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Message: <blockquote data-quote="pussy" data-source="post: 201751" data-attributes="member: 60">My dear Lionel.. maybe should correct your statement..  if the car is a 520 M50B20TU local spec, then the runing management is siemens, not bosch.. the wiring harness can't be used back, even if the car is M50B20, the wiring harness still can't be used..even the sensors are different.. as for the lights warning on the check control panel, the swap was not done properly, hence the warning light, so the wiring is wrong, cos all B20M50 engine cars never came with check control only the b25 engines. to correct it, u need the half car wiring to plug back, so is the rear harness.. regards.</blockquote>