Buick LaCrosse (2005-2019) Manifold Absolute Pressure (MAP) Sensor Guide
Learn to spot a failing MAP sensor in your LaCrosse and choose the right aftermarket replacement to restore engine performance and efficiency.
- A failing MAP sensor commonly causes a Check Engine Light with codes P0106, P0107, or P0108.
- Symptoms include rough idle, poor gas mileage, and hesitation, which can mimic other engine problems.
- Replacement is a simple DIY job for most owners, typically taking less than 15 minutes.
- ACDelco and Delphi are OEM-quality brands, while Bosch and NGK offer reliable aftermarket alternatives.
Is Your LaCrosse's MAP Sensor Failing?
A faulty Manifold Absolute Pressure (MAP) sensor can cause a variety of engine problems that might seem serious. Because the sensor provides key data for the air-fuel mixture, a bad signal can make your car run poorly. Symptoms often get worse over time. 🎬 Watch this video to learn more about bad MAP sensor symptoms. Ignoring them can lead to reduced fuel economy and potential damage to other components like the catalytic converter due to an overly rich fuel mixture.
Choosing the Right Aftermarket MAP Sensor
When replacing the MAP sensor on your LaCrosse, you have several good aftermarket options. You don't necessarily need to buy the most expensive part to get a reliable sensor.
- Premium Aftermarket (OEM-Equivalent): Brands like ACDelco and Delphi are top choices. ACDelco is the original equipment manufacturer for GM, so their parts are a direct replacement for what your car was built with. Delphi was a long-time GM supplier, and their sensors are also considered OE-quality, often identical to the original part.
- Quality Aftermarket: Brands such as Bosch, NGK/NTK, and Standard Ignition (SMP) offer excellent quality and reliability. These companies are major OEM suppliers for other car manufacturers and have a strong reputation for producing durable electronic components that meet or exceed factory specifications.
- Standard/Economy Tier: Brands like Holstein, Walker Products, and others offer a more budget-friendly option. While they can be a good value, it's important to choose a reputable seller. For a critical sensor like the MAP, sticking with the premium or quality aftermarket tiers is often the safest bet for long-term reliability.
Cost of a New MAP Sensor for Buick LaCrosse (2005-2019)
| Category | Estimated Cost |
|---|---|
| New Aftermarket Part | $39.20 - $107.88 |
| New OEM (ACDelco) Part | $45 - $125 |
| Shop Labor for Installation | $38 - $56 |
Known Issues & Recalls
Searches for official recalls and technical service bulletins (TSBs) related specifically to the MAP sensor on the 2005-2019 Buick LaCrosse did not yield any results. While there are recalls for other issues on these vehicles, the MAP sensor itself has not been the subject of a specific recall campaign. However, some GM TSBs for other models mention that DTC codes like P0106, P0107, and P0108 can be caused by 🎬 See how to test and replace a sensor with these codes. a faulty MAP sensor, requiring replacement.
Frequently Asked Questions (FAQ)
Where is the MAP sensor located on my Buick LaCrosse?
The location varies slightly by engine. On the 3.8L V6 (2005-2009), it's typically on the front of the upper intake manifold. For the 3.6L V6 (2010-2019), the MAP sensor is located on the top of the intake manifold, making it very easy to access. 🎬 Watch a step-by-step replacement guide for the 3.6L Buick engine. It is usually held in place by a single bolt or clip.
Can I clean the MAP sensor instead of replacing it?
While some people attempt to clean MAP sensors with an appropriate electronic or MAF sensor cleaner, it is often not a permanent solution. The sensors can fail internally, and cleaning will not fix an electrical fault. If the sensor is contaminated with oil or carbon, cleaning might provide a temporary fix, but replacement is the only guaranteed solution for a faulty sensor.
What are common ordering mistakes for this part?
The biggest mistake is ordering the wrong sensor for your engine. The 2005-2019 LaCrosse used several different engines (e.g., 3.8L V6, 2.4L I4, 3.0L V6, 3.6L V6). Always verify the part fits your specific year and engine combination before purchasing. Do not confuse the MAP sensor with the Mass Airflow (MAF) sensor, which is located on the air intake tube after the air filter.
Do I need to reset the computer after replacing the MAP sensor?
After replacing the sensor, it is recommended to clear the trouble codes from the ECU using an OBD2 scanner. You can also disconnect the battery's negative terminal for about 15 minutes to reset the system. This allows the computer to relearn its fuel trim strategy with the new, accurate sensor data.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12711681 12575467 55573248 19418808 12615223 12650600 213-796
The MAP sensor for the Buick LaCrosse is a small, plastic-bodied electronic sensor, typically with a 3-pin blade-style electrical connector. It mounts directly to the intake manifold with a single bolt and uses an O-ring to seal.
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.
- Buick LaCrosse: