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If your Acura TSX is experiencing rough idle, stalling, or poor throttle response, the mass air flow sensor is a common cause. Selecting the right sensor matters because accuracy and fitment directly affect engine fueling, emissions, and drivability. This guide presents five shortlisted mass air flow sensors chosen for compatibility and measurement reliability. We evaluated sensors on accuracy, fitment to the TSX intake system, and expected long-term durability. Read on to see the top picks and the criteria we used to assess them.
Looking for other parts? See all Acura TSX parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | OYEAUTO Mass Air Flow Sensor (AFH70M-41B) |  |
| Best Quality Built to a higher standard if you want something more solid | Denso Mass Air Flow Sensor 197-6170 |  |
| Best Budget The cheapest option that still gets the job done reliably | Yongtoparts Mass Air Flow Sensor (YT-25408) |  |
| Most Sold A high-volume bestseller chosen again and again | ENA Mass Air Flow Sensor (replacement for select Honda/Acura 4‑cyl 2016–2020) |  |
| Best Overall The best all-around choice for most situations | Hitachi MAF0031 Mass Air Flow Sensor |  |
1. OYEAUTO Mass Air Flow Sensor (AFH70M-41B)
| Brand | OYEAUTO |
|---|---|
| Output Type | Digital |
| Response Time | 15 Milliseconds |
| Mounting Type | Flange Mount |
This OYEAUTO mass air flow sensor is a direct-replacement-style unit that measures intake air to keep the engine computer supplied with accurate airflow data. It is sold as a digital, flange-mount sensor with a fast 15 ms response time and is intended for straightforward swap-in installation. In practical use it is typically fitted where a failing MAF has tripped a check engine light, caused rough idle, or reduced fuel economy; users report the part often fits like the factory piece and can clear codes after reconnecting the battery. The manufacturer says each sensor is computer-tested and built to meet factory-spec performance with stable output and improved emissions and fuel efficiency. Limitations to note are mixed user experiences and at least one report of persistent drivability and code issues after installation, so success can depend on exact vehicle condition and correct diagnostics before replacement. Expect a simple DIY install but be prepared to verify fit and clear codes after replacement.
Best for: A reliability-focused buyer who prioritizes restoring proper engine operation and clearing MAF-related drivability issues on a well-maintained Acura TSX, and who prefers a budget-friendly, DIY-replaceable part.
Less Ideal for: Drivers who want a guaranteed factory-origin part or who prefer dealer diagnostics and replacement only, or those unwilling to troubleshoot lingering codes if they appear.
- Designed for flange-mount replacement so it often fits like the factory sensor
- Digital output with a 15 ms response time for quick airflow updates to the ECU
- Described as 100% computer-tested for consistent signal and measurement accuracy
- Simple, quick installation that most DIYers can complete without special tools
- Some customers report intermittent or unresolved check-engine issues after installation
- Not all units may match factory durability or long-term reliability in every vehicle
Verdict A cost-effective, quick-to-install replacement MAF aimed at restoring proper airflow readings on Acura TSX engines, but results depend on correct diagnosis and variable unit-level reliability.
2. Denso Mass Air Flow Sensor 197-6170
| Measurement Accuracy | ±3% |
|---|---|
| Mounting Type | Plug-In |
| Output Type | Digital |
| Upper Temperature Rating | 210 Degrees Fahrenheit |
This Denso mass air flow (MAF) sensor is a factory-quality replacement intended to restore accurate airflow readings and resolve drivability issues on the Acura TSX. Installation is plug-in style so it installs like the factory unit and is intended for direct replacement. The sensor uses a fine platinum wire sensing element with a protective glass coating and an air bypass structure to reduce contamination and improve measurement accuracy, which helps the engine control unit return fuel trims and idle behavior to normal. In practice this means fewer hesitation events, more stable idle, and improved throttle response when the original sensor is failing. The unit is temperature rated and built to match OEM fit and function, but like all MAFs it is sensitive to intake modifications and contamination; correct installation and intake sealing are important. Buyers should also be prepared to clear learned fuel trims or drive the car for an ECU relearn after fitting so performance benefits appear.
