why does my BMW X5 F15 (2014-2019) have rough idle when stopped

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety during the process.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Spark Plugs

1. Remove the engine cover (if applicable) using a socket set.
2. Disconnect the ignition coil connectors.
3. Remove the ignition coils using a socket wrench.
4. Extract the spark plugs using a spark plug socket.
5. Inspect the spark plugs for wear and carbon buildup; replace if necessary.
6. Install new spark plugs, ensuring they are gapped correctly (typically 0.032 inches for BMW).
7. Reinstall the ignition coils and connect the connectors.

3. Check and Replace Throttle Position Sensor

1. Locate the throttle body and throttle position sensor.
2. Disconnect the electrical connector from the throttle position sensor.
3. Remove the screws securing the throttle position sensor to the throttle body.
4. Install the new throttle position sensor and secure it with screws.
5. Reconnect the electrical connector.

4. Inspect and Repair Vacuum Leaks

1. Visually inspect all vacuum hoses for cracks or disconnections.
2. Use a smoke machine or carburetor cleaner to check for leaks in the intake manifold and vacuum lines.
3. Replace any damaged vacuum hoses found during inspection.

5. Final Assembly

• Reinstall any removed engine covers or components.
• Reconnect the battery and ensure all connections are secure.