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If you drive an Acura TSX, the throttle body plays a major role in engine response and idle stability. A properly matched unit helps the engine breathe smoothly, reduces hesitation, and minimizes erratic idle behavior that can affect daily driving and diagnostics. This guide focuses on the top shortlisted throttle bodies chosen for their fitment accuracy, airflow characteristics, and reliability under typical driving conditions. Read on to see the factors we evaluated and how each choice addresses common throttle-related concerns.
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 | ADIGARAUTO Throttle Body Compatible with 2.4L Honda/Acura Engines |  |
| Most Popular A crowd favorite that many people choose with confidence | X4XZ S20236 Electronic Throttle Body (replacement) |  |
| Best Quality Built to a higher standard if you want something more solid | Beck/Arnley Throttle Body 154-0165 |  |
| Best Budget The cheapest option that still gets the job done reliably | AUQDD TB1301 Electronic Throttle Body Assembly for Acura TSX 2.4L |  |
| Most Sold A high-volume bestseller chosen again and again | Cardone Remanufactured Electronic Throttle Body (67-2019) |  |
| Best Value for Money The sweet spot between price and what you get | Hitachi ETB0004 Electronic Throttle Body (includes gasket/O-ring) |  |
| Best Overall The best all-around choice for most situations | Hitachi ETB0005 Electronic Throttle Body |  |
1. ADIGARAUTO Throttle Body Compatible with 2.4L Honda/Acura Engines
| Manufacturer | ADIGARAUTO |
|---|---|
| Manufacturer Part Number | ATHB672005 |
| OEM Part Number | 672005;16400R11A01, 16400R44A01, 16400R44A02, 16400RLGJ01, 16400RX0A01 |
This ADIGARAUTO throttle body is a direct-fit replacement intended to restore throttle response and idle stability on 2.4L vehicles. It installs in place of the factory unit and is typically used when the original throttle body shows faults such as rough idle, limp mode, or throttle hesitation. Notable features include a metal housing and precision-machined components the listing says are tested for durability and fitment to match factory specifications. In practice that means straightforward bolt-on installation for a mechanic or experienced DIYer and a return to predictable throttle behavior without reworking intake components. Buyers can expect improved drivability and a potential small improvement in fuel control when the original unit was failing. Limitations are that electronic relearn or ECU resets are often required after replacement and proper fitment must be confirmed for the specific vehicle application; this unit is offered as a compatible alternative rather than a factory-branded part.
Best for: Reliability-focused owners seeking a budget-friendly replacement to restore dependable throttle control and avoid repeat visits to the shop.
Less Ideal for: Drivers wanting a factory-branded OEM part or those who prefer dealer service and warranty-backed replacements should consider dealer-sourced options.
- Direct-fit replacement engineered to match factory-style mounting and connectors
- Precision-machined components and metal housing for durability in engine conditions
- Designed to restore throttle response and idle stability when the original unit fails
- Suitable for DIY installation with standard procedures and relearn steps
- Requires ECU relearn or battery disconnect procedures after installation
- Not a factory-branded unit so long-term compatibility can vary by vehicle
Verdict A practical, tested aftermarket throttle body aimed at restoring reliable throttle function on compatible 2.4L Acura/Honda engines without factory branding.
2. X4XZ S20236 Electronic Throttle Body (replacement)
| Model | S20236 Electronic Throttle Body |
|---|---|
| Manufacturer Part Number | S20236 |
| OEM Part Number | 67-2000, TB1292, 16400RN0A01, 16400RYEA01 |
This X4XZ S20236 electronic throttle body is a direct replacement unit meant to restore throttle control on affected V6 vehicles, including the Acura TSX V6 3.5L. It installs in place of the factory throttle body and uses a built-in micro control chip to manage throttle position electronically, which can resolve symptoms like rough idle, stalling, and throttle-related check engine lights. Typical use is straightforward: remove the old throttle body, transfer any sensors or gaskets as needed, fit the replacement, and reconnect the electrical connector. The listing highlights aluminum construction and upgraded internal components intended to improve durability under heat and vibration. Practical benefits are improved throttle response after failure and a ready-made replacement without custom tuning. Limitations to keep in mind are variable long-term reliability reported in reviews and the absence of a printed installation manual, which may make installation harder for DIYers who lack vehicle-specific instructions or special tools.
