2020 NISSAN Altima MR20DD/QR25DE (L33)
L33 / Sedan / North America, select global markets
MR20DDQR25DEVC-Turbo (variable compression engine code VC-T)Exact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Occasional CVT transmission issues reported in some markets
- Variable compression engine complexity requires attentive maintenance
First checks
- Inspect CVT fluid condition and level
- Check for unusual engine noises given new VC-Turbo technology
Before replacing parts
- 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 exist: MR20DD primarily in Asian markets, QR25DE mostly in earlier US models; 2020 mainly replaced by VC-T 2.0L in North America.
- VC-Turbo engine is a significant innovation with variable compression ratios enhancing efficiency and power.