my BMW X3 G01 (2018-2024) has engine stalling issues when idling

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to ensure safety.

2. Clean Throttle Body

• Remove the air intake duct connected to the throttle body using a socket set.
• Use throttle body cleaner and a soft cloth to clean the throttle plate and surrounding areas.
• Reattach the air intake duct and ensure all clamps are secure.

3. Inspect and Clean the Idle Air Control Valve (IACV)

• Locate the IACV, typically mounted on or near the throttle body.
• Detach any electrical connectors and remove the IACV using a socket set.
• Clean the IACV with appropriate cleaner and inspect for wear.
• Reinstall the IACV and reconnect electrical connectors.

4. Test and Adjust Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail's test port.
• Turn the ignition to the "ON" position (do not start) to check fuel pressure.
• If the pressure is below specifications, inspect the fuel pump and filter for clogs or failures.

5. Inspect Vacuum Lines

• Visually inspect all vacuum lines for cracks, breaks, or disconnections.
• Replace any damaged vacuum hoses with new ones.
• Ensure all connections are tight to prevent vacuum leaks.

6. Check Spark Plugs and Ignition Coils

• Remove the ignition coils using a socket set.
• Inspect the spark plugs for wear or fouling; replace if necessary.
• Reinstall the ignition coils, ensuring they are seated properly.