208: BMW X5 No Start After Engine Swap
About this episode
A challenging diagnostic case involving a 2012 BMW X5 that wouldn't start after an engine swap is dissected in detail. The host walks through troubleshooting relay control issues linked to the DME (engine control module), uncovering a short to ground caused by a faulty aftermarket ignition coil. Despite initial confusion and multiple code resets, collaboration with BMW experts and thorough testing led to identifying a blown internal fuse in the ISM relay unit. The episode highlights the complexity of modern BMW electrical systems, the importance of proper parts, and the value of expert advice and persistence.
Today on the show I'm sharing a case study on a 2012 BMW X5 that cranks but does not start after the engine was swapped. The vehicle was purchased from the auction with a blown motor and sat for year before the shop got around to replacing the engine.
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