my BMW X5 G05 (2019-2024) won’t start but the battery is fine, what now

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is in a safe and well-ventilated area.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect the Fuel System

1. Check Fuel Pump Relay:

   • Locate the fuel pump relay in the fuse box.
   • Remove the relay and test it with a multimeter for continuity.
   • If faulty, replace the relay.

2. Test Fuel Pressure:

   • Connect a fuel pressure gauge to the fuel rail.
   • Turn the ignition to the "ON" position without starting the engine.
   • Check that fuel pressure is within the manufacturer's specifications.
   • If pressure is low, inspect the fuel filter and pump for blockages or failure.

3. Check the Ignition System

1. Inspect Spark Plugs:

   • Remove the spark plugs using a socket wrench.
   • Inspect for wear, carbon buildup, or damage.
   • Replace any faulty spark plugs with OEM parts.

2. Test Ignition Coils:

   • Remove the ignition coils and test them with a multimeter.
   • Replace any coils that do not measure within the specified resistance range.

4. Inspect Starter System

1. Test the Starter Motor:

   • Locate the starter motor under the vehicle.
   • Use a multimeter to check for voltage at the starter terminal when attempting to start the engine.
   • If there is no voltage, trace back to the ignition switch or starter relay.

2. Replace Starter Motor (if faulty):

   • Disconnect wiring and remove the starter motor.
   • Install a new starter motor and reconnect wiring securely.