how to fix my BMW X5 F15 (2014-2019) that won't start at all

Solution

1. Preparation

• Tools Required: Multimeter, socket set, OBD-II scanner, jumper cables, basic hand tools.
• Safety Warnings: Disconnect the battery before starting any electrical work.

2. Battery Replacement (if necessary)

1. Remove the Battery:
   • Disconnect the negative terminal first, followed by the positive terminal.
   • Unbolt the battery tray and lift the battery out carefully.
2. Install New Battery:
   • Place the new battery in the tray.
   • Connect the positive terminal first, then the negative terminal.
   • Ensure all connections are tight and secure.

3. Starter Motor Replacement (if necessary)

1. Access the Starter Motor:
   • Raise the vehicle safely using jack stands.
   • Remove the undercarriage cover if applicable.
2. Disconnect Electrical Connections:
   • Unplug the electrical connector from the starter motor.
   • Remove the battery cable from the starter terminal.
3. Remove the Starter Motor:
   • Unbolt the starter motor from its mount using a socket set.
   • Carefully pull the starter motor out.
4. Install New Starter Motor:
   • Position the new starter motor and bolt it into place.
   • Reconnect the battery cable and electrical connector.

4. Fuel Pump Relay and Fuse Replacement (if necessary)

1. Locate the Fuel Pump Relay:
   • Refer to the owner's manual for the exact location of the fuel pump relay.
2. Test and Replace the Relay:
   • Remove the relay and test it with a multimeter; replace if defective.
3. Check and Replace Fuses:
   • Locate the fuse box and inspect the relevant fuses for the starting and fuel systems.
   • Replace any blown fuses with the correct amperage.