why does my BMW 5 Series F10/F11 (2010-2017) feel sluggish when accelerating

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool down before starting work.

2. Clean or Replace Air Filter

• Tools Required: Screwdriver set, replacement air filter
• Remove the air filter housing cover using the appropriate screwdriver.
• Take out the old air filter and inspect it; replace with a new one if it's dirty.
• Reassemble the air filter housing.

3. Inspect and Clean Throttle Body

• Tools Required: Throttle body cleaner, soft cloth, socket set
• Remove the intake duct connected to the throttle body.
• Use throttle body cleaner to spray the throttle plate and surrounding area.
• Gently scrub with a soft cloth to remove carbon buildup.
• Reattach the intake duct securely.

4. Check and Replace Spark Plugs (if necessary)

• Tools Required: Spark plug socket, torque wrench
• Remove the ignition coils by unscrewing them from the cylinder head.
• Take out the spark plugs using the spark plug socket.
• Inspect the condition; if they show signs of wear, replace them with new plugs.
• Torque the new spark plugs to the manufacturer's specification (typically around 15-20 Nm).
• Reinstall the ignition coils.

5. Inspect Fuel System

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position (do not start the engine) and check the pressure reading against specifications.
• If the pressure is low, consider replacing the fuel filter or testing the fuel pump.