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If your Acura TSX is showing uneven idle, reduced responsiveness, or inconsistent fuel delivery, choosing the right fuel injector matters. The wrong unit can cause rough running, poor fuel atomization, or premature wear, while a well-chosen injector helps restore smooth idle and predictable throttle response. This guide shortlists the top picks for Acura TSX fuel injector replacements and evaluates each option across key performance and reliability criteria. Below you will find the reasons these units made the list and what to look for when selecting the right injector for your vehicle.
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 | TAUTOY FJ983 Fuel Injector Set (4) for Acura TSX 2.4L |  |
| Most Popular A crowd favorite that many people choose with confidence | EMTMOUN Set of 4 Fuel Injectors for 2.4L Honda/Acura (fits Acura TSX) |  |
| Best Quality Built to a higher standard if you want something more solid | A-Premium Fuel Injectors Set of 6 (compatible with Acura TSX 2010-2014) |  |
| Best Budget The cheapest option that still gets the job done reliably | Germban Fuel Injectors (16450-R70-A01) — 6-Pack Direct Replacement |  |
| Most Sold A high-volume bestseller chosen again and again | TSSLIIN Fuel Injector (fit for Acura TSX/ILX 2.4L) |  |
| Best Value for Money The sweet spot between price and what you get | STZJAYE Fuel Injectors Set of 4 (compatible with Acura TSX 2009-2014) |  |
| Best Overall The best all-around choice for most situations | NECATUO Set of 6 Fuel Injectors (Replaces FJ982 / 16450R70A01) |  |
1. TAUTOY FJ983 Fuel Injector Set (4) for Acura TSX 2.4L
| Number of Ports | 8 |
|---|---|
| Inlet Connection Type | Push-in |
| Outlet Connection Type | Push-in |
| Manufacturer | TAUTOY |
These TAUTOY FJ983 injectors are sold as a four-pack replacement for the Acura TSX 2.4L and are intended to restore proper fuel delivery and combustion. In typical use you swap the set into the TSX rail to replace worn or leaking originals; TAUTOY states each unit is flow-tested and function-checked during production. Notable features include factory-style push-in electrical connections and an advertised focus on atomization for cleaner combustion. For a reliability-minded owner the practical benefits are straightforward: the set aims to eliminate rough idle, misfires, and poor fuel economy caused by aging injectors while matching OEM fitment for direct installation. Limitations to consider are that long-term durability depends on vehicle maintenance and fuel quality, and these are aftermarket parts rather than factory-sourced units so some buyers may prefer dealer-brand replacements for warranty consistency. Installation may require basic mechanical skills or a shop visit if you want injector seals and calibration double-checked.
Best for: Reliability-focused buyers who prioritize restoring consistent engine performance and fuel delivery on an Acura TSX and prefer tested, ready-to-install replacements over sourcing individual injectors.
Less Ideal for: Buyers seeking factory-sourced dealer parts with extended manufacturer warranty protection or those unwilling to accept aftermarket alternatives should consider dealer options instead.
- Sold as a complete four-injector set sized for direct replacement in the TSX fuel rail
- Factory-style push-in connections simplify installation with OEM harnesses
- Manufacturer reports 100% function and leakage testing for consistent flow between units
- Aftermarket part so long-term warranty and parts history differ from dealer replacements
- Durability still depends on vehicle conditions like contaminated fuel which can shorten service life
Verdict A cost-effective, flow-tested four-pack aimed at reliability-focused TSX owners who want to restore fuel delivery without major modification.
2. EMTMOUN Set of 4 Fuel Injectors for 2.4L Honda/Acura (fits Acura TSX)
| Compatible engine | 2.4L L4 |
|---|---|
| Replacement OEM numbers | FJ1046, 16450-R40-Y01, 800-2082N, MP56160 |
| Tested for | flow, leak, electrical response |
This EMTMOUN set supplies four replacement fuel injectors intended to match factory-style fitment for 2.4L 4-cylinder engines such as the Acura TSX. The kit is used to replace worn or clogged injectors that cause rough idle, hesitation, misfires, or loss of power. Each injector is flow-tested and leak-tested to help ensure consistent spray pattern and electrical response, which supports smoother throttle response and more even combustion after installation. For a convenience-minded owner, the parts arrive ready to install and are intended to drop in without modification when the vehicle, engine size, and OEM numbers match. Practical benefits include restoring drivability and avoiding a shop visit if you can do basic engine work yourself. Limitations to keep in mind are variable real-world results reported by some buyers, including occasional early failures and mixed effects on fuel economy, so budget-conscious buyers should consider the uncertainty compared with a factory-quality replacement.
Best for: Drivers prioritizing convenience and a quick, do-it-yourself repair who want a ready-to-install injector kit to restore smooth running without a trip to the shop.
