Chevrolet Impala Camshaft Position Sensor Guide for 2007-2011 Models
Solve stalling, no-start, and poor performance issues on your Impala's 3.5L or 3.9L V6 engine.
- Your 2007-2011 Impala has one camshaft position sensor located under the power steering pump.
- The most common cause of failure is a power steering fluid leak that drips onto the sensor; you must fix the leak.
- Replacement is difficult for beginners because the power steering pump must be moved for access.
- Using an OEM (ACDelco) or premium aftermarket brand (Delphi, SMP) is highly recommended for reliability.
Is Your Impala's Camshaft Position Sensor Failing?
A bad camshaft position sensor in a 2007-2011 Impala can cause frustrating and sudden engine problems. Because the sensor is critical for engine timing, a bad signal can make your car run poorly or not at all. The most common sign is the Check Engine Light turning on, but you will likely notice other performance issues as well.
Known Issue: Power Steering Fluid Leaks
For the 2007-2011 Impala with the 3.5L and 3.9L V6 engines, the most common cause of camshaft position sensor failure is a leak from the power steering pump or its hoses. The sensor is located directly below the power steering pump, and leaking fluid will drip onto the sensor and its electrical connector, causing it to short out and fail. Before replacing the sensor, you must inspect for and repair any power steering fluid leaks. If you install a new sensor without fixing the leak, the new part will likely fail again in a short time.
Choosing the Right Aftermarket Sensor for Your Impala
When buying a new aftermarket sensor, you have a few quality tiers to choose from. For a critical sensor like this, sticking to a higher-quality brand is often worth the small extra cost to avoid future headaches.
- OEM / Premium Brands (ACDelco, Delphi): ACDelco is the original GM parts brand, offering a guaranteed fit and performance just like the factory part. Delphi is another top-tier manufacturer that often makes original parts for GM and provides the same level of quality and reliability. These are the most recommended choices for a trouble-free repair.
- Quality Aftermarket (Standard Motor Products, NGK/NTK): Brands like Standard Motor Products (SMP) and NGK have a strong reputation for producing reliable sensors that meet or exceed OE specifications. They are excellent alternatives to the OEM part.
- Standard Aftermarket (Duralast, Dorman, SKP): These brands offer a good balance of value and quality. They are widely available and are a dependable option for a budget-conscious repair, but some professional mechanics prefer the proven long-term reliability of OEM or premium brands for engine sensors.
Cost to Replace the Camshaft Position Sensor
| Part / Service | Estimated Cost |
|---|---|
| New OEM Part (ACDelco) | $45 - $70 |
| New Aftermarket Part | $20 - $50 |
| Shop Labor | $180 - $300 |
| Total Professional Replacement | $225 - $370 |
Note: The labor cost is higher than for many other vehicles because the power steering pump must be removed to access the sensor. This adds 1-2 hours to the repair time.
Frequently Asked Questions
How many camshaft position sensors does my 2007-2011 Impala have?
The 2007-2011 Impala models with the 3.5L or 3.9L V6 engines have only one camshaft position sensor.
Where is the camshaft position sensor located?
The sensor is on the front of the engine block, tucked underneath and behind the power steering pump.
Can I replace this sensor myself?
This is a job for an experienced DIYer. While it only requires basic tools like an 8mm and 13mm socket, you must unbolt and move the power steering pump out of the way to get to the sensor. This makes the job more complex than a typical sensor replacement. If you are not comfortable with that step, it is best to leave this job to a professional.
Could something else cause the same symptoms?
Yes. A widespread ignition switch recall on 2006-2014 Impalas can cause the engine to shut off while driving, which feels like a stall from a bad sensor. It's worth checking if your vehicle has had this recall service performed. Additionally, issues with the crankshaft position sensor can cause similar starting and running problems.
Helpful Videos
Technical Specifications
OEM Part Numbers: 213-4402 12597253
Single bolt (8mm) mount, 3-pin electrical connector.
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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