Best for: Buyers prioritizing convenience who want a ready-made replacement to quickly restore throttle function on an Acura TSX and prefer a plug-and-play solution over sourcing OEM parts.
Less Ideal for: Drivers who need guaranteed long-term factory-quality durability or those who prefer dealer-installed factory parts should consider OEM replacement options or professional sourcing instead.
- Built-in micro control chip for smoother electronic throttle response
- Marketed as a direct replacement for factory throttle bodies for compatibility with TSX V6 3.5L
- Aluminum construction and upgraded components for improved durability
- Ships as a complete throttle body assembly ready to install
- No printed installation instructions included which may complicate DIY fitting
- Some customer reports indicate inconsistent reliability across units
Verdict A convenient, ready-to-install replacement for a TSX V6 throttle body that can quickly fix throttle-related drivability issues but has mixed long-term reliability reports.
3. Beck/Arnley Throttle Body 154-0165
| Material | Metal, Plastic |
|---|---|
| Mounting Type | Flange Mount |
| Output Type | electrical signal |
| Upper Temperature Rating | 257 Degrees Fahrenheit |
This Beck/Arnley throttle body is an electronic, flange-mount replacement built to match factory form, fit and function. It includes the motor and required sensors so it plugs into the vehicle wiring and provides the throttle position and control signals the engine computer expects. Typical use is swapping a worn or failing throttle body during routine engine repair or when drivability issues like rough idle, poor throttle response, or limp-home mode occur. The unit is constructed from metal and plastic materials and is rated to withstand elevated under-hood temperatures, which helps long-term durability. Because it is application-specific, installation is straightforward for a competent DIYer or technician and usually requires clearing stored fault codes after fitting. Limits to consider are that this is a factory-style replacement rather than a performance-ported or high-flow aftermarket upgrade, so it will restore stock response but not increase peak airflow for performance builds.
Best for: Performance-oriented buyers who prioritize factory-quality replacements that reliably restore throttle response and drivability on a stock or mildly modified Acura TSX.
Less Ideal for: Drivers building a high-performance or high-flow intake who need an upgraded throttle body for increased airflow and horsepower should consider performance-specific aftermarket options instead.
- Matches factory form, fit and function for a straightforward replacement.
- Includes electronic motor and necessary sensors for plug-and-play installation.
- Constructed to resist typical under-hood temperatures for durable service.
- Application-specific design reduces likelihood of fitment issues during installation.
- Not designed to increase airflow or boost performance for tuned engines.
- Contains plastic components that may be less durable than full-metal performance units.
Verdict A factory-quality, plug-and-play replacement that reliably restores stock throttle function but is not a performance upgrade.
4. AUQDD TB1301 Electronic Throttle Body Assembly for Acura TSX 2.4L
| Compatible engine | L4 2.4L (2354cc) |
|---|---|
| Connector | 6 Pin Male |
| Includes | Throttle actuator, IAC, TPS pre-assembled |
| Inside diameter | 2-1/2 In. (64 mm) |
This AUQDD TB1301 is a budget-focused, direct-replacement electronic throttle body for the 2.4L Acura TSX. It arrives as a complete assembly with the throttle actuator, idle air control and throttle position sensor pre-installed, so it replaces the factory unit without needing to transfer parts. Typical use is a straight swap when a worn or faulty throttle body causes rough idle, hesitation, or check-engine lights. The unit uses an internal micro control chip and upgraded sensors intended to restore smooth throttle response and stable idle after the ECU relearns. Installation requires clearing the ECU adaptation or performing the manual relearn routine described by the manufacturer to stabilize idle. Expect a cost-effective fix compared with dealer parts, but keep in mind this is an aftermarket replacement so fit and long-term durability may not match factory-quality parts and some vehicles need precise relearn for trouble-free operation. For budget repairs on a TSX it offers strong practical value with modest compromise on provenance and potential longevity.
