Parts for your 2011 Nissan X-trail-Crank angle sensor

2011 Nissan X‑TRAIL crank-angle sensor: purpose, fitment and servicing tips

Yes — the 2011 Nissan X‑TRAIL (T31 series) uses a crank‑angle sensor, more commonly listed by Nissan as the crankshaft position (CKP/POS) sensor. This is documented in the Nissan X‑TRAIL T31 Series Service Manual (Engine Control section) and reflected in Nissan FAST/parts catalogues under PNC 23731 for the MR20DE and QR25DE petrol engines, as well as the M9R 2.0 dCi diesel. These technical sources confirm the sensor is factory‑fitted and critical to engine management.

On this X‑TRAIL, the crank‑angle sensor tracks crankshaft speed and position so the ECM can fire the spark and inject fuel at the right moments, manage variable valve timing, and monitor misfires. Without a clean, accurate signal, the engine may crank without starting, run roughly, or stall at random — not ideal when ducking to the shops or heading bush.

Owners will usually see a check engine light and fault codes like P0335–P0339 when the sensor or its wiring plays up. Common symptoms include:

• Hard starting or no start when hot
• Intermittent stalling at idle or low speed
• Hesitation, rough idle, or poor fuel economy
• Security‑like cut‑out that resolves after cool‑down

Routine servicing doesn’t require scheduled replacement of the crank‑angle sensor, but a few preventative checks go a long way:

• Inspect the connector and harness under the bonnet for oil wicking, heat damage, or chafing.
• Keep the mounting area clean, debris or metal filings can disturb the signal.
• Fix oil leaks promptly so they don’t soak the sensor or plug.

Replacement is straightforward for a competent home mechanic with axle stands. On MR20DE/QR25DE, the sensor is typically at the rear of the block near the bellhousing, on the M9R diesel it’s mounted at the gearbox housing. Disconnect the battery, unplug the connector, remove the retaining bolt, and withdraw the sensor. Lightly oil the new O‑ring, seat the sensor squarely, and tighten the bolt to the service‑manual spec. Always clear codes and verify live data with a scan tool, a quick road test should show stable crank signal and no immediate return of codes.

Genuine or high‑quality OEM‑equivalent sensors are recommended for reliability — cheap units often cause hot‑start niggles. If faults persist after replacement, check for timing issues, poor grounds, or ECM wiring faults before throwing more parts at it.

Popular questions

Where is the crank‑angle sensor on a 2011 X‑TRAIL?
Petrol MR20DE/QR25DE: usually at the rear of the engine near the transmission bellhousing. Diesel M9R: mounted on the gearbox housing reading the flywheel. Access is often easiest from underneath with the splash shield off.

What are the signs my X‑TRAIL’s crank‑angle sensor is failing?
Hard hot starts, intermittent stalling, rough idle, and a check engine light with codes like P0335 are common. The issue may be worse when the engine is heat‑soaked, then temporarily clears once it cools.

Is it safe to drive with a dodgy crank‑angle sensor?
Not really. The engine can cut out without warning, which isn’t safe in traffic. It’s best to diagnose and replace the sensor or repair the wiring before regular driving.