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If your Buick Regal is experiencing rough idle, stalling, or poor throttle response, the mass air flow sensor could be a likely culprit. Choosing the right mass air flow sensor matters because the part directly affects air/fuel metering, engine performance, and emissions control. This guide covers the top shortlisted options for the Buick Regal, selected for correct fitment and reliable signal output. We evaluated each option for fit, electrical compatibility, build quality, and expected service life. Read on to see which sensors made the list and why they might suit your needs.
Looking for other parts? See all Buick Regal parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | AdvanEX Mass Air Flow Sensor for Buick Regal (Replacement MAF) |  |
| Best Quality Built to a higher standard if you want something more solid | AOTPAT Mass Air Flow Sensor (fits Buick Regal/LeSabre/V6 3.8L) |  |
| Best Budget The cheapest option that still gets the job done reliably | TUOKUNTU Mass Air Flow (MAF) Sensor for Buick Regal (direct replacement) |  |
| Most Sold A high-volume bestseller chosen again and again | ACROPIX Mass Air Flow Sensor (Fits Buick Regal) |  |
| Best Value for Money The sweet spot between price and what you get | A-Premium Mass Air Flow Sensor for 3.8L V6 |  |
| Best Overall The best all-around choice for most situations | UNITHUB Mass Air Flow Sensor UH-MAF11084 (2451103 / 12576410) Compatible with Buick Regal |  |
1. AdvanEX Mass Air Flow Sensor for Buick Regal (Replacement MAF)
| Maximum Supply Voltage | 12 Volts |
|---|---|
| Output Type | Digital |
| Mounting Type | Flange Mount |
| Upper Temperature Rating | 150 Degrees Celsius |
This AdvanEX mass air flow sensor is a factory-replacement style unit intended to restore proper air measurement and fuel metering on Buick Regal vehicles. It installs in the intake air stream and feeds a digital signal to the engine computer so the vehicle can correct air/fuel mixture and idle behavior. The sensor uses a flange mount, digital output and is built with high-temperature molded PBT and a laser-trimmed circuit board for stable readings. In practice this means it can clear check-engine lights caused by a failed MAF and return drivability and fuel economy to expected levels when the original sensor is bad. Buyers should note that quality appears mixed across users: many report straightforward installs and immediate fixes, while a minority report premature failure after a few months. Also you should clean the air box and replace the intake filter before installation because contamination can cause lingering codes even with a new sensor. For reliability-focused buyers this is a budget-friendly, OEM-style replacement that often works well but may not match long-term life of higher-end branded sensors.
Best for: Reliability-focused buyers who prioritize restoring correct engine performance on a Buick Regal without major expense and who prefer a straightforward, factory-style replacement.
Less Ideal for: Drivers who need a long-term, heavy-duty upgrade or who prefer parts with extended manufacturer-backed warranties should consider premium OEM or OE-quality alternatives.
- Designed as a direct-fit replacement for Buick Regal to restore proper air/fuel control
- Digital output and laser-trimmed circuitry aim to provide accurate airflow readings
- High-temperature molded PBT construction for durability in the engine bay
- Easy to install flange-mount design that matches factory mounting style
- Some users report limited long-term reliability with failures after a few months
- Not backed by explicit warranty details in the provided product information
Verdict A budget-friendly, factory-style MAF replacement that often fixes drivability and check-engine issues on the Buick Regal but may fall short of premium long-term durability.
2. AOTPAT Mass Air Flow Sensor (fits Buick Regal/LeSabre/V6 3.8L)
| Measurement Accuracy | ±2% |
|---|---|
| Mounting Type | Flange Mount |
| Output Type | Electrical signal (Push-Pull) |
| Specific Uses For Product | Compatible for Buick LeSabre 1999-2005, Regal 1999-2004, Riviera 1999; Fit V6 3.8L |
| Material Type | Metal, Plastic |
This AOTPAT mass air flow sensor replaces the factory sensor on 3.8L V6 Buicks such as the Regal and LeSabre and measures incoming air to help the engine control unit set the correct air/fuel ratio. It mounts in the intake tract and delivers an electrical push-pull output signal with stated ±2% measurement accuracy, which should restore smooth idle response and throttle transitions when an aging MAF has drifted. Typical use is a direct replacement during routine diagnostics for rich/lean running or a check-engine code related to airflow. The sensor is described as flange-mount, weather-resistant, and quick to respond, and the metal and plastic construction makes it robust for under-hood conditions. Practical benefits include straightforward bolt-in installation for DIYers and compatibility with the factory electrical connector and signal type. Limitations are that fitment is specific to older 3.8L applications so confirm vehicle compatibility, and as with many aftermarket sensors occasional calibration differences can require cleaning of the intake or an ECU relearn to reach factory-like behavior.