Best for: Budget-conscious Acura TSX owners who want a direct, lower-cost replacement part to get a struggling throttle system back to reliable daily driving without dealer pricing.
Less Ideal for: Owners seeking an exact factory-quality replacement with OEM-backed warranty or long-term endurance testing should consider factory replacement parts or dealer options instead.
- Complete assembly with throttle actuator, IAC and TPS pre-installed for a straightforward swap
- Designed specifically for 2.4L Acura TSX fitment to simplify part selection
- Built-in micro control chip and upgraded sensors to help restore smooth throttle response
- Lower-cost aftermarket alternative to factory replacement parts
- Aftermarket unit may not match factory-quality longevity or factory calibration exactly
- Requires ECU relearn or manual matching after installation to avoid high or unstable idle
Verdict A cost-effective, ready-to-install throttle body for 2.4L Acura TSX owners who need a practical replacement quickly, with the usual aftermarket trade-off in long-term parity with factory parts.
5. Cardone Remanufactured Electronic Throttle Body (67-2019)
| Manufacturer | Cardone |
|---|---|
| Model | Cardone 67-2019 Remanufactured Fuel Injection Throttle Body |
| Exterior | Machined |
This remanufactured Cardone electronic throttle body replaces a failed unit with a factory-quality fit and tested operation for the Acura TSX. It is disassembled, inspected, cleaned and rebuilt so the throttle bore, sensors and moving parts meet return-to-service standards, and each unit is bench-tested for response and airflow at multiple points. In practical use it restores throttle response, idle stability and driveability without the variability of used parts, and can be installed as a direct swap where the original throttle body is required. The major benefit is having the throttle position sensors and control surfaces renewed and verified to match factory characteristics across the operating range. Limitations are that this is a remanufactured part rather than new, so surface wear or cosmetic marks may remain, and compatibility must be confirmed for the specific TSX model year and engine before purchase.
Best for: A risk-averse mainstream buyer who wants a dependable, factory-style replacement that restores stock driveability without gambling on used parts or aftermarket unknowns.
Less Ideal for: Drivers seeking a brand-new performance upgrade or cosmetic-perfect part should consider new aftermarket or OEM replacements instead.
- Factory-quality fit and function aimed at restoring original throttle response
- Bench-tested for throttle response and airflow to ensure consistent operation
- Remanufacturing inspects and renews sensors and moving parts to reduce failure risk
- Being remanufactured, the unit may show cosmetic wear compared with a brand-new part
- Requires confirming exact TSX model year and engine fitment before installation
Verdict A cost-conscious, factory-focused replacement that restores throttle function on the Acura TSX while avoiding the uncertainty of used parts.
6. Hitachi ETB0004 Electronic Throttle Body (includes gasket/O-ring)
| Brand | Hitachi |
|---|---|
| Model | ETB0004 |
| Position | Center |
| OEM Part Number | 16119-JA00A |
This Hitachi electronic throttle body replaces a failing throttle actuator to restore smooth idle, precise throttle response, and proper engine mapping. It is a direct-fit, 100 percent new unit intended for straightforward replacement and is typically used when a vehicle shows rough idle, hesitation, or throttle-related fault codes. Notable features include precision throttle position sensor circuitry and application-specific gear ratios that aim to match factory drivability and reduce wear on the motor. In real-world use the part installs like a factory replacement and often requires an idle relearn or simple programming step after installation to fully sync with the engine control module. Practical benefits are OEM-level fit and durability from a Tier 1 supplier and improved drivability compared with worn or malfunctioning units. Limitations are that installation can require a relearn procedure or scanner on some vehicles and the package may not include every paper gasket needed, so plan to have replacement gaskets available during installation.
Best for: A practical optimizer who wants a dependable, factory-quality replacement that restores original drivability without paying dealer pricing and is comfortable arranging a simple relearn or minor installation steps.
