Details

• Brand:

  

• SKU:

  23703-4RA9B

• Other Names:

  ECM, Engine Control Module - Blank

• Description:

  Experiencing a no-start, rough idle, or multiple system codes? Restore full electronic control and drivability with the OEM Nissan Engine Control Module (ECM) (Part #23703-4RA9B), designed to precisely manage engine performance, emissions, and transmission logic.

  Engine Control Module (ECM) (23703-4RA9B) – OEM Replacement Part for Nissan

  This genuine Nissan ECM (also known as the Engine Control Unit or ECU) serves as the main computer for your vehicle’s powertrain system. It continuously monitors sensors and controls ignition timing, fuel injection, variable valve timing, and emissions systems for smooth performance and compliance with factory specifications.

  A damaged or improperly programmed ECM can cause engine misfires, hard starting, poor fuel economy, or inoperative electronic components. Replacing it with a genuine Nissan ECM ensures proper communication with all on-board modules and vehicle systems.

  Specifications

  • Part Type: Engine Control Module (ECM / ECU)

  • Function: Manages ignition timing, air/fuel ratio, transmission logic, and emissions controls

  • Construction: OEM-grade microprocessor assembly in sealed aluminum housing

  • Programming: Requires VIN-specific configuration and key registration (Nissan CONSULT tool)

  • Includes: One (1) ECM unit (unprogrammed – must be initialized to vehicle)

  Compatible Nissan Models

  • 2012–2018 Nissan Altima (L33US)

  • 2015–2025 Nissan Maxima (A36US)

  • 2014–2024 Nissan Murano (Z52US)

  • 2010–2025 Nissan Quest (E52US)

  Fitment and calibration vary by engine, transmission, and emission package. To confirm compatibility and correct programming part number for your vehicle, click here

  and enter your VIN using the “Search by VIN #” feature before ordering.

  Key Features

  • Genuine Nissan OEM module ensures factory-level performance and communication

  • Restores proper ignition, fuel delivery, and emission control

  • Fully compatible with Nissan’s CAN communication network

  • Meets all federal and state emissions compliance requirements

  • Direct-fit replacement — identical mounting and connector layout

  Important Programming & Installation Notes

  • This ECM must be programmed and initialized using Nissan CONSULT or an equivalent factory scan tool.

  • Immobilizer (NATS) registration is required to synchronize your vehicle’s ignition key(s).

  • Before replacement, verify power supply, ground, and related fuses to prevent repeat failures.

  • ECMs are VIN-locked once programmed and cannot be reused on another vehicle.

  • To prevent installation errors, always follow Nissan’s service procedure and verify calibration ID.

  Failing to Replace a Faulty ECM Can Lead To

  • No Start or Stalling: ECM cannot control ignition or fuel injectors

  • Check Engine Light: Persistent codes despite new sensors

  • Transmission Shifting Issues: Loss of ECM-to-TCM communication

  • Poor Fuel Economy or Misfires: Incorrect air/fuel calculations

  • Emission System Faults: Failure to pass readiness monitors or state inspection

  Related Components to Inspect or Replace

  • Battery & Cables: Weak voltage can damage ECM circuits

  • Ground Straps: Corrosion can cause ECM signal errors

  • Mass Air Flow Sensor: Often sets false codes when ECM communication fails

  • Throttle Body: Requires ECM relearn after replacement

  • Engine Wiring Harness: Inspect for damage or pin corrosion

  Order with Confidence

  Order the OEM Nissan Engine Control Module (23703-4RA9B) to restore full electronic control and drivability. Genuine Nissan ECMs are engineered for precise communication and calibration, ensuring compatibility with your vehicle’s factory systems.

  Restore Your Nissan with Genuine Accessories!

  Keep your Nissan performing like new with genuine factory parts and accessories. From sensors and control modules to floor mats and roof racks, shop authentic Nissan products at parts.chapmannissan.com

  .

  Why Buy OEM Nissan Parts from Chapman Nissan?

  Every ECM sold through Chapman Nissan is genuine from Nissan, designed to meet original factory specifications for durability, compatibility, and emissions performance. Unlike aftermarket units, OEM modules support factory calibration IDs and immobilizer pairing.

  • Fast, secure shipping from a certified Nissan dealer

  • VIN verification available for guaranteed match

  • Trusted by Nissan owners and professional technicians

  ECM & Engine Electronics FAQ

  Q: Does this ECM come programmed?
  A: No — it requires VIN-specific programming and key registration using Nissan CONSULT or an authorized service tool.

  Q: Can I install this ECM myself?
  A: Physical installation is simple, but programming must be performed by a certified technician or dealership.

  Q: Will replacing the ECM clear my check engine light?
  A: Only if the ECM was the cause — related components or wiring should be verified first.

  Q: Can I reuse an ECM from another vehicle?
  A: No — once programmed to a VIN, ECMs cannot be transferred.

• Condition: New
• Notes: Part located left side of engine compartment.
• Replaces:

  237034ra9a

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