Parts for your 2008 Nissan Serena-Crank angle sensor

2008 Nissan Serena crank-angle sensor: purpose, care, and replacement

Based on technical references including the Nissan Serena C25 model series Service Manual (Engine Control/EC sections) and MR-series engine documentation used across MR20DE-powered models, the 2008 Nissan Serena is fitted with a crank-angle sensor (commonly called the crankshaft position sensor). OEM parts catalogues for the C25 Serena also list this sensor as a service part, confirming it’s relevant to this vehicle.

The crank-angle sensor tracks the exact position and speed of the crankshaft so the ECU can fire the injectors and spark at precisely the right moments. On the Serena’s MR20DE, it’s mounted low on the block near the transmission bellhousing, reading a toothed wheel on the crank. When it plays up, expect hard starting, intermittent stalling, a dead tachometer during cranking, rough running, limp mode, and engine codes like P0335/P0336.

There’s no scheduled replacement interval, but during routine servicing it’s smart to check the wiring loom for rub-through, oil-soak, or brittle insulation, and make sure the connector is clean and clipped home. A quick scan of live data and stored fault codes helps spot an intermittent sensor before it strands anyone.

• Typical signs it’s time to replace: long crank/no start when hot, sudden cut-out then restart after cooling, or repeat crank-angle sensor fault codes.
• Common causes: age-related internal failure, heat and vibration, or contamination from oil leaks.

Replacement is straightforward: disconnect the battery, unplug the sensor, remove the single retaining bolt, twist it gently free, and install the new unit with a light smear of clean engine oil on the O-ring. Don’t over-tighten the bolt—nip it to the factory torque. Keep metal filings away from the sensor tip and route the harness exactly as per the original to avoid heat and belt contact. On the Serena, no special programming is typically required after fitting, clear codes and confirm clean crank and RPM signals on a scan tool. If the battery’s been disconnected, an idle air volume learn might be needed to tidy up idle quality.

Quality matters here—choose a reputable OEM-equivalent sensor. It’s a relatively small part that makes a big difference to reliability, fuel economy, and smooth running in Aussie and Kiwi conditions.

Popular questions about the 2008 Nissan Serena crank-angle sensor

Where is the crank-angle sensor located on a 2008 Nissan Serena?
On MR20DE-equipped Serenas (C25), it’s typically mounted low on the engine block at the transmission side, reading the flywheel/flexplate. Access is from underneath or from the side of the engine bay, depending on model and splash shields.

Look for a small two-wire or three-wire sensor held in with a single bolt, with its connector leading up into the engine loom. Don’t mix it up with the cam sensor near the timing cover.

What symptoms point to a failing crank-angle sensor?
Common clues include hard starting (especially when hot), sudden stalling, misfiring at low rpm, and a dead or jumpy tacho while cranking. The check engine light often logs P0335/P0336 codes.

If those symptoms are intermittent, a heat-soak test or a drive with live data can help confirm the fault before replacement.

Does the sensor need programming after replacement?
On the 2008 Serena, the crank-angle sensor usually doesn’t require coding. After installation, clear any fault codes and verify a steady RPM signal and normal starting.

If the battery’s been disconnected or the throttle body cleaned at the same time, performing an idle air volume learn may help stabilise idle speed.