2011 Infiniti G25 Engine Computer (ECM): Programming, Part Numbers, and Replacement Guide
Avoid costly mistakes by understanding the critical VIN programming and part number matching required for your G25's engine computer.
- A replacement ECM for a 2011 Infiniti G25 MUST be programmed to the vehicle's VIN and anti-theft system (NATS); it is not plug-and-play.
- You must match the OEM part number from your original module exactly. There are different modules for RWD and AWD models.
- Programming requires an Infiniti dealer or a specialized automotive locksmith with access to Nissan's CONSULT software or equivalent.
- Common signs of failure include a no-start condition, persistent check engine light (especially code P0605), and rough running or stalling.
- Mail-in programming services are a viable option that can make a remanufactured or used unit ready for installation upon arrival.
Symptoms of a Failing 2011 Infiniti G25 ECM
When the ECM in a G25 begins to fail, it can cause a wide range of problems, from subtle issues to a complete no-start. Because the ECM controls so many systems, symptoms can sometimes be mistaken for other problems, but a few key signs point toward the module itself.
- Check Engine Light: A constant check engine light is the most common sign. If the light returns immediately after being cleared, it could indicate an internal ECM fault.
- Engine Performance Issues: This includes random stalling, rough idling, engine misfires, hesitation during acceleration, and a sudden loss of power.
- No-Start Condition: The engine may crank but refuse to start. This happens when the ECM fails to control the ignition or fuel systems, or when it loses communication with the immobilizer system.
- Poor Fuel Economy: If the ECM cannot properly regulate the air-fuel mixture, fuel consumption can increase significantly.
- Communication Errors: A mechanic's diagnostic scan tool may be unable to communicate with the ECM. This often triggers a U0100 "Lost Communication with ECM/PCM" code. A common fault code for internal failure is P0605, which points directly to a problem within the module's memory or processor.
Buying a Used 2011 Infiniti G25 ECM: A Buyer's Guide
Purchasing a used ECM can be a cost-effective solution, but it requires careful attention to detail to avoid compatibility issues. Because this part is not plug-and-play, getting the right one from the start is essential.
The #1 Rule: Match Your Part Number EXACTLY
The most critical step is to match the OEM part number on your original ECM. Infiniti and its supplier, Hitachi, used several different part numbers for the 2011 G25. The part number is printed on a sticker on the outside of the metal case. You must remove the original ECM to find this number. The ECM is typically located in the engine bay near the firewall or behind the glove box.
🎬 Watch a video showing where to find the ECU locationWarning: Do not purchase an ECM based on vehicle year and model alone. There are crucial differences between modules for Rear-Wheel Drive (RWD) and All-Wheel Drive (AWD) models. Installing the wrong one can lead to transmission shifting problems, warning lights, and other drivability issues.
Known Part Numbers for the 2011 Infiniti G25:
| Manufacturer | Part Number | Notes |
|---|---|---|
| Hitachi | MEC106-210 C1, MEC106-211 A1 | Check compatibility for RWD |
| Hitachi | MEC106-220, MEC106-221 | Often associated with AWD models |
| Infiniti | 23703-1BG0A, 23710-1NM0A, 23710-1NM0B, 23710-1NM0C, 23710-1NM0D | Verify against original module |
| Infiniti | 23710-1NM1A, 23710-1NM1B, 23710-1NM1C, 23710-1NM1D, 23710-1NM1E | These numbers often supersede earlier versions. |
Physical Inspection Checklist
When inspecting a used ECM, look for:
- No Corrosion: Check the pins in the electrical connectors for any signs of green or white corrosion.
- Intact Case: Ensure the metal case has not been pried open or damaged.
- No Water Damage: Look for any water lines or rust, which indicate the unit was exposed to moisture.
ECM Programming and Immobilizer Synchronization
Critical: A replacement ECM, whether new, used, or remanufactured, must be programmed to your vehicle. The car will not start until this procedure is completed.
What is Programming and NATS?
Programming involves two main steps. First, the replacement ECM must be loaded with your car's unique Vehicle Identification Number (VIN). Second, it must be synchronized with the Nissan Anti-Theft System (NATS). This system ensures that only a recognized key can start the engine. If the ECM and the Body Control Module (BCM), which manages the keys, do not recognize each other, the immobilizer will prevent the engine from starting.
