Parts for your 2011 Nissan Serena-Crank angle sensor

2011 Nissan Serena crank-angle sensor

Yes, the 2011 Nissan Serena (C26 series, typically with the MR20DE or early MR20DD 2.0‑litre inline‑four) is fitted with a crank-angle sensor. Nissan’s factory literature labels it the Crankshaft Position Sensor (POS), which in everyday workshop speak is the crank-angle sensor. This sensor is essential for engine management and is not an optional or unused item on this model.

• Nissan Serena C26 Service Manual (EC – Engine Control), “Crankshaft Position Sensor (POS)” — Nissan technical publication covering MR20 series engines.
• Nissan FAST Electronic Parts Catalogue (C26 Serena) — lists Sensor Assy–Crankshaft under Nissan base part code 23731 for MR20 applications.
• OBD-II diagnostic references for MR20DE/MR20DD engines — fault codes P0335/P0336 associated with crankshaft position sensor signal.

The crank-angle sensor on a 2011 Nissan Serena is the engine’s timekeeper. It tracks crankshaft speed and exact rotational position, feeding that data to the ECM so it can fire the coils, schedule fuel injection, run variable valve timing, and manage start/stop or idle control. Without a clean signal, the Serena can crank a long time before starting, stall at idle, misfire, or refuse to start altogether, often lighting the MIL with codes like P0335.

There’s no routine replacement interval, it’s a monitor-and-fix item. Good servicing practice is to keep an eye on the wiring loom down the gearbox/bellhousing side of the engine where heat and vibration live, check the connector for oil ingress or green crusties, and make sure any nearby oil leaks are sorted so they don’t soak the sensor. A failing unit can be intermittent when hot, so technicians often road‑test to temperature and watch live data for RPM dropout.

When replacement is needed, use an OE or high‑quality aftermarket sensor with the correct connector keying and O‑ring. The job is straightforward: battery negative off, gain access from above or below, unplug the sensor, remove the retaining bolt, gently twist the sensor free, lightly oil the new O‑ring, seat it squarely, reinstall the bolt to factory torque, reconnect, then clear codes. Many Serenas won’t require a special relearn, the ECM will sync on first start and settle after a short drive. If idle is touchy after battery-off, an idle air volume learn with a scan tool can tidy things up.

Owners should be wary of bargain‑bin sensors, poor signal amplitude can mimic wiring faults. If the vehicle has had clutch or trans work, it’s smart to recheck the harness routing so it’s not pinched. With a healthy crank-angle sensor, the Serena starts crisply, idles smoothly, and keeps fuel economy and drivability on song for Kiwi and Aussie roads alike.

Popular questions about 2011 Nissan Serena crank-angle sensor

Where is the crank-angle sensor located on a 2011 Serena?
The sensor sits on the engine block at the gearbox/bellhousing side, reading a toothed wheel on the crank. On right‑hand‑drive C26 models it’s typically accessed from the front-left of the engine bay or from underneath with the splash shield off. A torch and a small socket help.

What are common signs the sensor is failing?
Hot no‑start or sudden stalling after a good warm‑up, extended cranking, rough idle, and the MIL on with P0335/P0336 are common. Live data may show RPM dropping to zero even while the engine is still spinning.

Does the Serena need a relearn after sensor replacement?
Usually the ECM will synchronise automatically on first start. If idle hunts or accessories were disconnected, a quick idle air volume learn using a capable scan tool can restore a factory‑smooth idle. Always clear fault codes and perform a short road test.