what causes my BMW 3 Series to hesitate when accelerating

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Clean or Replace the Throttle Body

• Remove the air intake duct connected to the throttle body.
• Use a throttle body cleaner and a soft cloth to clean carbon deposits from the throttle body.
• If heavily damaged, replace the throttle body with a new unit.
• Reattach the air intake duct securely.

3. Inspect and Replace Ignition Components

• Remove the engine cover (if applicable) to access the ignition coils.
• Disconnect the electrical connectors from each ignition coil.
• Unscrew and remove the ignition coils; inspect for cracks or carbon tracking.
• Replace any faulty ignition coils and ensure new spark plugs are installed if necessary.
• Reconnect the electrical connectors and reinstall the engine cover.

4. Clean or Replace the MAF Sensor

• Locate the MAF sensor in the air intake duct.
• Disconnect the electrical connector from the MAF sensor.
• Remove the MAF sensor from the duct.
• Use MAF sensor cleaner to clean the sensor element carefully.
• Reinstall the MAF sensor and reconnect the electrical connector.