2002 NISSAN Altima QR20DE/KA24DE (L31)
L31 / Sedan / Coupe / North America / Japan / Select global markets
QR20DEKA24DEVQ35DEExact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Head gasket leaks on KA24DE under harsh conditions
- Timing chain stretch on early QR20DE versions
- Ignition coil failure on VQ35DE
First checks
- Inspect timing chain condition (QR20DE,VQ35DE)
- Check for coolant leaks around head gasket
- Verify transmission fluid level and condition
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
- Global market Altima variations mean engine and specification details can differ; North America favors KA24DE and VQ35DE engines, Japan and some Asian markets use QR20DE.
- Oil capacity and service interval vary slightly by engine and market; always consult specific service manual.