Best for: Performance-oriented buyers seeking a quality aftermarket replacement to restore correct air metering and crisp throttle response on a Buick Regal with the 3.8L V6.
Less Ideal for: Drivers who want a multi-vehicle or modern plug-and-play upgrade across many engine types should look for a different, more widely compatible sensor option.
- Designed for 3.8L V6 Buick Regal/LeSabre applications so it matches common fit points
- Stated ±2% measurement accuracy for precise airflow readings
- Flange-mount design with push-pull electrical output for direct replacement of the factory sensor
- Weather-resistant construction and metal/plastic build suited to engine-bay conditions
- Fitment limited to specific late 1990s–early 2000s 3.8L applications and not universal
- May require intake duct and air filter cleaning or ECU relearn to eliminate lingering drivability issues
Verdict AOTPAT's MAF provides a near-accurate, weather-resistant direct replacement for 3.8L Buick Regals to restore proper air metering and throttle response.
3. TUOKUNTU Mass Air Flow (MAF) Sensor for Buick Regal (direct replacement)
| Maximum Supply Voltage | 12 Volts (DC) |
|---|---|
| Mounting Type | Plug Mount |
| Output Type | electrical signal |
| Upper Temperature Rating | 125 Degrees Celsius |
This TUOKUNTU mass air flow sensor is a plug‑and‑play replacement intended to restore proper air-measurement and engine control on compatible Buick Regal vehicles. It installs in minutes using the factory connector and mounting tabs, so typical DIYers can swap it without special programming. The product listing cites metal construction, factory-style plug mount, a 12 V supply rating, and an upper temperature rating of 125°C, which together suggest the unit is built to withstand typical under‑hood conditions. In real use the sensor corrects common symptoms such as rough idle, throttle hesitation, and check-engine codes related to airflow, with many owners reporting improved driveability and slightly better fuel economy after installation. Limitations: this is an independent aftermarket part rather than a dealer-sourced module, so long-term durability may vary and you should verify compatibility with your specific Regal year and engine before ordering. Also the listing provides one year of after-sales support rather than an extended warranty.
Best for: Budget-conscious owners seeking a low-cost, easy DIY fix to restore driveability and stop MAF-related check-engine issues on their Buick Regal.
Less Ideal for: Owners who prefer dealer-sourced or OEM-branded parts for maximum long-term assurance or those unwilling to verify exact year/engine fitment before buying.
- Direct plug‑and‑play fit for listed Buick Regal applications for quick DIY installation.
- Metal housing and factory-style mounting suggest solid build and under‑hood durability.
- Rated for 12V systems and up to 125°C for typical engine compartment conditions.
- Multiple user reports of resolved rough idle, improved throttle response, and restored fuel economy.
- Aftermarket unit rather than factory-branded part so long-term reliability can vary between vehicles.
- Compatibility must be confirmed by year/engine since fitment is model-specific and the listing covers many GM vehicles.
Verdict A wallet-friendly, plug‑and‑play MAF replacement that restores driveability for Buick Regal owners who want a low-cost DIY repair, provided you confirm exact fitment.
4. ACROPIX Mass Air Flow Sensor (Fits Buick Regal)
| Measurement Accuracy | ±3.5% |
|---|---|
| Mounting Type | Surface Mount |
| Output Type | Digital |
| Material Type | Metal, Plastic |
This ACROPIX mass air flow sensor is a direct-replacement unit marketed to fit several Buick applications, including the Buick Regal 3.1L from the mid-1990s. It measures intake air and sends a digital signal to the engine control unit so fuel delivery and idle can be corrected. Installation is typical for a plug-and-play sensor: locate the original MAF near the air intake box, unplug the connector, swap the sensor, and secure the mounting. The listing notes a surface-mount design, digital output, and claimed measurement accuracy of ±3.5 percent, which, if achieved, helps restore correct air/fuel mixture and can reduce rough idle, poor acceleration, and excess exhaust smoke. Construction uses metal and plastic components intended to match factory fit. Limitations are that fitment is limited to specific older Buick engines and the listing provides a model reference rather than vehicle-by-vehicle verification, so confirm connector type and mounting before purchase.
Best for: Risk-averse mainstream buyers who prioritize restoring reliable factory-like operation on an older Buick Regal and prefer parts that aim for straightforward replacement and predictable results.
Less Ideal for: Drivers looking for wide multi-year compatibility or performance-tuning airflow sensors should consider alternatives with broader fitment or higher-spec measurement accuracy.