Less Ideal for: Drivers who need a plug-and-play part with every installation consumable included or who cannot perform or access a relearn/programming step should consider alternatives or professional installation.
- Factory-quality design from a Tier 1 supplier for reliable, OEM-like performance
- Precision throttle position circuitry improves idle stability and throttle response
- Sold as a new unit, not remanufactured, reducing early-failure risk
- Application-specific gear ratios and materials for durable operation
- May require an idle relearn or diagnostic scanner to program correctly after installation
- Does not always include every thin paper gasket needed for a full install
Verdict A cost-effective, factory-quality throttle body replacement that restores OEM drivability if you can handle a brief relearn or programming step.
7. Hitachi ETB0005 Electronic Throttle Body
| Brand | Hitachi |
|---|---|
| Material | Aluminum, Plastic |
| Manufacturer | Astemo |
| Model | ETB0005 |
| OEM Part Number | 16119-JK20A, 16119-JK20C |
The Hitachi ETB0005 is a direct-fit electronic throttle body built to replace a factory unit and restore proper throttle response on compatible Acura TSX models. It uses a sealed electronics assembly and precision throttle position sensor circuitry to maintain accurate air flow metering and smooth idle behavior. Installation is typically plug-and-play for technicians familiar with throttle-body swaps, and the motor and internal gearing are engineered for quick, repeatable response that supports fuel efficiency and low emissions. In practice this means the car will regain factory-like drivability after installation and any required ECU synchronization. Most users report OEM-level fit and performance, though some vehicles may need dealer-level programming or ECU updates to complete calibration. A small number of buyers have reported cosmetic wear or older-looking units on arrival, so inspect the part on delivery and be prepared to work with a shop if synchronization is needed.
Best for: A balanced all-round buyer who wants a factory-quality replacement that restores original drivability and emissions performance without chasing performance upgrades.
Less Ideal for: Not a good choice for owners seeking performance modifications or custom tuning; those buyers should consider aftermarket performance throttle bodies or a full intake upgrade.
- Factory-quality design and components for reliable throttle control
- Sealed electronics and precision TPS circuitry reduce risk of contamination and inaccurate readings
- Direct-fit vehicle-specific mount simplifies installation for technicians
- Fast motor and accurate internal gearing provide responsive throttle feel
- May require ECU synchronization or dealer programming after installation
- Some units have arrived with cosmetic signs of prior use for a minority of buyers
Verdict A reliable, factory-equivalent throttle body that brings back stock drivability for Acura TSX owners who want a balanced, OEM-style replacement.
Choosing the Right Acura TSX Throttle Body: Key Factors to Consider
Fitment And Bolt Pattern
Accurate fitment is essential because the throttle body must seal correctly to the intake manifold and align with the throttle cable or electronic actuator. A mismatched bolt pattern or incorrect flange thickness can lead to intake leaks, check engine lights, and poor drivability.
Confirming exact fitment reduces the need for adapters or modifications that may introduce failure points. Proper alignment ensures the throttle plate operates smoothly and that sensors mount in the correct orientation for reliable readings.
Airflow Capacity And Throttle Plate Size
Airflow capacity determines how much air the engine can draw at a given throttle opening, which affects throttle response and power delivery. A larger throttle plate may improve top-end airflow but can reduce throttle sensitivity at low openings if not matched to the engine's needs.
Consider throttle plate diameter and how the body's internal shaping promotes smooth flow. For street-driven TSX models, a balance between responsive low-end throttle and adequate high-rpm flow usually yields the best everyday experience.
Sensor Compatibility And Electronics
Many throttle bodies integrate or interface with throttle position sensors and idle control systems. Ensuring the electronic connectors, sensor signal ranges, and mounting locations match the TSX originals prevents calibration issues and reduces the likelihood of error codes.
If the unit is drive-by-wire compatible, check that the actuator behaves predictably and that the vehicle's ECU can recognize the sensor outputs without extensive reprogramming.