Less Ideal for: Buyers who want guaranteed factory-quality longevity or who cannot tolerate the risk of needing another replacement should consider dealer or higher-end branded injectors instead.
- Sold as a complete set of four for full-bank replacement on a 4-cylinder engine
- Flow and leak tested to promote consistent spray pattern and electrical response
- Designed to match factory-style fitment for direct replacement when OEM numbers match
- Some buyers report inconsistent longevity and a few early failures
- Mixed reports on fuel economy after installation
Verdict A convenient, drop-in injector kit for the Acura TSX 2.4L that can restore drivability for DIY owners, but it carries some risk of variable long-term reliability.
3. A-Premium Fuel Injectors Set of 6 (compatible with Acura TSX 2010-2014)
| Compatible Vehicles | Acura TSX 2010-2014 V6 3.5L |
|---|---|
| Injector Design | Metal and composite plastic |
| O-Rings | Included, preinstalled |
| Terminal Type | Blade, male |
These A-Premium injectors replace the factory units to restore proper fuel atomization and injector flow for the Acura TSX 2010–2014 V6 3.5L. They are sold as a set of six and use a metal and composite plastic construction with preinstalled O-rings and blade-style electrical terminals for a direct plug-in fit. In use they aim to deliver a finer fuel mist for improved combustion, which can help smooth idle, recover lost throttle response, and potentially improve fuel economy compared with worn injectors. Installation is the typical dealer or DIY procedure of removing the intake components, unplugging the factory injectors, and swapping in the replacements using the included seals. Limitations to keep in mind are that these are an aftermarket replacement rather than a factory part and long-term durability versus factory-quality injectors can vary by driving style and maintenance. Also diagnostic matching or flow-testing may be needed if you require closely matched flow rates for high-performance tuning.
Best for: Performance-oriented owners who prioritize restoring engine response and combustion quality on an Acura TSX 2010–2014 and who are comfortable fitting aftermarket replacements or having a shop install them.
Less Ideal for: Buyers seeking a guaranteed factory-identical long-term solution or those planning precision engine tuning who need professionally flow-matched injectors should consider OEM or performance-grade alternatives.
- Sold as a full set of six for complete bank replacement on V6 TSX engines
- Preinstalled O-rings and blade terminals simplify installation and reduce parts hunting
- Injector design claims improved atomization for smoother idle and better combustion
- Compatible fitment listed specifically for TSX 2010–2014 V6 3.5L, reducing fitment guesswork
- Aftermarket construction may not match long-term durability of factory-quality injectors
- No factory-matched flow-test data included, so professional balancing may be required for performance builds
Verdict A practical, ready-to-install six-injector kit for TSX owners wanting to restore throttle response and combustion quality without sourcing individual parts.
4. Germban Fuel Injectors (16450-R70-A01) — 6-Pack Direct Replacement
| Manufacturer | Germban |
|---|---|
| Manufacturer Part Number | 16450-R70-A01 |
| Compatible Engine | 3.5L V6 |
These Germban fuel injectors are sold as a direct replacement set intended to restore fuel delivery on compatible V6 engines. Installed as a one-for-one swap, the injectors are used to atomize fuel into the intake for combustion and are typically fitted when old injectors are leaking, clogged, or causing rough idle and reduced fuel economy. The listing highlights factory-replacement fitment and corrosion-resistant construction, which should simplify installation and long-term durability for routine driving. Because this is a budget-oriented aftermarket unit, you get a full six-injector set so you can replace all cylinders at once and avoid mismatched flow rates. Limitations to consider are typical of low-cost aftermarket injectors: flow tolerances and longevity may vary compared with higher-end branded units, and thorough testing or flow-matching after installation is advisable for best performance. For a cost-focused repair that returns drivability quickly, this set is a practical choice, but drivers seeking maximum longevity or precision tuning may prefer a premium OEM-equivalent injector.
Best for: Budget-conscious buyers who prioritize restoring drivability or replacing worn injectors on an Acura TSX without paying for premium branded units.
Less Ideal for: Drivers planning precision engine builds, high-performance tuning, or those who want the longest-lasting OEM-equivalent service life should consider higher-grade injectors.
- Sold as a complete six-injector set so all cylinders can be replaced at once
- Marketed as a direct replacement for factory units to simplify installation
- Manufacturer states corrosion-resistant construction for durability
- Includes multiple reference part numbers to help match existing injectors
- Aftermarket budget units may have wider flow tolerances than premium or factory-quality injectors
- Limited documentation on testing and flow-matching from the manufacturer
Verdict A cost-effective six-pack of direct-replacement injectors suitable for a budget TSX repair but not a substitute for high-precision or long-life premium injectors.