Best for: Performance-oriented owners seeking a reliable, factory-quality replacement to restore precise engine control and immediate drivability improvements on their Acura TSX.
Less Ideal for: Drivers planning extensive aftermarket intake modifications or those wanting a cheaper temporary fix rather than a long-term factory-quality replacement should consider alternatives.
- Factory-quality replacement designed to match original fit and function for Acura TSX
- Plug-in mounting simplifies installation and reduces the need for modifications
- Fine platinum wire sensing element with glass coating improves contamination resistance and measurement stability
- Designed to improve fuel trim accuracy and restore drivability and throttle response
- Sensitive to intake system contamination and aftermarket intake changes which can affect readings
Verdict Choose this Denso MAF for OEM-level reliability and accurate airflow readings when you want to restore peak performance on an Acura TSX.
3. Yongtoparts Mass Air Flow Sensor (YT-25408)
| Output Type | Analog |
|---|---|
| Sensing Distance | 50 Millimeters |
| Specific Uses For Product | automotive, high temperature |
| Manufacturer | Yongtoparts |
This Yongtoparts mass air flow sensor is a direct-replacement style unit meant to restore accurate intake airflow readings to the engine control system. For an Acura TSX it functions as a plug-and-play swap to address symptoms like rough idle, poor throttle response, or increased fuel consumption caused by a failing MAF. The unit uses a thermal film sensing element that the manufacturer says gives precise airflow data, and the analog output is compatible with the vehicle's ECU wiring. Installation is straightforward and can typically be completed with basic hand tools in a garage. At this price point you get a practical fix that can clear a check-engine light and return drivability without a dealer visit. Limitations are typical for budget aftermarket parts: long-term durability may not match factory-quality sensors and manufacturer support is limited compared with branded OEM replacements, so expect to verify fitment and monitor performance after installation.
Best for: Budget-conscious owners prioritizing an affordable, do-it-yourself repair to restore TSX drivability and clear MAF-related faults.
Less Ideal for: Drivers who want a long-term OEM-grade replacement or those who prefer dealer-installed parts and warranty-backed components.
- Plug-and-play electrical and mounting fit for compatible vehicles reduces installation time.
- Thermal film sensing element claims to provide accurate intake airflow readings for the ECU.
- Low-cost option to restore drivability and clear MAF-related fault codes.
- Analog output that matches factory sensor signal type for straightforward compatibility.
- May not match long-term durability or calibration stability of factory-quality sensors.
- Limited manufacturer support and shorter expected service life compared with premium replacements.
Verdict A low-cost, plug-and-play MAF replacement that can quickly restore TSX performance but may not match OEM longevity.
4. ENA Mass Air Flow Sensor (replacement for select Honda/Acura 4‑cyl 2016–2020)
| Output Type | electrical signal |
|---|---|
| Pin Count | 4 pins |
| Manufacturer | ENA |
| Model | Mass Air Flow Sensor |
This ENA mass air flow (MAF) sensor is a direct replacement style sensor that measures intake air to help the engine control unit set fuel delivery and ignition timing. It is typically used as a service replacement when a vehicle shows rough idle, poor fuel economy, or a check engine light tied to airflow readings. The unit is sold as a single four‑pin sensor and is positioned to plug into the factory intake duct and electrical connector for straightforward swap‑out installation. ENA advertises accurate airflow signaling to regain proper engine operation and fuel efficiency, and the sensor’s design mirrors factory mounting and connector locations to simplify fitment. Important limitations are that compatibility must be confirmed for the specific vehicle and engine, and this is an aftermarket replacement rather than a factory part which can mean slight differences in long‑term durability between brands. Expect normal diagnostic checks and clearing of stored codes after installation.
Best for: Risk‑averse mainstream buyers seeking a practical, vehicle‑specific replacement to restore reliable drivability rather than tuning or performance upgrades.
Less Ideal for: Do not pick this if you want a guaranteed factory‑branded sensor or a high‑performance aftermarket MAF for tuned engines; consider OEM or performance specialists instead.
