Some BMW 525i owners report experiencing power loss due to fuel delivery issues and problems with crankshaft and camshaft sensors. These fuel delivery problems can stem from faulty fuel injectors, air flow sensors, or throttle bodies, which disrupt the air/fuel ratio. Additionally, early fuel pump failures have been noted in certain BMW models, contributing to this power loss. Furthermore, if the crankshaft or camshaft sensors fail, the engine control unit (ECU) may lose critical timing information, leading to reduced power mode. Symptoms of these sensor issues can include difficulty starting the car or intermittent stalling. Prompt diagnosis and replacement of faulty components are essential for restoring the power and performance of the BMW 525i.
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