2011 NISSAN Sentra MR20DE/QG18DE (B16)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Some reports of CVT transmission issues in other model years, less common in 2011.
• Timing chain stretch possible but generally reliable.

First checks

• Inspect timing chain tension and noise.
• Check for oil leaks around valve cover gasket.

Antes de cambiar piezas

• 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

• North American market primarily uses MR20DE 2.0L engine; global markets including Latin America and Asia often had QG18DE 1.8L.
• Oil capacity includes filter replacement, figure may slightly vary by market-specific model and engine.