- Direct replacement configuration with a four‑pin connector for straightforward installation
- Designed to provide electrical airflow signal to the engine control module to restore fuel trim and idle stability
- Compatible list includes common Honda and Acura 4‑cylinder model years, easing fitment for supported cars
- Sold as a single unit so you can replace only the failed sensor without extra components
- Aftermarket part may differ in long‑term durability compared with factory‑branded sensors
- Fitment must be confirmed for the exact vehicle and engine variant before purchase
Verdict A practical aftermarket MAF that restores factory‑style airflow measurement for supported 4‑cylinder Honda and Acura models, provided you confirm exact fitment.
5. Hitachi MAF0031 Mass Air Flow Sensor
| Maximum Supply Voltage | 12 Volts |
|---|---|
| Mounting Type | Flange Mount |
| Output Type | Digital |
| Manufacturer Part Number | MAF0031 |
| OEM Part Number | 13800-50Z00, 13800-50Z01, 22680-7S000, 22680-7S00A |
The Hitachi MAF0031 is a direct-fit mass air flow sensor built to measure the volume and characteristics of air entering the engine and return accurate digital output to the engine computer. Typical use is as a factory-replacement sensor when an Acura TSX develops MAF-related issues such as rough idle, decreased fuel economy, or diagnostic code P0101. Hitachi states the unit is precision manufactured, calibrated for each application, and 100 percent airflow tested, which in practice means installation usually clears drivability faults and restores stable idle without additional tuning. The built-in contaminant bypass and protected circuitry improve durability versus cheaper aftermarket sensors, and flange-mount design matches factory mounting. Limitations include occasional reports of fitment or quality variance from individual sellers and the fact that replacing the sensor will not cure problems caused by intake leaks, wiring faults, or unrelated engine faults in the TSX. Expect a straightforward swap if the sensor is specified for the TSX model and an ECU reset after installation.
Best for: Balanced, practical owners looking for a factory-quality replacement that restores drivability and fuel economy without extra tuning or modification for an Acura TSX.
Less Ideal for: Drivers seeking a low-cost temporary fix or people who need a universal sensor for multiple vehicle makes should consider other options.
- Factory-calibrated and 100% airflow tested for consistent performance
- Protected circuitry and contaminant bypass port increase longevity compared with basic replacements
- Direct flange-mount design for straightforward installation on compatible vehicles
- Digital output provides clear, consistent signal to the engine computer
- Not a fix for problems caused by intake leaks, damaged wiring, or ECU faults
- Some buyers report occasional quality or fitment issues depending on source
Verdict A calibrated, factory-style replacement MAF that reliably restores TSX drivability when the original sensor is the root cause.
Choosing the Right Acura TSX Mass Air Flow Sensor: Key Factors to Consider
Electrical Calibration and Output
How a sensor translates airflow into an electrical signal determines engine management response. Accurate calibration ensures the engine control unit receives a proportionate voltage or frequency across idle, cruise, and wide-open-throttle conditions.
A mismatched or poorly calibrated output can cause lean or rich fuel trims, erratic idle, and trigger diagnostic codes. When evaluating sensors, look for clear electrical specifications, stable output under temperature variation, and minimal drift over time. These characteristics reduce the need for frequent relearns or long-term ECU compensation.
Mechanical Fitment and Connector Compatibility
Proper physical fit matters as much as electrical compatibility. A sensor that does not seat correctly in the intake tract can allow unmetered air or vibration that skews readings.
Check flange type, mounting hole alignment, and whether the electrical connector mates securely with the Acura TSX harness. Correct orientation within the intake tract ensures representative airflow across the sensing element. Poor fitment can make installation difficult and lead to premature issues.
Contamination Resistance and Build Quality
MAF sensors operate in a harsh intake environment exposed to oil vapors, particulates, and moisture. Materials and protective design influence how well a sensor resists fouling and maintains accuracy.
Sensors with protective coatings, robust housings, and designs that limit deposit buildup will typically last longer and require less cleaning. Consider construction quality, sealing around the sensing element, and how easily the part can be inspected without risking damage during maintenance.
