A Guide to the Mass Air Flow Sensor on Your 2011-2012 INFINITI G25
Fix poor idling and hesitation issues by choosing the right replacement Mass Air Flow sensor for your G25's V6 engine.
- Check TSB #ITB13-054d first. If you have codes P0101/P010B with no drivability issues, you may need an ECM reprogram, not a new sensor.
- Hitachi is the original equipment manufacturer (OEM) and is the most recommended brand for a reliable replacement.
- Your G25 has two MAF sensors; consider replacing them in pairs for balanced performance.
- Before replacing, try cleaning the sensors with dedicated MAF sensor cleaner as a potential low-cost fix.
Is Your G25's MAF Sensor Failing?
A faulty Mass Air Flow (MAF) sensor can cause noticeable changes in how your INFINITI drives. Because the engine's computer receives bad information, it can't properly control the air-fuel mixture. You might notice one or more of the following issues:
- Check Engine Light: This is the most common sign. The system will often store trouble codes like P0101 or P010B. 🎬 Watch this walkthrough on replacing a sensor for code P010B.
- Hesitation or Jerking: The car may stumble or jerk when you accelerate, especially when trying to merge or pass.
- Rough Idle: Your engine might shake or idle unevenly when you're stopped at a light.
- Poor Fuel Economy: An incorrect reading can cause the engine to use more fuel than necessary, leading to more frequent trips to the gas station.
- Black Exhaust Smoke: If the engine runs too rich (too much fuel), you might see black smoke from the tailpipe.
- Hard Starting: In some cases, a bad MAF sensor can make the engine difficult to start.
IMPORTANT: Check for a TSB Before Replacing Parts
INFINITI released a Technical Service Bulletin (TSB #ITB13-054d) for the 2011-2012 G25. If your Check Engine Light is on with codes P0101 or P010B but you are not experiencing any drivability problems (like hesitation or rough idle), the MAF sensor may not be the problem. The bulletin advises that the Engine Control Module (ECM) may need a software update. In this specific case, INFINITI states that the MAF sensor should not be replaced. Contact an INFINITI dealer or a qualified shop with this TSB information to see if an ECM reprogram is needed first.
Choosing the Right Aftermarket MAF Sensor
Your G25 has two MAF sensors, and while you can replace just the one that has failed, it's often wise to replace them in pairs to ensure balanced readings. When it comes to aftermarket parts, quality can vary significantly. For a sensitive component like a MAF sensor on an INFINITI, choosing a quality part is crucial.
Tier 1: OEM Supplier
Hitachi is the Original Equipment Manufacturer (OEM) for the MAF sensors in your G25. This means they made the original part that came with your car from the factory. Choosing a Hitachi-branded aftermarket sensor is the safest way to ensure proper fit, calibration, and performance. Forum users and mechanics strongly recommend sticking with the OEM supplier for sensitive electronics on these vehicles to avoid compatibility issues.
Tier 2: Reputable Aftermarket Brands
Brands like Delphi, NGK (NTK), Beck Arnley, Hella, Standard Ignition, and Walker Products have a long history of producing reliable aftermarket components. These sensors are designed to meet or exceed original specifications and are a solid choice if an OEM-branded part isn't available. They generally offer good performance and are trusted by many professional repair shops.
Tier 3: Budget-Friendly Options
Brands such as Cardone, Spectra, and DriveWire offer more affordable solutions. While they can restore function, their long-term reliability and precision may not match that of the higher-tier brands. A remanufactured Cardone part is an option, but be aware that quality can be inconsistent. For a car like the G25 that can be particular about its sensors, a budget part might solve the problem in the short term but could lead to issues down the road.
| Part Type | Estimated Cost (Per Sensor) |
|---|---|
| New Aftermarket | $56.59 - $197.13 |
| New OEM (INFINITI-Branded) | $215 - $370 |
| Shop Labor | $50 - $75 |
Pro Tip: Try Cleaning the Sensor First
Before buying a new sensor, it's worth trying to clean the old one. Over time, dirt and oil can build up on the sensor's delicate wire, causing incorrect readings. Purchase a dedicated MAF sensor cleaner from an auto parts store—do not use brake cleaner or carburetor cleaner, as they can damage the sensor. The process is simple: unplug the sensor, remove the two screws holding it in, carefully spray the sensor elements, let it dry completely, and reinstall it. If this solves your problem, you've saved yourself the cost of a new part.
🎬 See how to properly clean or replace your Infiniti sensor.Frequently Asked Questions (FAQ)
Does my 2011-2012 G25 have one or two MAF sensors?
Your G25 has two MAF sensors. The 2.5L V6 engine uses a dual air intake system, with one air filter box and one MAF sensor for each cylinder bank.
What is an 'Idle Air Volume Relearn' and do I need to do it?
An Idle Air Volume Relearn is a procedure that teaches the car's computer the correct throttle position for a stable idle. After replacing MAF sensors or cleaning the throttle body, the idle might be too high or unstable. Sometimes the car will relearn on its own after driving for a bit, but other times it requires a specific pedal dance procedure or a professional scan tool to complete.
🎬 Watch this guide to performing the Nissan and Infiniti relearn procedure.Is it hard to replace the MAF sensors myself?
No, this is a very easy DIY job. The sensors are located on top of the air filter boxes and are held in by just two screws and an electrical connector. The entire process for one sensor can take less than 15 minutes with basic hand tools.
The parts store sold me a sensor with the housing. Do I need that?
No, for the G25 you typically only need to replace the sensor element itself, which is the small part that is secured with two screws. The larger plastic tube, or housing, that it sits in rarely needs to be replaced unless it is physically cracked or broken.
Helpful Videos
Technical Specifications
OEM Part Numbers: 22680-1MG0A 22680-7S00A 22680-7S00B
The 2011-2012 INFINITI G25 is equipped with two Mass Air Flow sensors, one for each cylinder bank of its V6 engine.
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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
- Is Your G25's MAF Sensor Failing?
- IMPORTANT: Check for a TSB Before Replacing Parts
- Choosing the Right Aftermarket MAF Sensor
- Tier 1: OEM Supplier
- Tier 2: Reputable Aftermarket Brands
- Tier 3: Budget-Friendly Options
- Pro Tip: Try Cleaning the Sensor First
- Frequently Asked Questions (FAQ)
- 🎟️ Get 5% Off