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If your Acura TLX is showing hesitation, rough idle, or laggy throttle response, choosing the right throttle body can make a noticeable difference in drivability. The right unit restores consistent airflow and electronic responsiveness so you get smoother acceleration and more reliable idle behavior. This guide covers seven shortlisted throttle bodies chosen for their compatibility and airflow characteristics. We evaluated each option for fitment, airflow performance, and ease of installation to help you find a suitable replacement for your TLX. Read on to see which models made the cut and why they might suit your needs.
Looking for other parts? See all Acura TLX parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | ADIGARAUTO Throttle Body, direct-fit replacement |  |
| Most Popular A crowd favorite that many people choose with confidence | X4XZ S20236 Electronic Throttle Body (replacement for 16400RN0A01) |  |
| Best Quality Built to a higher standard if you want something more solid | A-Premium Electronic Throttle Body with Throttle Position Sensor |  |
| Best Budget The cheapest option that still gets the job done reliably | Radvik Electronic Throttle Body Assembly (replaces 16400RYEA01 / 16400RN0A01) |  |
| Most Sold A high-volume bestseller chosen again and again | AISIN Electronic Throttle Body Assembly with TPS Sensor |  |
| Best Value for Money The sweet spot between price and what you get | ROADFAR Electric Throttle Body for 2015–2020 Acura TLX |  |
| Best Overall The best all-around choice for most situations | A-Premium Electronic Throttle Body (replacement for 16400RAAA62/61) |  |
1. ADIGARAUTO Throttle Body, direct-fit replacement
| Manufacturer | ADIGARAUTO |
|---|---|
| Manufacturer Part Number | ATHB672005 |
| OEM Part Number | 672005;16400R11A01, 16400R44A01, 16400R44A02, 16400RLGJ01, 16400RX0A01 |
| Compatible Engine | 2.4L engine |
| Date First Available | November 8, 2020 |
This ADIGARAUTO throttle body is a direct-fit replacement intended to restore correct air intake control and throttle response on compatible 2.4L Honda-based engines. It is typically used to replace a failing or dirty throttle body that is causing rough idle, reduced power, or throttle-related fault codes. The unit is built from metal components with precision-machined surfaces and is advertised as meeting factory-quality fitment so installation is straightforward for a mechanic or competent DIYer. In practice you can expect improved throttle smoothness and the chance to clear related check-engine issues after installation and the required relearn/reset procedures. Limitations are that fitment must be verified carefully for the TLX model and specific engine/control variants, and some vehicles may still require a throttle relearn or ECU reset after swap. This part is a replacement component rather than an upgrade, so it restores factory function rather than increasing performance above stock levels.
Best for: A reliability-focused buyer who prioritizes restoring factory drivability and avoiding repeat visits to the shop; ideal for owners who want a straightforward replacement that gets the car back to stock operation.
Less Ideal for: Not a good choice for owners looking for an aftermarket performance upgrade or custom tuning solution.
- Direct-fit design for easy installation without modifications
- Precision-machined components aimed at consistent throttle operation
- Metal housing and construction for durability in the engine bay
- Designed to restore proper airflow and throttle response
- Compatibility must be double-checked for specific TLX engine/control variants before purchase
- Does not increase performance beyond factory specifications
Verdict A practical, factory-quality replacement to restore throttle function on compatible 2.4L Acura TLX engines when reliability and correct drivability are the priority.
2. X4XZ S20236 Electronic Throttle Body (replacement for 16400RN0A01)
| Manufacturer Part Number | S20236 |
|---|---|
| OEM Part Number | 67-2000, TB1292, 16400RN0A01, 16400RYEA01 |
| Manufacturer | X4XZ |
| Item model number | S20236 |
This X4XZ S20236 electronic throttle body replaces factory units and is intended to restore proper throttle response, eliminate rough idling, and prevent related check-engine lights. It installs in place of the original throttle body and is used when a failing unit causes limp performance or hesitation. The unit includes a built-in micro control chip to manage throttle positioning and claims upgraded internal components and coatings for improved durability. For a convenience-focused buyer the key benefits are straightforward replacement fit and the promise of plug-and-play operation without aftermarket tuning. Practical limits are that fitment must match the vehicle application exactly and installation may require basic mechanical skills or a shop for throttle relearn procedures; the listing does not include a printed manual. Some buyers report mixed reliability, so expect occasional variation in long-term durability compared with factory-quality parts. The seller offers one year of product service and customer support for installation questions.
Best for: Buyers who prioritize convenience and fast restoration of drivability and expect a near plug-and-play replacement with seller support rather than sourcing OEM parts.
Less Ideal for: Shoppers seeking guaranteed factory-quality longevity or a throttle body for vehicles outside the listed Acura/Honda V6 applications should consider a factory-quality or dealer-sourced unit instead.
- Direct replacement designed to match OEM mounting and connectors for listed V6 applications
- Integrated micro control chip for smoother throttle response and reduced stalling/rough idle
- Aluminum construction and upgraded internal components aimed at improved durability
- Comes as a complete throttle body unit so no additional parts are required for a standard swap
- No printed installation manual included so beginners may need professional help for relearn procedures
- Reported variability in long-term reliability across user reports
- Fitment is limited to specific Acura and Honda V6 models and must be verified before purchase
Verdict A convenient, ready-to-install replacement for compatible Acura/Honda V6 models that restores throttle function quickly but may not match factory longevity for all users.
3. A-Premium Electronic Throttle Body with Throttle Position Sensor
| Manufacturer Part Number | APTHB283 |
|---|---|
| Terminal Quantity | 6 |
| Material | Aluminum |
| Throttle Position Sensor | Included |
| Throttle Body Type | Electronic |
This A-Premium electronic throttle body replaces the factory unit on compatible Acura and Honda V6 models and includes a built-in throttle position sensor for direct electrical compatibility. It is designed for surface-mount installation and uses a six-pin connector that matches the original harness, so it is typically bolted in place where the intake meets the throttle assembly and plugged into the vehicle wiring. The aluminum housing and push-pull output type provide a durable, responsive assembly that restores throttle response and idle control after a worn or failing unit is removed. For a performance-oriented buyer focused on quality, the inclusion of the throttle position sensor and a one-year unlimited-mileage guarantee adds confidence for spirited driving and highway use. Limitations include the need for correct vehicle-specific fitment and professional calibration or reset procedures in some cases, and it does not include an idle air control motor if a vehicle requires one.
Best for: Performance-oriented buyers who prioritize restoring crisp throttle response and reliable electronic control after a failing throttle body, and who prefer a high-quality replacement with factory-style functionality.
Less Ideal for: Casual DIYers seeking a universal part or an all-in-one kit that includes idle control components should look elsewhere; buyers who need cross-vehicle compatibility are better served by other options.
- Integrated throttle position sensor simplifies wiring and restores electronic feedback to the ECU.
- Aluminum housing offers corrosion resistance and a factory-style appearance.
- Six-terminal connector matches common factory harnesses for straightforward plug-in connectivity.
- Push-pull output design provides direct control compatible with electronic throttle systems.
- Does not include an idle air control motor, so additional parts may be needed for some diagnoses.
- Fitment is vehicle-specific and requires confirming compatibility before installation.
Verdict A solid factory-style electronic throttle body replacement for restoring performance and throttle control on compatible Acura TLX V6 applications.
4. Radvik Electronic Throttle Body Assembly (replaces 16400RYEA01 / 16400RN0A01)
| Manufacturer | Radvik |
|---|---|
| Position | Front |
| OEM Part Number | 16400RN0A01, 16400RYEA01, S20236, TB1292, 672000 |
This Radvik throttle body is a budget-focused, factory-quality replacement designed to restore proper throttle response, idle stability, and engine performance on compatible V6 Hondas and Acuras. It arrives as a complete assembly intended for direct swap-in use and is typically installed where the original throttle body has failed, causing rough idle, hesitation, or a throttle control warning. The unit is made from reinforced aluminum alloy for corrosion and heat resistance and is produced to match several factory part numbers so fitment and connector alignment are straightforward for a direct replacement. Buyers will appreciate the straightforward installation and that it addresses common symptoms like stalling and sluggish acceleration without needing additional parts. Limitations include occasional reports of inconsistent seller packaging and a small number of listings where used items were received; bench testing or visual inspection before installation is prudent. The product is backed by the seller's stated replacement support, which helps reduce risk for the budget buyer.