- Direct-replacement design for compatible Buick applications for easier installation
- Digital output with stated ±3.5% measurement accuracy for reasonably precise airflow readings
- Surface-mount construction and factory-style materials intended to match original fit and durability
- Fitment appears targeted to older Buick engines only and may not suit other model years or engine variants
- Listing provides a model number reference rather than detailed vehicle connector confirmation
Verdict A practical, direct-replacement MAF sensor aimed at restoring factory-like airflow readings on compatible Buick Regal engines, provided you confirm connector and mounting match your vehicle.
5. A-Premium Mass Air Flow Sensor for 3.8L V6
| Maximum Supply Voltage | 12 Volts |
|---|---|
| Mounting Type | Bolt-on |
| Output Type | NPN, PNP, Push-Pull |
| Terminal Quantity | 3 |
This A-Premium mass air flow sensor is a straightforward replacement designed to plug into the intake on 3.8L V6 GM engines and restore accurate air-flow measurements. Typical use is direct swap-in during a check-engine or drivability repair to eliminate hesitation, rough idle, or fuel trim faults caused by a failing MAF. The sensor offers bolt-on mounting, three blade terminals and supports common output types (NPN, PNP, push-pull), which makes it compatible with the factory wiring and engine management on affected 3.8L cars. Buyers will appreciate that it is made to match OEM form and function, claims fast fault clearance, and comes with a one-year unlimited-mileage guarantee. The main limitations are variable longevity reported by users and that aftermarket fitment can sometimes differ from factory parts, so careful comparison with your original unit is advised before installation. For a practical, budget-conscious repair this sensor often restores drivability quickly, but those seeking longest-term durability may prefer higher-end branded replacements.
Best for: Practical optimizers looking to fix drivability issues on a Buick Regal 3.8L without overspending and who prioritize quick, cost-effective repairs.
Less Ideal for: Buyers seeking the highest-end longevity or dealers doing warranty-level service should consider premium branded or dealer-sourced replacements instead.
- Direct bolt-on replacement for 3.8L V6 intake systems
- Supports NPN, PNP and push-pull outputs to match factory wiring
- Manufactured to match OEM specifications for form and electrical function
- One-year unlimited-mileage guarantee included
- Some users report premature failures after a few months
- Aftermarket construction may not match the longest-lasting factory-quality units
Verdict A budget-friendly, plug-and-play MAF that typically restores drivability on Buick Regal 3.8L V6s but may show variable long-term durability.
6. UNITHUB Mass Air Flow Sensor UH-MAF11084 (2451103 / 12576410) Compatible with Buick Regal
| Maximum Supply Voltage | 14 Volts |
|---|---|
| Measurement Accuracy | ±1.5% |
| Measuring Range | 0-1000 grams per second |
| Response Time | 15 Milliseconds |
| Output Type | Digital |
This UNITHUB mass air flow sensor is a straightforward factory-replacement style unit for Buick Regal applications using the listed interchange numbers. It measures intake air flow digitally and reports it to the engine control system with a claimed ±1.5% accuracy and a 15 millisecond response time, which helps the ECU maintain correct fuel trims and idle behavior. Installation is typical for a MAF sensor: unplug the electrical connector, remove the flange-mounted sensor from the intake tract, and fit the replacement; no special programming is normally required. Notable features include a wide measuring range and a fast response that can clear drivability issues caused by a failing sensor and improve fuel economy when operating correctly. Limitations to be aware of are that compatibility must match your Regal's exact part number and connector, and a small number of users reported the part did not resolve problems caused by other faults such as intake leaks or ECU issues. For routine MAF replacement on a Buick Regal this unit offers a cost-effective, factory-style option, but verify fitment before installation.
Best for: Balanced all-round buyers who want a cost-effective, factory-style replacement to restore proper airflow readings and normal drivability on a Buick Regal.
Less Ideal for: If you need a high-performance or calibrated aftermarket sensor for tuning, or if your Regal has unresolved intake or ECU faults, look for specialized diagnostics or performance-grade options instead.
- Digital output with claimed ±1.5% measurement accuracy for consistent airflow reporting
- Fast 15 millisecond response time helps the ECU adapt quickly to throttle changes
- Designed as a flange-mount direct replacement for common Buick Regal MAF part numbers
- Wide measuring range covers typical engine airflow demands for gasoline Regal engines
- Requires exact part-number and connector match for proper fitment
- Does not address drivability issues caused by intake leaks, vacuum problems, or ECU faults
Verdict A budget-friendly, factory-style digital MAF sensor that restores accurate airflow data for Buick Regal owners when the original sensor has failed, provided you confirm part-number compatibility.
Choosing the Right Buick Regal Mass Air Flow Sensor: Key Factors to Consider
Fitment and Connector Compatibility
Physical fit and connector match are critical because a sensor that does not seat correctly or plug into the factory harness will cause fitment issues and potential signal faults.