Material Quality And Carbon Resistance
Throttle bodies exposed to intake airflow are prone to carbon deposits and corrosion over time. Materials such as anodized aluminum or treated alloys resist pitting and make surface cleaning easier. High-quality shaft bushings and seals reduce play that causes inconsistent throttle plate positioning.
A design that limits crevices where carbon accumulates simplifies maintenance and helps preserve consistent idle and throttle feel over many miles.
Serviceability And Maintenance
Some throttle bodies are easier to access and clean than others, and serviceability matters for long-term ownership. Consider whether the sensor can be replaced separately, if the throttle plate can be accessed without disassembling the entire intake, and how commonly available the gasket or mounting hardware is.
Units that accommodate routine cleaning and straightforward repairs reduce downtime and cost compared with parts that require complete replacement for minor issues.
Idle Control And Driveability
How a throttle body manages idle air can directly affect idle stability and the likelihood of symptoms like surging or stalling. The shape of the throttle bore, presence of bypass channels, and compatibility with the vehicle's idle control system all influence low-speed drivability.
Prioritize designs that promote smooth idle adjustments and predictable throttle response during steady-state cruising and stop-and-go traffic to avoid annoying or potentially unsafe behavior.
FAQ
What are common throttle body symptoms on an Acura TSX?
Common signs often include rough or fluctuating idle, reduced throttle responsiveness, and occasional stalling at low speeds. You may also see an illuminated engine light when the vehicle detects inconsistent sensor readings or airflow issues.
Can throttle body cleaning fix performance issues?
Cleaning can often help if carbon buildup is causing the throttle plate to stick or sensors to read inaccurately. It usually improves idle stability and throttle response, but persistent issues may indicate worn components or sensor faults that require replacement.
How do I know if I need a throttle body replacement or repair?
If cleaning and sensor checks do not resolve idle instability or throttle position errors, or if there is excessive shaft play and visible wear, replacement is often the more reliable option. Diagnostic codes and a mechanic inspection can clarify whether repairable parts are available.
Is installing a throttle body difficult for a home mechanic?
Installation difficulty depends on experience and the TSX’s engine layout. Basic mechanical skills and common hand tools are sufficient for many units, but attention to correct gasket sealing, connector mating, and torque specs is important. Some jobs may be easier with a repair manual or torque wrench.
Will a different throttle body change fuel economy?
A differently sized or shaped throttle body can affect engine efficiency, but changes are usually modest for street use. The primary impact is on throttle response and drivability rather than large jumps in fuel economy unless the engine tuning is altered as well.
Can I rebuild my existing throttle body instead of replacing it?
Rebuild kits that replace seals, bushings, and gaskets can restore function if the housing and plate are in good condition. Rebuilding is a cost-effective option when wear is limited to serviceable components and the bore remains undamaged.
How We Chose the Best Acura TSX Throttle Body
We evaluated throttle bodies for the Acura TSX using criteria that reflect real-world needs for this vehicle. Primary filters included exact fitment to the TSX intake manifold and throttle linkage, measured airflow rates and throttle plate sizing relevant to the engine, and sensor compatibility for the original throttle position sensor and connectors. Durability and build quality were assessed by looking at materials, shaft and bearing design, and resistance to carbon buildup. Ease of installation and serviceability were considered, including gasket fit, bolt pattern alignment, and whether common maintenance tasks like cleaning or replacing the sensor are straightforward. Reliability in varied driving conditions and consistency of idle behavior were also key. We excluded units that lacked clear fitment data for the TSX, kits intended for racing-only use without street-legal considerations, or parts that required extensive modification. The final list balances correct fit, airflow performance, durability, and practical serviceability for everyday drivers.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a throttle body for an Acura TSX, prioritize correct fitment, sensor compatibility, and airflow characteristics that suit everyday driving. Consider material quality and ease of maintenance to minimize future issues.Balance the need for improved throttle response against potential tradeoffs in low-speed control. Focusing on fit, durability, and serviceability will give the most reliable outcome for both performance and long-term ownership.
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