Best for: Budget-conscious owners seeking a reliable, factory-quality replacement throttle body to restore drivability without paying for a dealer part or a high-end aftermarket unit.
Less Ideal for: Owners who prioritize OEM dealer support, original factory packaging, or who need throttle bodies reprogrammed and bench-calibrated by the dealer should consider dealer-sourced parts or a professional reman unit instead.
- Factory-spec replacement fit for the listed OEM part numbers to simplify installation
- Comes as a complete assembly so no additional parts are required for a standard swap
- Aluminum alloy construction resists heat and corrosion for longer service life
- Addresses common throttle-body symptoms like poor acceleration, unstable idle, and stalling
- Some customers reported receiving used or poorly packaged units from sellers
- Notifiable compatibility: must match the vehicle's exact part number and engine application before purchase
Verdict A cost-effective, factory-spec replacement throttle body that restores throttle function for budget-focused buyers when the correct part number match is confirmed.
5. AISIN Electronic Throttle Body Assembly with TPS Sensor
| Material | Metal, Plastic |
|---|---|
| Mounting Type | Flange Mount |
| Output Type | electrical signal |
| Specific Uses For Product | Engine |
This AISIN electronic throttle body assembly replaces a failing throttle body with a ready-to-install unit that includes a premounted throttle position sensor for straightforward plug-and-play connection. It is typically used to restore throttle response and eliminate limp-home modes caused by worn or sticking components. The part is built from new components with a precision cast aluminum housing and corrosion-resistant steel internals to maintain proper airflow and long-term smooth operation. Because it arrives as a full assembly with the correct connector and gasket, most installations are quick and avoid sensor transfer or calibration headaches. The main limitation is that it is a direct replacement part rather than a performance upgrade, so it will not increase power or change throttle mapping. Buyers should also confirm fitment and any vehicle-specific relearn procedures for the Acura TLX before installation.
Best for: Risk-averse buyers who prioritize reliable, factory-quality replacements for routine repairs on their Acura TLX and want a straightforward, low-risk installation.
Less Ideal for: Buyers seeking performance upgrades, custom throttle tuning, or features beyond restoring factory functionality should look at aftermarket tuning or performance-oriented throttle solutions.
- Complete assembly with premounted throttle position sensor for simpler installation
- Precision cast aluminum housing preserves correct airflow characteristics
- All-new components rather than remanufactured parts for predictable longevity
- Corrosion-resistant finishes on internal steel parts for smoother long-term operation
- Designed as a factory-style replacement and does not improve throttle performance or tuning
- May require vehicle-specific relearn or calibration after installation
Verdict A reliable, OEM-quality replacement throttle body for Acura TLX owners who want a quick, low-risk repair rather than a performance upgrade.
6. ROADFAR Electric Throttle Body for 2015–2020 Acura TLX
| Compatible vehicle | 2015–2020 Acura TLX |
|---|---|
| Manufacturer part references | 67-2010, 672010, 164005A2A02 |
| Item model number | 170185-5231-1503175342 |
This ROADFAR electric throttle body is a bolt-in replacement intended to restore proper throttle response and idle control on 2015–2020 Acura TLX vehicles. It replaces the factory throttle assembly and the unit uses an electronic actuator and integrated sensors so the vehicle ECU can regulate airflow and fuel delivery as before. Typical use is a like-for-like replacement when the original throttle body shows symptoms such as rough idle, poor acceleration, or a check engine light for throttle control. The practical benefit is quick restoration of driveability without reprogramming when fitment is correct, and customers report straightforward installation and compatibility. The product lists several OEM cross-references to match factory part numbers, which helps ensure the right fit. Limitations are that it is an aftermarket part rather than a factory-branded component and long-term durability versus a manufacturer unit may vary, so careful match of year and model is important before installation.
