Vehicles using CZSA engine list:

Engine CZSA in the Audi A8 50 TFSI quattro (2019–present) is generally reliable but may face issues like carbon buildup on intake valves due to direct injection. Diagnosis includes rough idling or misfires; a professional inspection with a borescope can confirm deposits. Prevention involves using high-quality fuel and periodic intake cleaning. Another concern is the timing chain tensioner wear, causing rattling noises on cold starts; early diagnosis via sound inspection is key. Solutions include intake valve cleaning via walnut blasting and timely replacement of the timing chain tensioner to avoid severe engine damage. Regular oil changes with manufacturer-approved oil help maintain engine health.