2026-10-08 · 5 min read
Nissan Almera O2 Sensor Malaysia
Almera O2 sensors: upstream (air-fuel ratio sensor) and downstream (catalyst monitor). VG20 (B17): upstream sensor replacement. HR10DDT (N18): wideband lambda sensor — OEM quality recommended, aftermarket may cause fuel trim issues. Common codes: P0135 (sensor heater), P0420 (catalyst efficiency — often the downstream sensor). Malaysia RON95 causes more deposit buildup than premium fuel — inspect sensors at 20,000 km.
Almera Oxygen Sensor
- N18 HR10DDT: upstream O2 sensor (pre-cat) and downstream O2 sensor — both affect fuel trim
- Failing O2 sensor: poor fuel economy, rough idle, CEL with P0130–P0167 codes
- Typical lifespan: 80,000–120,000 km; replace if sending false readings
- Use Denso or NGK sensors — Nissan-compatible OEM brands