5. TSSLIIN Fuel Injector (fit for Acura TSX/ILX 2.4L)
| Fitment | Acura TSX/ILX L4 2.4L 2009-2014 |
|---|---|
| Manufacturer Part Number | TSS0280158233 |
| Position | Front Inner |
These TSSLIIN fuel injectors are sold as factory-style replacements for the Acura TSX/ILX 2.4L (2009–2014). They are intended to restore proper fuel atomization and timing after injector wear, which helps smooth idle, reduce misfires, and recover fuel economy. The listing emphasizes stainless steel internal components and quality control aimed at meeting factory fit, form, and function, so they can be used in a routine injector swap without major modifications. Installation is the same as a standard injector replacement and is commonly done during maintenance or when diagnostics point to a failing injector. Buyers should expect practical benefits such as improved drivability and more consistent idling, but be aware that long-term durability depends on proper installation and fuel system condition. These injectors are a sensible choice for owners who want a near-factory replacement rather than an aftermarket performance upgrade, while technicians should verify part number compatibility with the vehicle before fitting.
Best for: Risk-averse mainstream owners seeking a dependable, factory-style replacement to resolve rough idle or fueling issues on an Acura TSX/ILX 2.4L without pursuing performance modifications.
Less Ideal for: Drivers building higher-power engines or tuning for increased fuel flow should choose purpose-built performance injectors instead.
- Listed to fit Acura TSX and ILX 2.4L 2009–2014 for direct replacement.
- Constructed with stainless steel sliders and springs intended to extend injector life.
- Marketed to meet factory fit, form, and function for straightforward installation.
- Designed to improve idle stability and fuel atomization for better combustion.
- No long-term durability data provided beyond manufacturer claims.
- Not described as a high-flow or tuned performance injector for power builds.
Verdict A practical factory-style replacement injector for Acura TSX/ILX 2.4L owners who want reliable, serviceable fueling rather than a performance upgrade.
6. STZJAYE Fuel Injectors Set of 4 (compatible with Acura TSX 2009-2014)
| Brand | STZJAYE |
|---|---|
| Fitment (engine) | L4 2.4L for Acura TSX 2009-2014 |
| Quantity | Set of 4 |
These STZJAYE fuel injectors are a direct-replacement set intended to restore proper fuel delivery on the Acura TSX 2009–2014 with the 2.4L four-cylinder. Installed as a set, they atomize fuel to improve throttle response, smooth out acceleration, and reduce hesitation that comes from worn or clogged injectors. The parts are sold as a matched kit and reviewers report factory-style fitment and straightforward plug-and-play installation, which makes them practical for a DIY swap or a quick shop job. Because they are aftermarket units, they focus on reliable basic function and fuel metering rather than performance gains, so expect stock-equivalent behavior rather than increased power. Buyers should plan routine cleaning and proper installation to protect longevity. If your TSX has rough idle, poor fuel economy, or injector-related check-engine codes, this set offers an affordable way to return the engine to normal operation without complicated tuning.
Best for: Practical optimizers looking for a cost-effective, no-frills replacement to restore reliability and everyday drivability on an Acura TSX 2009–2014.
Less Ideal for: Drivers seeking high-performance or modified fuel delivery for tuned engines should choose performance-oriented injectors instead.
- Packaged as a matched set of four for cylinder-to-cylinder consistency
- Designed for direct fit and factory-style alignment with the TSX fuel rail and ports
- Restores smooth throttle response and reduces hesitation when replacing failing injectors
- Aftermarket design focuses on stock-level performance rather than increased flow or tuning potential
- Limited published manufacturer technical data and long-term durability history is not provided
Verdict A budget-friendly, plug-and-play replacement that restores factory-style fuel delivery on the Acura TSX 2009–2014 without performance upgrades.
7. NECATUO Set of 6 Fuel Injectors (Replaces FJ982 / 16450R70A01)
| Manufacturer | NECATUO |
|---|---|
| OEM Part Number | FJ982, 155-0459, 16450R70A01 |
| Manufacturer Part Number | NEC-PYZ2-6P-FJ982 |
These NECATUO fuel injectors are a full six-pack replacement intended to match factory-style fuel delivery for compatible Acura engines. They are typically used when original injectors cause rough idle, poor acceleration, or misfires; swapping all six at once helps restore even fueling across cylinders. The injectors are made to OE-spec dimensions with corrosion-resistant composite bodies and high-temperature viton O-rings, which helps with longevity and sealing in a hot engine bay. In practice this kit delivers predictable spray and improved engine smoothness when installed and calibrated on the vehicle. Installation is straightforward for a competent DIYer or tech, and the set includes the common OEM reference numbers for fitment checks. Limitations are that you must confirm fitment to the TSX's exact engine variant before buying, and aftermarket injectors can vary slightly from factory units so professional cleaning or flow matching may be needed for best results on high-mileage engines.
