what to do if my BMW 3 Series F30/F31 (2012-2019) stalls while driving

Solution

1. Preparation

• Gather tools and ensure the vehicle is parked on a level surface.
• Disconnect the battery to prevent electrical shorts.
• Tools Required: OBD-II scanner, socket set, multimeter, cleaning supplies.

2. Address Fuel System Issues

• Fuel Pump and Filter Inspection:

  1. Locate the fuel pump (usually in the fuel tank).
  2. Disconnect the fuel lines carefully.
  3. Remove the fuel pump assembly and inspect the filter for clogs.
  4. Replace the fuel filter if it is dirty.

• Fuel Injector Cleaning:

  1. Use a fuel injector cleaning kit to clean injectors.
  2. Follow the manufacturer's instructions for the cleaning procedure.

3. Electrical System Check

• Battery and Alternator Testing:
  1. Use a multimeter to check battery voltage; it should be around 12.6 volts with the engine off.
  2. Start the engine and check voltage again; it should be between 13.7 to 14.7 volts.
  3. Replace the battery or alternator if they are out of spec.

4. Clean Air Intake Components

• Throttle Body and MAF Sensor Cleaning:
  1. Remove the air intake duct to access the throttle body.
  2. Clean the throttle body using throttle body cleaner and a soft cloth.
  3. Disconnect the MAF sensor and clean it with MAF sensor cleaner.

5. Reconnect and Test

• Reconnect the battery.
• Start the engine and monitor its operation.
• Conduct a test drive to ensure the stalling issue has been resolved.