INFINITI Q70 Mass Air Flow Sensor Replacement Guide (2014-2019)
Experiencing a rough idle, poor acceleration, or bad gas mileage in your Q70? A failing Mass Air Flow sensor is a likely cause.
- Hitachi is the original equipment brand for the Q70's MAF sensor, making it the safest aftermarket choice for reliability and performance.
- Common failure symptoms include a rough idle, poor acceleration, bad fuel economy, and a Check Engine Light with code P0101.
- Replacement is a simple DIY job that takes less than 15 minutes with basic tools, saving you money on labor costs.
- The V8 engine uses two MAF sensors; it is best to replace them as a pair to ensure proper engine balance.
Symptoms of a Failing MAF Sensor in a Q70
When a MAF sensor starts to fail, your INFINITI Q70 will let you know. The signs can range from annoying to serious. 🎬 Learn if it is safe to drive with a failing sensor. Because the sensor's data is incorrect, the engine's computer can't properly balance the air and fuel mixture. This can lead to a variety of noticeable problems.
🎬 See a detailed breakdown of common bad MAF sensor symptoms.- Check Engine Light: This is often the first sign. A code like P0101 (Mass Air Flow Sensor Circuit Range/Performance) is very common for this issue.
- Rough Idle: Your engine may shake or surge while you're stopped at a light.
- Poor Acceleration: The car might feel sluggish, hesitate, or jerk when you press the gas pedal.
- Decreased Fuel Economy: If the sensor tells the computer there's more air than there really is, the engine will use too much fuel, hurting your gas mileage.
- Black Smoke from Exhaust: This is a sign the engine is running "rich," meaning too much fuel and not enough air are being burned.
- Stalling or Hard Starting: In more severe cases, an incorrect air-fuel mixture can cause the engine to stall or have trouble starting.
Known Issue: ECM Reprogramming TSB
INFINITI issued a Technical Service Bulletin (TSB), #ITB13-054d, for some 2014-2015 Q70 models with the V6 engine. This TSB addresses a Check Engine Light with DTC P0101 or P010B where there are no actual drivability problems. The fix is to reprogram the Engine Control Module (ECM) 🎬 Watch this step-by-step guide on fixing the common P0101 code., not to replace the MAF sensor. If your car has these codes but runs fine, check with a dealer to see if this TSB applies before buying a new sensor.
Choosing the Right Aftermarket MAF Sensor
When replacing the MAF sensor on your Q70, you have a choice between OEM and various aftermarket brands. For many Nissan and INFINITI vehicles, being selective about electronics is wise. Some aftermarket sensors, especially the cheapest ones, may not work correctly or fail quickly.
Brand Tiers for Your INFINITI Q70
Not all aftermarket brands are created equal. Here’s a breakdown to help you choose:
- Tier 1: OEM Supplier Brands (Highest Quality): Hitachi is the Original Equipment Manufacturer (OEM) for many Nissan and INFINITI vehicles. Choosing a Hitachi sensor is the closest you can get to buying the part from an INFINITI dealer, ensuring perfect fit and performance. Delphi is another top-tier OE supplier known for making high-quality sensors that are always new, never remanufactured.
- Tier 2: Reputable Aftermarket Brands (Good Quality): Brands like NGK/NTK, Spectra Premium, Standard Ignition (SMP), and Walker Products have a solid reputation for producing reliable parts that meet or exceed OEM standards. They offer a good balance of quality and price.
- Tier 3: Budget Brands (Use with Caution): Brands like Cardone (which offers new and remanufactured parts), DriveWire, and other lower-priced options can be a gamble. While they are affordable, some owners report issues with incorrect readings or short lifespans, which can lead to ongoing engine problems.
Pro Tip: V6 vs. V8 Engines
The INFINITI Q70 was available with a 3.7L V6 (VQ37VHR) and a 5.6L V8 (VK56VD). The V6 engine uses one MAF sensor. The V8 engine uses two MAF sensors, one for each engine bank. If you have the V8, it's recommended to replace both sensors at the same time to ensure balanced readings. Always confirm the part number for your specific engine before purchasing.
Cost of Replacing an INFINITI Q70 MAF Sensor
The cost can vary significantly based on the brand you choose and whether you do the work yourself. Replacement is very easy and can be done with basic tools in under 15 minutes, making it a great DIY task to save on labor costs.
| Part Type | Estimated Cost |
|---|---|
| New OEM (from dealer) | $207 - $352 |
| New Aftermarket | $56 - $404 |
| Shop Labor | $37 - $54 |
Frequently Asked Questions (FAQ)
Can I just clean my Q70's MAF sensor?
Sometimes, cleaning the MAF sensor with a dedicated MAF sensor cleaner spray can solve the problem, especially if it's just dirty. However, this is often a temporary fix. If the sensor's electronics are failing, or if cleaning doesn't resolve the issue, replacement is necessary. Never touch the delicate sensor wires inside.
Is it hard to replace the MAF sensor myself?
No, it is a very easy job. The sensor is located on the air intake tube right after the air filter box. It is typically held in by two screws and has one electrical connector. You just need to unplug the connector, unscrew the old sensor, and install the new one.
Do I need to buy the whole housing or just the sensor?
For the Q70, you can typically buy just the sensor element (also called a probe-only or insert). This is more cost-effective and environmentally friendly since you are reusing the plastic housing. Most aftermarket brands sell the sensor this way.
Do I need to reset the computer after replacing the MAF sensor?
It is a good practice to disconnect the battery before starting the work. After installing the new sensor and reconnecting the battery, the car's computer will begin to relearn the new sensor's parameters. You may need to clear the Check Engine Light with an OBD-II scanner. In some cases, an idle air volume relearn procedure may be needed if the idle is unstable.
Are there any recalls for the Q70 MAF sensor?
No, there are no specific recalls for the Mass Air Flow sensor on the 2014-2019 INFINITI Q70. There was a TSB for an ECM software update that could cause a MAF sensor code, but not a recall for the part itself.
Helpful Videos
Technical Specifications
OEM Part Numbers: 22680-7S000 22680-7S00A 22680-7S00B 22680-1MG0A 22680-1MB0A
The INFINITI Q70 uses a hot-wire type MAF sensor insert. The 3.7L V6 (VQ37VHR) and 3.5L Hybrid (VQ35HR) engines use a single sensor, commonly part number 22680-7S000 or 22680-1MG0A. The 5.6L V8 (VK56VD) engine requires two sensors, often part number 22680-1MB0A.
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 Q70:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Symptoms of a Failing MAF Sensor in a Q70
- Known Issue: ECM Reprogramming TSB
- Choosing the Right Aftermarket MAF Sensor
- Brand Tiers for Your INFINITI Q70
- Pro Tip: V6 vs. V8 Engines
- Cost of Replacing an INFINITI Q70 MAF Sensor
- Frequently Asked Questions (FAQ)
- 🎟️ Get 5% Off