Nissan Almera Engine Crankshaft Position Sensor Guide (2001-2005)
If your Almera is stalling or won't start, the crankshaft position sensor is a likely culprit.
- A bad crankshaft sensor is a very common cause of stalling and no-start issues in the 2001-2005 Almera, often logging a P0335 code.
- Before replacing the sensor, be aware that a stretched timing chain can cause the same symptoms and error code on this specific vehicle.
- For best results, use a high-quality aftermarket brand like NGK or Standard Ignition, as cheap sensors are known to cause issues on these Nissans.
- Consider replacing the camshaft position sensor(s) at the same time to prevent future problems, a practice recommended due to related recalls on similar engines.
Is Your Almera Stalling? Understanding Crankshaft Sensor Failure
A failing crankshaft position sensor in the 2001-2005 Nissan Almera (N16 generation) is a common issue that can cause serious headaches. The symptoms often appear suddenly and can range from an illuminated Check Engine Light to the engine completely shutting off while driving. Because this sensor is essential for engine timing, a bad sensor can make the car difficult to start or leave you stranded.
Symptoms of a Bad Crankshaft Position Sensor
Watch for these common signs of failure. A diagnostic scan will often show the code P0335, which points directly to a malfunction in the crankshaft position sensor circuit.
🎬 Learn more about diagnosing the P0335 fault code and its causes.- Engine Stalls Unexpectedly: The most critical symptom is the engine cutting out, often at low speeds or when idling at a stop light. The engine may restart after cooling down for several minutes.
- Difficulty Starting: The engine may crank for a long time before it finally starts, or it may not start at all. This problem can be intermittent and may be worse when the engine is hot.
- Check Engine Light: A P0335 trouble code is a clear indicator, but the light can come on for other related issues caused by the failing sensor.
- Rough Running and Misfires: The engine may vibrate, run poorly, and lack power because the computer can't time the spark and fuel correctly.
A Note on Stretched Timing Chains
For the N16 Almera, a P0335 code doesn't always mean the sensor is bad. These cars are also known for having issues with stretched timing chains. A loose chain can cause the crankshaft and camshaft signals to go out of sync, triggering the same error code. If you replace the sensor and the problem persists, the timing chain should be inspected by a qualified mechanic.
Choosing Your New Aftermarket Sensor
When it comes to electronic sensors on Nissans of this era, quality matters. While budget parts are available, many owners and mechanics report that using a low-quality aftermarket sensor can lead to continued problems or premature failure. It's often recommended to use either an OEM part or a high-quality aftermarket equivalent from a reputable brand.
Here's a breakdown of the available brands:
- NGK (NTK): As a major OEM supplier for many Japanese brands, NTK (the sensor division of NGK) is widely considered a top-tier choice. Their sensors are known for robust design and reliability, making them a safe bet for a long-term fix.
- Standard Ignition (SMP): Standard Motor Products is a well-established brand that produces reliable aftermarket parts. Their sensors are generally considered a solid mid-to-high-tier option and undergo extensive testing.
- Walker Products: Walker is another established brand offering sensors that meet or exceed OE specifications. They are often a good balance of quality and value. Walker also notes the historical recall on some Nissan engines and recommends replacing cam and crank sensors together.
- Global Parts & True Tech: These brands may be private-label or value-oriented options. While they offer a cost-effective solution, their long-term reliability may not be as proven as brands like NGK or Standard. They can be a viable choice for a budget repair, but be aware of the potential for inconsistent quality.
Cost of a New Crankshaft Position Sensor (2001-2005 Nissan Almera)
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Sensor | $28.80 - $47.76 |
| Shop Labor | $75 - $150 |
| Total Estimated Cost | $103.80 - $197.76 |
Note: Prices are estimates and may vary based on your location, the specific brand chosen, and the repair shop's labor rates.
Frequently Asked Questions
Where is the crankshaft position sensor located on a 2001-2005 Nissan Almera?
The crankshaft position sensor is located on the back of the engine block, near where the engine meets the transmission. It is typically accessed from underneath the car. 🎬 Watch this video to see the exact sensor location on the engine. It is held in by a single 10mm bolt.
Can I replace the crankshaft sensor myself?
Yes, this is a feasible DIY job for someone with basic mechanical skills. You will need to safely raise the vehicle to access the sensor from underneath. The job involves disconnecting the electrical connector, removing one 10mm bolt, and carefully wiggling the old sensor out. 🎬 See a step-by-step guide on how to remove the old sensor. It can be in a tight spot, so patience is key.
Was there a recall for the Almera crankshaft position sensor?
There was a major recall (ID R3022 / NHTSA 07V-527) for crankshaft and camshaft sensors on many Nissan vehicles from the early 2000s, including models with the QG18DE engine used in some Almeras. The recall addressed sensors that could fail when hot, causing the engine to stall. While the Almera itself may not have been officially recalled in all markets, it uses the same affected parts and suffers from the same defect.
What happens if I use a cheap aftermarket sensor?
While it might work initially, many Nissan owners have found that cheap, unbranded sensors can cause persistent issues like hard starting, incorrect readings, or fail completely in a short amount of time. For a critical part like this, investing in a quality brand like NGK or Standard Ignition is highly recommended to avoid doing the job twice.
Helpful Videos
Technical Specifications
OEM Part Numbers: 23731-4M500 23731-4M50B 23731-4M505 23731-4M50C 23731-6J90B
Hall-Effect Sensor, 10mm bolt mount, 3-pin connector.
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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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