I REBUILT MY WRECKED BMW M5 NOW I HAVE TO TAKE IT BACK TO BMW

This video follows Mat Armstrong as he completes a meticulous rebuild of a badly crashed BMW M5 Competition and then confronts an unexpected setback that forces a return to BMW. The episode opens with him detailing the decision to finish the rebuild and drive the car, but reveals an early hurdle: the car relies on a lithium battery that is costly and stubbornly flat. He explains the workaround using a lead acid battery and a battery pack to get the car to power up enough to test the systems, only to discover that it cannot sustain revs or charge normally, ultimately leading to him ordering a brand new lithium battery from BMW. The narrative then shifts to the physical reassembly, where he focuses on installing the front end components, wings, arch linings, and bumper, while troubleshooting loom connections and sensors that could affect features like parking sensors and adaptive cruise control. As parts arrive, he inspects wiring, cameras, and sensors, making judgments about which items are essential for the road and which could be sold or deferred. A recurring challenge is the airbag system, where the knee airbag and driver resistance present a fault that BMW should validate, pushing the car closer to a return visit while also testing the car’s readiness for road use and dyno work. The build advances with a mix of caution and ambition, including new alloys, a carbon fiber steering wheel, and a plan to tune the car for substantial power gains, all while addressing issues such as limp mode caused by exhaust restrictions and the need for proper ECU calibration. The culminating moments show a dramatic power increase after tuning, intent on pushing the car toward a credible, road-worthy finish, and a final reckoning on whether the total outlay and time invested were worth the thrill of achieving a high performance restomod. The video closes with reflection on the journey, the costs, and the decision to pursue a return to BMW for a fault check and airbag test, underscoring the ongoing complexities of restoring a high performance car born from a salvage scenario.

Topics · autos_vehicles · car_restoration · car_modification · diy_build · dyno_tuning