INFINITI M56 (2011-2013) Mass Air Flow Sensor Guide
Understanding the dual Mass Air Flow (MAF) sensors on your M56's 5.6L V8 and how to choose the right replacement.
- Your M56 has two MAF sensors; it's best practice to replace them as a pair.
- Hitachi is the OEM supplier; choosing this brand for an aftermarket part ensures a perfect match in quality and performance.
- Before replacing, try cleaning the sensors with a dedicated MAF cleaner spray as a first troubleshooting step.
- A P0101 code can also be caused by vacuum leaks or a dirty air filter, so check these simple items first.
Is Your INFINITI M56 Showing Signs of a Bad MAF Sensor?
A failing Mass Air Flow (MAF) sensor on your 2011-2013 INFINITI M56 can cause noticeable engine problems. Because your V8 engine has two sensors, issues can sometimes be tricky to diagnose. Often, the first sign is the Check Engine Light turning on. You might also experience a rough idle, hesitation when you accelerate, or a general lack of power. Some owners report sudden engine surging or even stalling in more severe cases. Another key symptom is a drop in fuel economy, as the engine's computer struggles to maintain the correct air-fuel balance.
Important Note for M56 Owners
The 2011-2013 INFINITI M56 is equipped with the VK56VD engine, which features a dual air-intake system. This means your vehicle has two Mass Air Flow sensors, one for each intake duct leading to the throttle bodies. When one fails, it's often recommended to replace them as a pair to ensure balanced engine performance and prevent future issues, as they are the same age and have experienced the same conditions.
Choosing the Right Aftermarket MAF Sensor
When replacing a MAF sensor on a high-performance engine like the M56's, part quality is crucial. Using a low-quality sensor can lead to persistent performance problems, even after the replacement. Here’s a breakdown of your options:
- Tier 1: OEM-Equivalent (Hitachi): Hitachi is the original equipment (OE) supplier for many Nissan and INFINITI parts, including the MAF sensor. Choosing an aftermarket Hitachi sensor gives you the exact same part that came with your car from the factory, without the dealership price tag. This is the most recommended option for guaranteed fit, function, and longevity.
- Tier 2: Reputable Aftermarket Brands (Delphi, Hella): Brands like Delphi and Hella are well-known in the aftermarket industry and produce quality electronic components. Their MAF sensors are a reliable alternative to the OEM part and are often more affordable. They are engineered to meet or exceed OE specifications and are a solid choice if a Hitachi sensor is not available.
- Tier 3: Budget-Focused Brands (Cardone, Walker, Standard Ignition): These brands offer a more cost-effective solution. Cardone often provides remanufactured parts, which are rebuilt OE units, but they also have new product lines. Walker Products and Standard Ignition are other budget-friendly options. While they can work, some forum discussions from vehicle owners suggest that budget sensors can sometimes be less reliable or have a shorter lifespan, potentially causing drivability issues. These are best considered when budget is the primary concern.
Pro Tip: Try Cleaning First
Sometimes, a MAF sensor isn't faulty but simply dirty. Oil from air filters or other debris can coat the delicate sensor element, causing incorrect readings. Before buying a new part, you can try cleaning your existing sensors with a dedicated MAF sensor cleaner spray. This is an inexpensive first step that can sometimes resolve the issue. However, if the problem persists, a replacement is necessary.
Cost of Replacing an INFINITI M56 MAF Sensor
The cost can vary based on the brand you choose and whether you do the work yourself. The replacement is very simple and accessible for most DIY mechanics.
| Part Type | Estimated Cost (Per Sensor) |
|---|---|
| New OEM (Dealer) | $210 - $350 |
| New Aftermarket (Hitachi - OEM Supplier) | $150 - $250 |
| New Aftermarket (Other Brands) | $122 - $313 |
| Shop Labor | $50 - $100 |
Frequently Asked Questions
Do I need to replace both MAF sensors at the same time?
While not strictly required, it is highly recommended. Since both sensors have the same amount of wear and tear, the second one may fail soon after the first. Replacing them in pairs ensures the engine receives balanced readings from both banks for smooth operation.
Is a special tool needed for replacement?
No, a basic set of tools is all that's required. Typically, you'll only need a Phillips head screwdriver or a small socket (like an 8mm) to remove the two screws holding the sensor in place, and perhaps a flathead screwdriver or pliers for the air duct clamps.
My check engine light is on for code P0101. Does that mean the MAF is bad?
DTC P0101 points to a problem with the MAF sensor circuit's range or performance. While this often means the sensor is failing, it can also be caused by a dirty sensor, a vacuum leak in the intake system after the sensor, or a clogged air filter. It's wise to check these other possibilities before replacing the part.
Are there any recalls for the M56 MAF sensor?
No, there are no specific recalls for the Mass Air Flow sensors on the 2011-2013 INFINITI M56. However, there was a Technical Service Bulletin (ITB13-054d) for some Infiniti models that could throw a P0101 code, which required an ECM reprogram instead of a sensor replacement. It's worth checking if this TSB applies if you have no drivability issues. There was also a voluntary service campaign for timing chains on these models, which can sometimes cause related engine performance symptoms.
Technical Specifications
OEM Part Numbers: 22680-1MB0A 22680-7S000 22680-7S00A 22680-7S00B
The M56 uses two identical 5-pin, blade-type MAF sensor inserts that are installed into the dual air intake ducts.
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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.
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