3.0i, Z4 M54 3.0i Package Includes: 1*disa diaphragm