Best for: Practical optimizers who want a cost-effective, direct replacement to get a 2015–2020 Acura TLX back to normal drivability without unnecessary upgrades.
Less Ideal for: Buyers seeking a factory-branded OEM throttle assembly for guaranteed long-term parity or those wanting performance-enhancing throttle upgrades.
- Made to replace the factory throttle body for 2015–2020 Acura TLX, simplifying fitment
- Integrated electronic actuator and sensors restore factory throttle control without ECU reflash
- Reportedly easy installation when the correct part number is selected
- Includes OEM cross-reference numbers to help confirm compatibility
- Aftermarket unit, so long-term durability may differ from factory-quality parts
- Limited to specific model years and will not fit other vehicles
Verdict A budget-friendly, direct-fit throttle body for 2015–2020 Acura TLX owners who want to restore proper throttle function without overspending.
7. A-Premium Electronic Throttle Body (replacement for 16400RAAA62/61)
| Compatible engines | 2.4L L4 (automatic transmission only) |
|---|---|
| Connector type | Pin, 3 terminals |
| Housing material | Aluminum |
| Includes | Throttle position sensor, gasket |
This A-Premium electronic throttle body is a direct-replacement throttle assembly intended to restore proper throttle control and idle behavior on compatible 2.4L vehicles. It installs in place of the factory unit and includes a throttle position sensor and a gasket so you can complete the swap without sourcing extra parts. In use it performs the basic job of controlling airflow to the intake and reporting throttle position to the engine computer, which reviewers say often fixes high or erratic idle and related check-engine faults after performing a standard idle relearn. The housing is aluminum and the unit uses a three-pin electrical connector. Practical benefits include receiving a ready-to-install unit that matches factory mounting and reduces downtime compared with repairing a corroded or failing OEM part. Limitations to note are mixed reports about the TPS accuracy from some users and an expectation that you may need to follow relearn/reset procedures after installation; long-term durability is less documented than OEM parts.
Best for: Balanced buyers who want a cost-effective, ready-to-install throttle body to get a 2.4L vehicle back to reliable running without sourcing multiple parts or extensive fabrication.
Less Ideal for: Drivers seeking guaranteed OEM longevity or those unwilling to perform ECU relearn/reset procedures should consider a factory-quality replacement or dealer service instead.
- Direct-fit replacement designed to match factory mounting for 2.4L Honda applications
- Includes throttle position sensor and gasket for a complete swap
- Aluminum housing resists corrosion better than some cheaper materials
- Frequently resolves erratic or high idle and related fault codes once installed and relearned
- Some users report inconsistent throttle position sensor performance that can trigger fault codes
- Limited long-term reliability data compared with factory parts
Verdict A practical, complete replacement that fixes common idle and throttle issues for 2.4L cars but comes with mixed TPS reports and less long-term evidence than factory parts.
Choosing the Right Acura TLX Throttle Body: Key Factors to Consider
Fitment and Vehicle Compatibility
Correct fitment is the foundation of a successful throttle body swap. Ensuring the unit is specified for the Acura TLX prevents issues such as poor sealing, misaligned mounting holes, or incompatible electrical connectors.
A direct-fit component reduces installation time and the risk of vacuum leaks or wiring adapter mistakes. Confirming compatibility with the TLX model year and engine variant helps avoid surprises during installation and preserves factory engine management behavior.
Airflow Design and Throttle Bore Size
Airflow characteristics determine how quickly and smoothly the engine receives air as you open the throttle. Bore size and the internal throat geometry affect volumetric flow and can influence throttle response and power delivery at different RPM ranges.
For street-driven TLX vehicles, look for designs that offer balanced flow for low-end responsiveness and steady airflow at cruising speeds. Aggressive or oversized bores can upset idle quality or require calibration, so match airflow capability to your typical driving conditions.
Electronic Actuator and Sensor Compatibility
Modern throttle bodies rely on electronic actuators and position sensors to communicate with the engine control unit. Matching sensor outputs and connector types to the TLX ensures accurate throttle position feedback and prevents error codes.
