2017 NISSAN Altima QR25DE/VQ35DE (L33)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• CVT transmission issues reported in some North American models
• Timing chain tensioner noise in higher mileage QR25DE engines

First checks

• Check CVT fluid condition and level
• Inspect timing chain and guides for noise/failure
• Verify spark plug condition

Vor dem Teiletausch

• Save fault codes and freeze-frame data before clearing anything.
• Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
• Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.

Important notes

• Market variations affect available engines; VQ35DE V6 widely available in North America, MR20DD 2.0L engine common in Asia.
• Oil capacity and specifications depend on engine; always confirm exact variant for service.