The oil cooler adapter plate is defective the O ring is defective and leaks oil all over everything including wires. If your car doesn't have an external oil cooler, the plate, with the O ring seal will leak oil. The other side has two holes that can be machined for the external oil cooler, but if your car does not have that feature you will have oil leaks. Common oil leak on the V8 N62 and N62tu engines that would be in the E65 7 series and the X5 E53. This is the bearing block where the alternator mounts to. There is a gasket that develops a bad leak because of the seal failing. The seal has no use to the engine it is just there just in case if you get the oil cooling option and if you choose not to get the option your car will leak oil because the seal is not substantial and the oil has no where to go, so it leaks out of the gasket. The leak can be quite substantial.

- Birmingham, AL, USA