Chevrolet Impala (2007-2020) Manifold Absolute Pressure Sensor Guide
Solve rough idling and poor gas mileage in your Impala by understanding and choosing the right MAP sensor.
- A bad MAP sensor commonly causes rough idle, poor gas mileage, and hesitation in an Impala.
- Replacement is a simple, beginner-friendly DIY job that usually takes less than 30 minutes.
- Before replacing, check for simple issues like vacuum leaks or wiring problems, which can cause similar symptoms.
- Choose a quality aftermarket brand like ACDelco, Bosch, or Delphi for OEM-level reliability.
Is Your Impala Running Rough? It Could Be the MAP Sensor.
A failing Manifold Absolute Pressure (MAP) sensor can cause a surprising number of problems in your 2007-2020 Chevrolet Impala. Since this sensor directly impacts the air-fuel mixture and ignition timing, a bad signal can throw everything off. Symptoms often start small but can become more serious, affecting drivability and fuel costs. 🎬 Watch: 8 common symptoms of a bad MAP sensor Fortunately, this is a part that is relatively inexpensive and easy to replace for most DIY mechanics.
🎬 See this step-by-step MAP sensor replacement walkthroughChoosing the Right Aftermarket MAP Sensor
When replacing the MAP sensor, you don't have to go back to the dealer. The aftermarket offers a wide range of quality parts that meet or exceed OEM specifications. Here’s how to break down your options:
- Premium Aftermarket (OEM-Tier): Brands like ACDelco (the original GM supplier), Bosch, and Delphi are top choices. They often manufacture the original parts, so you can expect excellent fit, reliability, and performance. These are engineered to meet rigorous standards for your Impala.
- Quality Aftermarket: Brands such as NGK/NTK, Standard Motor Products (SMP), and Spectra Premium offer a great balance of quality and value. They are well-regarded in the industry and produce reliable sensors that are a solid choice for most owners.
- Value-Oriented Brands: Companies like Walker Products, Facet, and other store brands (e.g., Carquest) provide a cost-effective solution. While they can get your car back on the road, long-term durability might vary compared to premium options. Always check reviews and warranty information.
Cost of a New MAP Sensor for 2007-2020 Impala
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $39.20 - $89.28 |
| New OEM (GM Genuine / ACDelco) | $30.00 - $75.00 |
| Shop Labor | $70 - $140 |
Note on Part Differences: The 2007-2020 Impala spans two different generations. The 9th Gen (2007-2013) and 10th Gen (2014-2020) use different engines (e.g., 3.5L/3.9L V6 vs. 2.5L I4/3.6L V6). Always confirm the part number fits your specific year and engine to avoid ordering mistakes.
Frequently Asked Questions (FAQ)
Where is the MAP sensor located on my Impala?
The location varies slightly by engine. For the 9th Gen (2006-2013) with the 3.5L V6, it's on the right side of the intake manifold. For the 10th Gen (2014-2020) with the 2.5L engine, it's at the back of the engine on the bottom of the intake manifold. 🎬 Watch: 2014-2020 Impala 2.5L MAP sensor location and replacement It is typically a small black plastic sensor held in by one or two bolts with an electrical connector.
Do I need to clear the Check Engine Light after replacing the sensor?
Yes. After replacing the MAP sensor, the trouble code stored in the ECU needs to be cleared with an OBD2 scanner. In some cases, after a number of successful drive cycles without the fault reoccurring, the light may turn off by itself, but clearing it immediately is the best practice.
Are there any recalls for the Impala MAP sensor?
There are no specific recalls for the MAP sensor itself. However, NHTSA has issued Technical Service Bulletins (TSBs) for some 2012-2013 Impala models related to engine wiring harness issues that could cause MAP sensor-related codes (like P0106) and other electrical problems. The harness could rub against the transmission, causing wires to chafe. If you have recurring sensor codes, a wiring inspection might be necessary.
Can I clean the MAP sensor instead of replacing it?
Sometimes, cleaning the sensor port can resolve an issue if it's clogged with carbon buildup. You can remove the sensor and gently clean it with a dedicated electronic parts or mass air flow sensor cleaner. However, if the sensor's internal electronics have failed, cleaning will not help and replacement is the only option.
Helpful Videos
Technical Specifications
OEM Part Numbers: 55573248 12591290 213-4681 0261230282
Typically a 3-pin sensor that mounts directly to the intake manifold.
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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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