Vehicles using M274.920 engine list:

Engine M274.920

Symptoms:
- Rough idling and loss of power during acceleration
- Engine warning light (MIL) illumination
- Increased oil consumption and visible oil leaks
- Unusual noises such as ticking or knocking from the engine bay
- Reduced fuel efficiency and occasional misfires

Diagnosis:
- Inspect ignition coils and spark plugs for wear or failure, common in M274 engines
- Check for oil leaks around the valve cover gasket and turbocharger seals
- Perform a compression test to rule out cylinder wear or head gasket issues
- Scan for fault codes related to camshaft adjusters, turbocharger sensors, or fuel injectors
- Examine the timing chain and tensioner for signs of wear or slack, which can cause timing issues

Fixes:
- Replace faulty ignition coils and worn spark plugs to restore smooth combustion
- Renew valve cover gaskets and turbocharger seals to stop oil leaks
- Repair or replace the timing chain and tensioner if wear is detected to prevent engine damage
- Clean or replace fuel injectors to resolve misfire and improve fuel delivery
- Update engine control software if available to address known ECU-related issues

Prevention:
- Adhere to regular oil change intervals using manufacturer-recommended synthetic oil to prevent sludge buildup and protect turbocharger components
- Use high-quality fuel to reduce carbon deposits and maintain injector health
- Periodically inspect ignition components and replace spark plugs every 60,000 km or as specified
- Monitor for early signs of oil leaks and address them promptly to avoid engine damage
- Follow scheduled maintenance for timing chain inspection and replacement if necessary

By following these diagnostic steps and maintenance practices, owners of vehicles equipped with the M274.920 engine can minimize common issues and ensure reliable engine performance.