Diagnostic Behavior and Fault Response
How a sensor behaves under fault conditions affects troubleshooting. Predictable failure modes and clear signal degradation patterns make it easier to identify problems using live data and fault codes.
Sensors that produce stable, incremental changes in signal in response to airflow problems simplify diagnostics. Conversely, erratic outputs complicate troubleshooting and may mask the real issue. Consider whether the sensor’s signal characteristics align with common diagnostic methods used on the Acura TSX.
Installation Ease and Serviceability
Ease of install reduces the chance of mounting errors that can affect performance. Features that aid serviceability include accessible connectors, standard mounting hardware, and clear orientation markings.
A sensor that is straightforward to install can be swapped with minimal tools and reduced risk of intake leaks. Also consider how easy it is to clean or inspect the sensing element without compromising calibration or damaging fragile components.
Long-Term Stability and Warranty Support
Long-term stability covers how well a sensor maintains calibration and mechanical integrity over time. Sensors that hold calibration reduce the need for frequent diagnostics and ECU compensation adjustments.
Warranty and manufacturer support matter because they indicate expected lifespan and confidence in the product. Look for documented stability claims, reasonable warranty coverage, and availability of replacement support if the sensor shows premature degradation.
FAQ
What symptoms indicate a failing Acura TSX mass air flow sensor?
Common symptoms include rough or unstable idle, hesitation or reduced power under acceleration, and occasional stalling. You may also see increased fuel consumption or a check engine light related to airflow measurement. These signs often appear gradually as the sensing element becomes contaminated.
Can cleaning the mass airflow sensor resolve performance issues?
Cleaning the sensing element can restore proper readings when contamination is light and the element is not physically damaged. Use a dedicated mass airflow sensor cleaner and follow safe techniques to avoid damaging fragile parts. If symptoms persist after cleaning, replacement is usually the next step.
How do I test a MAF sensor on an Acura TSX?
Testing typically involves monitoring the sensor output with live data while the engine runs, checking for stable voltage or frequency changes with varying throttle. You can also check for diagnostic codes related to airflow. If readings are erratic or do not change with airflow, the sensor may be faulty.
Will a bad mass air flow sensor trigger a P0100 code?
Yes, a P0100-style code often indicates a problem in the mass airflow sensor circuit or signal. That code points to inconsistent or out-of-range airflow readings, but it does not pinpoint the root cause. Further diagnostics are usually needed to confirm whether the sensor, wiring, or intake leaks are responsible.
Is professional installation necessary for a MAF sensor replacement?
Many owners can perform a sensor swap with basic tools if they follow correct orientation and connector procedures. However, professional installation helps ensure proper fitment, connector integrity, and post-installation checks. Professional service can also rule out related issues such as intake leaks or wiring problems.
How We Chose the Best Acura TSX Mass Air Flow Sensor
We focused on attributes that matter for the Acura TSX application. Key evaluation criteria included electrical calibration and sensor accuracy under varying intake temperatures and flow rates, physical fitment and connector compatibility with TSX wiring harnesses, build quality and resistance to contamination, long-term stability and drift characteristics, and ease of installation including mounting orientation. We also considered diagnostic clarity, such as whether a sensor’s signal behavior helps isolate common fault codes related to airflow. Items excluded from consideration were sensors lacking explicit compatibility with the Acura TSX intake flange or those with unclear electrical specs. Our filters emphasized sensors that match the TSX mechanical and electrical interfaces, offer consistent voltage or frequency output across operating ranges, and are designed to resist common contaminants that cause early failure.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a mass air flow sensor for an Acura TSX, prioritize electrical accuracy and precise fitment with the intake flange and connector. Those factors have the biggest impact on drivability, fuel trims, and diagnostic clarity. Also weigh contamination resistance, ease of installation, and long-term stability to limit future maintenance and diagnostic time.Balancing these tradeoffs will help you pick a sensor that restores reliable idle and consistent throttle response while minimizing repeat work.
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