Reliable actuator responsiveness matters for smooth pedal feel and predictable throttle modulation. Consider whether the part preserves original electrical interfaces and whether it supports standard ECU relearn procedures to restore proper engine management.
Build Quality and Materials
Durable construction helps the throttle body withstand heat cycles, vibration, and exposure to intake contaminants. Materials like corrosion-resistant aluminum and high-quality seals extend service life and reduce the chance of vacuum or air leaks.
Robust linkage, secure mounting flanges, and quality finishes reduce maintenance needs. Parts designed with minimal internal crevices also simplify routine cleaning and lower the likelihood of carbon buildup affecting throttle operation.
Ease of Installation and Maintenance
A throttle body that installs with minimal modification saves time and reduces installation errors. Look for units that retain factory mounting points and use original-style electrical connectors to avoid adapters or splicing.
Maintenance considerations include how accessible the throttle plate and sensors are for cleaning and whether common service procedures like ECU relearn are straightforward. Parts that are easy to remove and service help keep long-term ownership simple.
Idle Behavior and Driveability Impact
How a throttle body affects idle and low-speed driveability is critical for everyday use. Design choices that alter airflow or sensor calibration can change idle stability, throttle lag, or surge tendencies.
Choose a unit that preserves or improves steady idle characteristics and predictable throttle response. Consider the tradeoff between sharper throttle behavior and potential increases in idle sensitivity when selecting a part for regular street driving.
FAQ
What are common symptoms of a failing throttle body on an Acura TLX?
Common symptoms often include rough or fluctuating idle, hesitation during acceleration, and a noticeable drop in throttle responsiveness. You might also see engine warning lights related to throttle position or intake control. These signs usually point to carbon buildup, sensor drift, or actuator wear rather than other unrelated systems.
Can I clean the throttle body myself or should I replace it?
Cleaning can often resolve issues caused by carbon deposits and restore smoother operation if the actuator and sensors are functioning. Replacement is typically needed when there is mechanical damage, severe wear, or electronic failure. If cleaning, follow safe procedures and ensure the throttle body and sensors are fully dry before reinstallation.
How does throttle body fitment affect installation time?
Direct-fit units specified for the Acura TLX usually install in a single session using factory mounting points and connectors, which keeps labor time low. Non-direct-fit parts can require adapters, wiring changes, or modification of intake plumbing, which increases complexity and installation time. Confirming fitment first helps avoid delays.
Will replacing the throttle body fix idle surge issues?
Replacing a faulty throttle body often alleviates idle surge when the cause is a malfunctioning plate, actuator, or sensor. However, idle surge can also stem from vacuum leaks, intake leaks, or engine management faults. Diagnosing multiple potential causes helps ensure the correct fix.
Do I need to perform an ECU relearn after installing a new throttle body?
Most installations benefit from an ECU relearn or throttle adaptation to ensure the engine control unit correctly interprets the new throttle position feedback. The specific procedure depends on the vehicle and may be performed with dealer-level tools, aftermarket scanners, or by following documented relearn steps for the TLX.
How We Chose the Best Acura TLX Throttle Body
We focused exclusively on components designed to fit the Acura TLX platform, prioritizing direct-fit options and those that minimize calibration or adapter needs. Key filters included exact vehicle fitment, throttle bore diameter and throat design, actuator responsiveness and electronic compatibility, and materials and finish for durability under engine bay conditions. We also considered ease of installation, including whether the unit preserves original electrical connectors and mounting points, plus how straightforward routine cleaning or maintenance would be. Units that required extensive modification, custom tuning beyond standard ECU relearn procedures, or lacked clear fitment documentation were excluded. Our final shortlist emphasizes parts that balance reliable airflow characteristics with straightforward integration into the TLX electrical and intake systems.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize correct fitment, sensor compatibility, and airflow characteristics when selecting a throttle body for an Acura TLX. Those factors most directly affect idle stability, throttle responsiveness, and ease of installation. Balance build quality and ease of maintenance against the airflow needs of your driving style. Addressing common failure modes such as carbon buildup or sensor drift will help you restore consistent performance and avoid repeated service.
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