Details

• Brand:

  

• SKU:

  23731-5L30A

• Description:

  Description:

  Genuine OEM Nissan Cam/Crank Angle Sensor (CAS) Assembly — Part # 23731-5L30A

  One of the most sought-after genuine OEM sensors in the RB engine community — the factory Hitachi-manufactured Cam Angle Sensor for the R34 Skyline GT-R's RB26DETT and RB25DET NEO engines. This sensor is the primary trigger for ignition timing and fuel injection sequencing on the RB platform — and it's the slotted head version specific to the R34 NEO and RB26DETT applications. Not a reproduction. Not aftermarket. The real factory Nissan unit, sourced from authorized dealer stock.

  Part Details:

  • Part Number: 23731-5L30A
  • Other Names: Cam Angle Sensor, CAS, Crank Angle Sensor, Camshaft Position Sensor, Sensor Assembly-Crank, Crankshaft Position Sensor
  • Manufacturer: Hitachi (OEM supplier)
  • Condition: New, Genuine OEM Nissan JDM
  • Drive Style: Slotted Head — confirm your drive style before ordering (see note below)
  • Origin: JDM (Japanese Domestic Market)

  Compatible Vehicles:

  • Nissan Skyline BNR34 GT-R (RB26DETT — 1998–2002)
  • Nissan Skyline ER34 / ENR34 (RB25DET NEO Series 2 — 1998–2002)
  • Nissan Skyline R33 (RB25DET — select applications, confirm chassis code)
  • Nissan Stagea WC34 / WGNC34 (RB25DET NEO — select applications)

  ⚠️ Critical — Slotted Head Drive Style Only: The RB platform CAS comes in two drive styles — slotted head and hex head — and they are not interchangeable. This part number (23731-5L30A) is the slotted head version used on R34 NEO and RB26DETT applications. Always compare your existing CAS drive style before ordering. If your CAS has a hex head drive, a different part number applies.

  ⚠️ R33 & Stagea Fitment: For R33 and Stagea applications, fitment depends on your engine series and production date. Confirm your chassis code and engine series before ordering.

  Why buy genuine? Aftermarket CAS units for the RB platform are one of the most common sources of timing grief in the tuner community — incorrect trigger patterns, wrong reluctor spacing, and signal noise that causes misfires, timing scatter, and tuning headaches. The genuine Nissan/Hitachi unit is the only sensor that produces the exact trigger signal the RB's ECU was calibrated around. For a stock rebuild, a high-power street build, or a competition engine, there is no substitute for the factory sensor.

  When you need this part:

  • CAS failed — engine cranks but won't start, no RPM signal
  • Intermittent no-start or stalling after reaching operating temperature
  • Ignition timing scatter or misfires under boost
  • CAS body cracked or damaged — common on high-mileage RB engines
  • Preventive replacement during engine rebuild or timing belt service
  • Upgrading from a worn unit on a high-power RB build

  Ships fast from Walser Nissan Wayzata — an authorized Nissan dealership. Message us with your chassis code and we'll confirm fitment before you buy.

• Condition: New

WARNING: California Proposition 65

×

California Proposition 65

WARNING: Cancer and reproductive harm - www.P65Warnings.ca.gov