Why my BMW X3 wont start but has power?

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John C. February 9, 2021
The most common causes that hinders normal starting operation of Your BMW X3 are dead key fob battery, dead 12v battery, corrosion on battery terminals, bad alternator, clogged fuel filter, broken starter, blown fuse, empty gas tank, immobilizer error or any fault in the electrical system. A starter (also self-starter, cranking motor, or starter motor) is a device used to rotate (crank) an internal-combustion engine so as to initiate the engine's operation under its own power. Starters can be electric, pneumatic, or hydraulic.When the starter drive gear is worn out or not engaging properly, it will often produce a grinding noise. This is similar to the one that is heard if You start Your engine and then accidentally action the ignition switch again. If the grinding symptom is ignored, it may also result in damage to the engine flywheel.
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Juan K July 30, 2020
If a BMW X3 won't start and has power it is likely a problem with the starter motor.
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ronald penney December 28, 2023
Make sure to check the ground strap from engine to body. Chased this problem for two weeks and that was the problem
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