INFINITI QX56 Camshaft Position Sensor: 2004-2013 Replacement Guide
Solve stalling and starting problems on your QX56 by understanding camshaft sensor failure and choosing the right replacement.
- Verify your model year: 2004-2010 QX56 models use two sensors, while 2011-2013 models use four identical sensors.
- Stick to OEM supplier brands like Hitachi or Denso for this part to ensure reliability and avoid repeat failures.
- Common failure codes are P0340 (Bank 1/Passenger Side) and P0345 (Bank 2/Driver Side).
- Because engine stalling is a primary symptom, it is unsafe to continue driving with a known bad camshaft sensor.
Is Your QX56 Stalling or Hard to Start?
A failing camshaft position sensor is a very common issue on the INFINITI QX56. When this sensor starts to go bad, it sends incorrect data or no data at all to the engine computer. This can cause your engine to suddenly stall while driving, crank for a long time before starting, or not start at all. You will almost always see the 'Service Engine Soon' or 'Check Engine' light on your dashboard.
🎬 Watch: How to test for idle speed changes and stalling.First vs. Second Generation: A Critical Difference
Before buying any parts, you must know which generation of QX56 you own, as the number of sensors is different.
- 2004-2010 QX56 (JA60 body style): These models with the VK56DE engine use two camshaft position sensors located at the back of the engine, near the firewall. 🎬 See this walkthrough for replacing sensors on early models.
- 2011-2013 QX56 (Y62 body style): These models with the VK56VD direct-injection engine have four identical sensors mounted to the front timing cover. While they are the same part, two are for intake cam position and two are for exhaust valve timing control. A failure in any of them can cause problems. 🎬 Watch: Replacing the camshaft sensor on 2011 and newer models.
Early Model Recall
There was an official recall for some early 2004 QX56 models for faulty camshaft and crankshaft sensors that could cause the engine to stall. If you own an early model, it's worth checking with an INFINITI dealer to see if your vehicle was part of this campaign (Recall ID: 03V-455).
Choosing the Right Aftermarket Sensor
For a critical electronic part like this, brand quality matters. Not all aftermarket sensors are created equal, and using a low-quality part can lead to the same problems returning quickly. Forum users and mechanics strongly recommend using OEM or OEM-supplier brands for this specific repair.
Brand Quality Tiers for Your QX56
- Tier 1 (OEM Supplier): Brands like Hitachi and Denso are the original equipment manufacturers for Nissan and INFINITI. Choosing one of these brands is the safest bet for a reliable, long-lasting repair. A Hitachi sensor is often the exact same part you would get from an INFINITI dealer, just in a different box.
- Tier 2 (Reputable Aftermarket): Brands such as Delphi, NGK, and Standard Ignition (SMP) generally have a good reputation for quality and reliability. They are a solid choice if an OEM supplier part is not available.
- Tier 3 (Value Brands): This category includes brands like Dorman, Walker Products, and various store-exclusive brands. While the price is attractive, the quality can be inconsistent for sensitive electronics on INFINITI vehicles. Use with caution and be aware that failure rates may be higher.
Pro Tip: Beware of Fakes
Be very careful when buying from online marketplaces like eBay or Amazon. There are many counterfeit sensors that look like genuine Hitachi or Denso parts, right down to the packaging, but are low-quality fakes. Buying from a reputable auto parts seller is the best way to ensure you get a genuine part.
Replacement Cost
Replacing these sensors is a straightforward job that most DIY mechanics can handle. The sensors are held in by a single 10mm bolt. The main challenge is reaching them, as they are located in tight spaces. Doing it yourself can save you over $100 in labor.
| Part/Service | Estimated Cost |
|---|---|
| Shop Labor | $75 - $150 |
| New Aftermarket Sensor (per sensor) | $21.22 - $136.66 |
| New OEM Sensor (per sensor) | $60 - $175 |
| Total Professional Replacement (per sensor) | $197 - $359 |
Frequently Asked Questions
How many camshaft sensors does my QX56 have?
It depends on the year. 2004-2010 models have two sensors. 2011-2013 models have four sensors. Always verify your vehicle's year and engine before ordering.
Should I replace all the sensors at once?
It is highly recommended. These sensors are exposed to the same heat and conditions, so when one fails, the others are often not far behind. Replacing them all at once, especially on the 2011-2013 models with four sensors, can save you from having to do the same job again in a few months.
Is an OEM sensor really better than aftermarket for the QX56?
For this specific part, yes. The QX56's computer is sensitive to the signal from these sensors. Aftermarket sensors from brands other than the original suppliers (Hitachi, Denso) have a documented history of failing early or not working correctly out of the box in Nissan and INFINITI vehicles.
What happens if I ignore a failing camshaft sensor?
You risk the engine stalling at any time, including at high speeds or in traffic, which is a major safety hazard. You will also experience continued hard starting, rough running, and poor fuel economy. Eventually, the vehicle may not start at all.
Helpful Videos
Technical Specifications
OEM Part Numbers: 23731-1CA1B 23731-1CA1A 23731-AL61A 23731-AL61D 23731-4M50D
Type: Hall Effect Sensor, Connector: 3-Pin
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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 QX56: