INFINITI M35 (2006-2010) Crankshaft Position Sensor: A Complete Guide
Resolve common stalling, hard starting, and performance issues by understanding the crankshaft position sensor in your M35.
- A failing crankshaft sensor is a common cause of stalling and no-start issues on the 2006-2010 M35, typically triggering code P0335.
- For reliable repair, it is strongly recommended to use the OEM brand (Hitachi) or a premium aftermarket brand like Denso.
- Before replacing parts, check if your vehicle was serviced for the accelerator pedal position sensor recall, which causes similar stalling symptoms.
- The sensor is located on the passenger side where the engine meets the transmission and is accessible from underneath the car.
Is Your INFINITI M35 Stalling or Refusing to Start?
A failing crankshaft position sensor is a very common issue on the 2006-2010 INFINITI M35 and its VQ-series engine. When this small sensor fails, it can cause major problems, including leaving you stranded. Understanding the symptoms and choosing the right replacement part is crucial, as these engines are known to be sensitive to sensor quality.
Symptoms of a Failing Crankshaft Position Sensor
If your M35's crankshaft sensor is going bad, you will likely experience one or more of the following issues:
- Engine Stalls Unexpectedly: The engine may shut off while you are driving, often when coming to a stop or when the engine is hot. This is a serious safety risk.
- Hard Starting or No Start: You may find the engine cranks for a long time before it starts, or it may not start at all. The starter will turn the engine over, but it won't fire up.
- Check Engine Light: A faulty crankshaft sensor will almost always trigger the Check Engine Light. The most common trouble code associated with this failure is P0335 (Crankshaft Position Sensor "A" Circuit Malfunction).
- Rough Engine Performance: You might notice rough idling, engine vibrations, misfires, and a general lack of power or poor acceleration.
- Erratic Tachometer: In some cases, the RPM gauge on your dashboard may behave erratically or drop to zero while the engine is still running.
Important: Check for the Accelerator Pedal Recall
The 2006-2010 INFINITI M35 was subject to a recall (NHTSA Campaign ID: 13V430000) for a faulty accelerator pedal position sensor. The symptoms, including stalling at idle, are very similar to a bad crankshaft sensor. Before replacing parts, it is wise to contact an INFINITI dealer with your VIN to see if this recall service was performed on your vehicle.
🎬 Watch this before replacing the sensor to avoid common mistakes.Choosing the Right Aftermarket Crankshaft Sensor
For most cars, a standard aftermarket part is a fine choice. However, for this specific sensor on the INFINITI M35, owner and mechanic feedback is very clear: quality matters immensely. The VQ engine is notoriously "picky" about its electronic sensors.
Brand Quality Tiers
- Tier 1: OEM / Premium Aftermarket (Recommended)
These brands are either the original equipment manufacturer (OEM) or are known for equivalent quality. Choosing from this tier gives you the highest probability of a long-lasting, trouble-free repair. Forum discussions are filled with owners who had issues with cheaper brands that were resolved by switching to one of these.- Hitachi: This is the Original Equipment Manufacturer (OEM) for Nissan/INFINITI. Choosing Hitachi is the safest bet for guaranteed compatibility and reliability.
- Denso: A top-tier Japanese parts supplier known for excellent quality and precision. Denso sensors are highly regarded and are a reliable alternative to OEM.
- NGK (NTK): While famous for spark plugs, their sensor line (NTK) is also considered a high-quality, OEM-level option.
- Tier 2: Standard Aftermarket
These brands can be a budget-friendly option, but they come with a higher risk of premature failure or being dead-on-arrival for this specific application. While brands like Standard Ignition, Walker, and Dorman produce a wide range of parts, they are not recommended for the M35's crank sensor unless you are prepared for the possibility of having to do the job again.
Pro Tip: Given the relatively low cost of the part and the critical safety function it performs, spending a little extra on a Hitachi or Denso sensor is a wise investment to avoid future headaches and dangerous stalling situations.
Replacement Cost
The cost to replace the crankshaft position sensor on a 2006-2010 M35 can vary based on who does the work and the brand of the part.
| Item | Estimated Cost |
|---|---|
| Shop Labor | $80 - $160 |
| New Aftermarket Part | $34 - $99 |
| New OEM Part (Hitachi) | $80 - $130 |
| Total Estimated Cost (Shop) | $114 - $290 |
Frequently Asked Questions (FAQ)
Where is the crankshaft position sensor located on the 2006-2010 M35?
The crankshaft position sensor is located on the lower passenger side of the engine, at the point where the engine block meets the transmission bellhousing. It is accessed from underneath the vehicle after removing the plastic splash shield. It is held in by a single 10mm bolt.
🎬 See this walkthrough for removing the sensor on VQ engines.Can I replace this sensor myself?
Yes, this is a job many M35 owners can do at home. It requires safely lifting the front of the vehicle, removing the splash shield, and accessing a single bolt and electrical connector. The main challenge is the tight space. It typically takes between 30 minutes to an hour.
🎬 Watch a step-by-step guide to replacing the P0335 sensor.Is it safe to drive with a bad crankshaft sensor?
No, it is not recommended. The risk of the engine stalling at any time, such as in an intersection or on the highway, is a significant safety hazard. If you suspect the sensor is failing, you should have the vehicle inspected and repaired as soon as possible.
My car has a P0335 code, but I already replaced the sensor. What now?
If the P0335 code returns after replacement, the most common reason is the use of a low-quality aftermarket sensor. The first step should be to replace it with an OEM Hitachi or Denso sensor. If the problem persists, you should inspect the wiring harness and connector for damage, corrosion, or oil contamination, and ensure the sensor is fully seated with no debris blocking it.
Helpful Videos
Technical Specifications
OEM Part Numbers: 23731-AL616 23731-JA10B 23731-AL60C 23731AL60E
The sensor is a Hall Effect or Magnetic Resistant Element (MRE) type sensor held in place by a single 10mm bolt, with a single electrical connector.
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 M35: