X AUTOHAUX Crankshaft Position Sensor for Nissan Sentra & Infiniti Q45 — 3-Pin Direct-Fit (23731-4350C)

The X AUTOHAUX 23731-4350C crankshaft position sensor is a direct-fit replacement sensor designed to restore accurate crankshaft timing data for compatible Nissan and Infiniti models.

If your engine is showing irregular idling, trouble starting, or diagnostic trouble codes related to crankshaft position, a worn or failed crankshaft position sensor can be the root cause. This replacement unit matches several OEM numbers (including 23731-4350C, 23731-4M500, 23731-4M502, 23731-4M505 and SU5745), features a three-pin connector, and is built from metal and durable plastic to withstand engine-bay conditions.

Which vehicles will accept this crankshaft position sensor?

This sensor is compatible with a broad range of Nissan and Infiniti models across model years. It fits Nissan Sentra (2000–2006) and many larger Nissan/Infiniti vehicles from mid-2000s to mid-2010s—always verify the OE number and vehicle application before ordering.

• Fits Nissan Sentra 2000–2006 and select Nissan NV/Titan/Armada/NV3500/NV2500 models.
• Fits Infiniti Q45 (2002–2006), FX45 (2003–2008), M45/M56 and QX56 across listed years.
• Cross-references OEM numbers: 23731-4350C, 23731-4M500, 23731-4M502, 23731-4M505 PC459, 23731-4M506, SU5745.

How does this replacement sensor perform compared with the original?

The X AUTOHAUX unit is engineered to deliver stable crankshaft position signals similar to the original equipment it replaces. It uses corrosion-resistant metal contacts and molded plastic housing to provide reliable operation under heat and vibration.

• Three-pin electrical interface matches OEM connector layout.
• Durable plastic and metal construction resists engine- compartment wear.
• Manufactured to re-establish accurate timing inputs for the ECU.

What should I check before buying and during installation?

Confirming fitment and basic wiring compatibility avoids returns and installation headaches. Inspect the OE part number, connector pin count, and mounting orientation on your vehicle before placing an order.

• Verify OEM number on existing sensor or vehicle parts list.
• Confirm the sensor has a three-pin connector and matching mounting flange.
• Clean mounting surface, tighten to manufacturer torque, and reconnect wiring harness securely.

Can I install this crankshaft sensor myself, and what tools are typically needed?

Many owners with basic mechanical skills can replace the sensor using common hand tools; however, access varies by vehicle. Typical installation requires removing an engine cover or components to reach the sensor, loosening its mounting bolt, swapping the old sensor, and re-securing the connector.

• Common tools: ratchet, socket set, screwdriver, penetrating oil if bolts are seized.
• Allow time to clear any engine covers and ensure the engine is cool.
• After installation, clear any diagnostic trouble codes and verify normal idle and starting.

Who is this for: Drivers, DIY mechanics, and independent repair shops seeking an affordable, direct-fit replacement crankshaft position sensor for specified Nissan and Infiniti models. If your vehicle shows symptoms like difficult starting, stalling, or a crankshaft-related error code and your OE number matches one of the listed cross-references, this X AUTOHAUX sensor is a practical replacement option to restore reliable crankshaft signal input to the engine control unit.