Who Can Program the ECM?
This is not a simple DIY task. The programming requires specialized equipment.
- Infiniti Dealership: A dealer has the proprietary CONSULT diagnostic tool required to perform the programming and key synchronization. This is the most reliable, though often most expensive, option.
- Specialized Automotive Locksmiths: Some advanced locksmiths have the tools and software to program Infiniti modules and keys, often at a lower cost than the dealer.
- Mail-In Programming Services: Many online sellers of used and remanufactured ECMs offer a mail-in service where they program the replacement module with your VIN before shipping it to you. This can make the unit "plug and play," although sometimes a final key relearn procedure is still needed on the vehicle.
Pro Tip: Before buying a used ECM, call local dealerships and automotive locksmiths to confirm they can program a customer-supplied module and to get a price quote. Some shops may refuse to program parts they did not sell.
Known Issues, TSBs, and Recalls
As of mid-2024, there are no specific recalls from the National Highway Traffic Safety Administration (NHTSA) for the 2011 Infiniti G25's Engine Control Module. However, Infiniti has issued Technical Service Bulletins (TSBs) that involve reprogramming the ECM to fix other issues, such as ITB12-023b, which requires an ECM and TCM reprogram to address certain performance characteristics. This indicates that the software on the module is critical and can be updated to resolve problems.
Cost Comparison for a 2011 G25 ECM
| Part Type | Estimated Cost | Notes |
|---|---|---|
| New OEM | $1,100 - $1,650+ | Part only. Does not include dealer programming. |
| Remanufactured | $250 - $500 | Often includes mail-in VIN programming. |
| Used OEM | $75 - $200 | Part only. Requires separate programming. |
| Shop Labor (Installation) | $90 - $135 | Estimated 0.8 hours for physical replacement. |
| Shop Labor (Programming) | $100 - $300 | Varies widely between dealers and independent shops. |
Frequently Asked Questions (FAQ)
Can I install the ECM myself to save money?
Yes, the physical installation is straightforward for someone with basic mechanical skills. It typically involves disconnecting the battery and removing a few connectors and bolts. However, the vehicle will be immobilized and will not start until the ECM is professionally programmed.
Will my car start if I use an ECM from another 2011 G25?
No. Due to the immobilizer system (NATS), an ECM from another vehicle will not allow the engine to start until it has been reprogrammed to match your car's VIN and keys.
What happens if I install an AWD ECM in my RWD G25 (or vice-versa)?
The vehicle may not run correctly, if at all. The ECM for an AWD model is programmed to communicate with the AWD control unit and has different logic for the transmission and traction control systems. Using the wrong module will likely cause multiple warning lights and severe drivability or shifting problems.
How do I find the part number on my original ECM?
The ECM is a metal box located either in the engine compartment near the passenger-side firewall or behind the glove compartment. You will need to access it and look for a large sticker that contains the Hitachi (e.g., MEC106-XXX) and/or Infiniti (e.g., 23710-XXXXX) part numbers.
Helpful Videos
Technical Specifications
OEM Part Numbers: MEC106-210 C1 MEC106-211 A1 MEC106-220 MEC106-221 23703-1BG0A 23710-1NM0A 23710-1NM0B 23710-1NM0C 23710-1NM0D 23710-1NM1A 23710-1NM1B 23710-1NM1C 23710-1NM1D 23710-1NM1E
Controls a 2.5L VQ25HR V6 engine. Communicates via CAN bus network with other vehicle modules. Linked to Nissan Anti-Theft System (NATS).
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- INFINITI G25:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Symptoms of a Failing 2011 Infiniti G25 ECM
- Buying a Used 2011 Infiniti G25 ECM: A Buyer's Guide
- The #1 Rule: Match Your Part Number EXACTLY
- Known Part Numbers for the 2011 Infiniti G25:
- Physical Inspection Checklist
- ECM Programming and Immobilizer Synchronization
- What is Programming and NATS?
- Who Can Program the ECM?
- Known Issues, TSBs, and Recalls
- Cost Comparison for a 2011 G25 ECM
- Frequently Asked Questions (FAQ)
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