Check that the sensor’s housing shape, mounting points, and electrical connector match the Buick Regal intake assembly. Even small differences in connector pinouts or clip orientation can require splicing or adapters, which introduce failure points and diagnostic complexity.
Signal Accuracy and Linearity
The sensor must produce accurate, linear voltage or frequency signals across the engine’s operating airflow range so the engine control unit can calculate fuel delivery precisely.
Poor signal accuracy can lead to rich or lean conditions, rough running, and trigger diagnostic trouble codes. Look for sensors with consistent output behavior and minimal drift over temperature ranges typical of engine bays.
Contamination Resistance
MAF sensors sit in the intake stream and are exposed to particulates, oil, and moisture that can degrade sensing elements over time.
Assess whether the sensor design includes protective screens, coatings, or self-cleaning characteristics that reduce buildup. Better contamination resistance extends service intervals and reduces the frequency of cleaning or replacement.
Thermal and Vibration Durability
Engine compartments subject sensors to heat cycles and constant vibration, so thermal stability and mechanical robustness affect long-term performance.
Choose sensors built with materials and internal mounting that resist cracking, connector loosening, and electronic drift when exposed to heat and vibration common in Buick Regal operation.
Installation Ease
Some sensors are near other components or require partial intake removal for access, so installation friendliness matters for do-it-yourself repairs.
Consider whether the unit uses factory-style clips and seals and whether replacement can be completed with basic hand tools. Clear instructions and matching gaskets or seals reduce the risk of vacuum leaks after install.
Serviceability and Maintenance
Knowing whether a sensor can be safely cleaned or must be replaced affects long-term ownership costs and downtime.
Evaluate if the sensor’s design tolerates routine mass airflow sensor cleaning methods without damaging the sensing element. If cleaning is not recommended, plan for periodic replacement intervals based on driving conditions and contamination risk.
FAQ
What are common symptoms of a failing mass air flow sensor on a Buick Regal?
A failing sensor often causes rough idle, hesitation on acceleration, reduced fuel economy, and sometimes stalling. The engine control unit may also store a mass airflow-related trouble code. Symptoms can vary depending on how degraded the sensor signal has become and driving conditions.
Can I clean a dirty MAF sensor instead of replacing it?
Cleaning is often a first step and can restore function when contamination is light. Use a cleaner designed for mass airflow sensors and follow safe, nonabrasive procedures. Deep contamination or damaged sensing elements usually require replacement.
How do I test the mass air flow sensor on a Buick Regal?
Diagnostic checks typically include scanning for related trouble codes, inspecting the connector and wiring, and measuring the sensor’s voltage or frequency output while the engine is running. Test values and procedures depend on the sensor type, so consult repair documentation for expected signal ranges.
Will replacing the mass air flow sensor clear a P0100 code?
Replacing a faulty sensor can resolve a P0100-style code when the root cause is the sensor itself. However, codes may also result from wiring issues, intake leaks, or contamination. Verify connector integrity and intake sealing before assuming replacement is the only fix.
What should I know about installing a mass air flow sensor?
Ensure the replacement matches the Buick Regal’s connector and mounting orientation, use any required gaskets or seals, and avoid touching the sensing element. Tighten mounting hardware to specification and confirm there are no intake leaks after installation.
How often should the mass airflow sensor be inspected or serviced?
Inspection intervals depend on driving conditions and whether you use catch cans or high-oil air filters. Generally, check the sensor during routine intake inspections and clean or replace it if performance symptoms or heavy contamination are present.
How We Chose the Best Buick Regal Mass Air Flow Sensor
We focused on items that offer correct mechanical and electrical fit for the Buick Regal and that deliver consistent, noise-free airflow signals. Key evaluation criteria included connector and housing compatibility with Buick Regal engine bays, sensor output accuracy across expected airflow ranges, resistance to contamination and humidity, and build materials that affect longevity. We also considered ease of installation in typical Buick Regal intake layouts and whether replacement followed OEM electrical pinout standards. Durability under heat cycles and vibration common to Regal duty cycles was assessed as well. We excluded any units lacking clear fitment information for Buick Regal or sensors that required extensive wiring modifications. The result is a list of mass air flow sensors that meet practical service and fit expectations for Buick Regal owners without invasive vehicle changes.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize fitment and signal accuracy when choosing a mass air flow sensor for a Buick Regal, because those factors directly influence engine fueling and drivability. Balance contamination resistance and installation ease against the expected service life to minimize repeat interventions. Remember that diagnostics should confirm the sensor as the root cause before replacing parts. Focus on matching connector and housing details, and consider maintenance needs so you maintain reliable engine performance over time.
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