how to fix a sticking throttle in my BMW 3 Series F30/F31 (2012-2019)

Solution

1. Preparation

• Tools Required: Socket set, OBD-II scanner, cleaning spray (throttle body cleaner), soft cloth, safety goggles, gloves.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical issues.

2. Inspect and Clean Throttle Body

• Remove the air intake duct by loosening the clamps and disconnecting any sensors.
• Use the throttle body cleaner and a soft cloth to clean the inside of the throttle body. Pay special attention to the throttle plate and surrounding areas.
• Check for any signs of wear or damage to the throttle body gasket; replace if necessary.
• Reattach the air intake duct securely.

3. Check and Adjust Throttle Cable (if applicable)

• If your model has a throttle cable, inspect it for fraying or binding.
• Adjust the cable tension if it is too loose or too tight (consult service manual for specifications).
• If damaged, replace the throttle cable with a new one.

4. Reconnect Battery and Test

• Reconnect the battery terminals securely.
• Start the engine and allow it to idle for a few minutes.
• Test the throttle response by pressing the pedal gradually and observing the engine behavior.