Best for: Balanced all-round buyers who want a cost-effective full injectors replacement to restore smooth running and predictable fueling on their Acura TSX without hunting down individual units.
Less Ideal for: Drivers seeking direct OEM parts from the factory brand or those who prefer pre-flow-matched, performance-tuned injectors for high-power builds should consider other options.
- Sold as a complete set of six for consistent cylinder-to-cylinder fuel delivery
- Designed to factory-spec references for straightforward fitment checks
- Corrosion-resistant composite construction and viton O-rings for durability
- Customers report restored engine smoothness and improved acceleration after replacement
- Requires confirming exact TSX engine fitment before purchase
- May need professional flow matching or cleaning for optimal performance on high-mileage engines
Verdict A practical, full-set replacement that restores balanced fueling for compatible Acura TSX engines, provided you verify exact engine fitment and consider flow matching on older motors.
Choosing the Right Acura TSX Fuel Injector: Key Factors to Consider
Flow Rate And Consistency
Flow rate determines how much fuel each injector delivers at a given pulse width. Consistent flow across all injectors is essential to maintain balanced cylinder fueling and avoid misfires. Variations in flow can cause one cylinder to run lean or rich, producing rough idle, uneven power delivery, and potentially increased emissions. When evaluating flow, look for specifications or test data showing measurement tolerance. Even small percent differences can matter in a multi-cylinder engine. Consistency under different operating conditions helps ensure predictable fueling as engine load and RPM change.
Spray Pattern And Atomization
Spray pattern controls how fuel mixes with incoming air. Good atomization produces a fine mist that mixes more completely with air, improving combustion efficiency and throttle response. A poor spray pattern can lead to wet intake ports, incomplete combustion, and hesitation under acceleration. Different engines favor particular spray geometries, so an injector that produces a uniform cone or targeted multi-hole pattern suited to the intake design will typically yield better drivability. Consider whether the pattern reduces pooling on the port walls and promotes even distribution across the intake tract.
Electrical Compatibility And Response Time
Injectors must match the vehicle's electrical characteristics, including impedance and recommended drive current. Incorrect electrical characteristics can lead to erratic injector operation, overheating, or failure. Response time matters too; faster response provides more precise fuel metering, especially during rapid throttle changes. Confirm the injector's nominal resistance and ensure it works with the TSX's fuel injector drivers. Stable electrical performance helps maintain consistent pulse widths and predictable fueling under all driving conditions.
Materials, Seals, And Corrosion Resistance
Injector body materials and internal components influence longevity. Corrosion-resistant materials and high-quality internal coatings reduce wear from fuel additives and contaminants. Leak-resistant seals and durable O-rings prevent vacuum leaks, fuel seepage, or loss of pressure that can degrade performance. Inspect specifications for compatible seal materials and whether replacement seals are available. Long-term reliability often depends on these small parts, so prioritize injectors built with durable materials and serviceable sealing components.
Serviceability And Fitment
Direct-fit injectors that match OEM dimensions and electrical connectors reduce installation time and eliminate the need for adapters or harness modifications. Serviceable designs that allow replacement of O-rings, filters, or pintle caps extend usable life and simplify maintenance. Check whether the injector includes necessary mounting hardware or rebuild kits. Ease of installation and availability of spares affects lifecycle cost and the complexity of routine maintenance or repairs.
Testing And Quality Control
Quality control processes such as flow-bench testing, ultrasonic cleaning, and final electrical checks ensure consistent performance across production batches. Injectors that have documented testing procedures or batch reports give more confidence in reliability and uniformity. Look for suppliers that provide test data, or use third-party verification. Consistent manufacturing tolerances reduce the likelihood of outliers and ensure each injector performs as expected once installed.
FAQ
What are common symptoms of a failing fuel injector in an Acura TSX?
Common signs include rough or uneven idle, hesitation under acceleration, and a noticeable drop in throttle responsiveness. You may also detect strong fuel odors or occasional misfires. Symptoms often vary depending on whether the issue is clogging, electrical failure, or a leaking injector.
How do you test a fuel injector on an Acura TSX?
Testing often begins with an electrical resistance check to confirm coil continuity and impedance. A fuel injector flow test or a balance test on a flow bench gives quantitative data on delivery consistency. For on-vehicle diagnosis, listening for injector operation with a stethoscope or using a scan tool to monitor injector pulse can be helpful.
Can fuel injectors be cleaned instead of replaced?
Cleaning can restore performance when injectors are mildly clogged by deposits. Professional ultrasonic cleaning and flow testing are commonly used to remove buildup and verify restored operation. However, severely damaged or worn injectors may not respond to cleaning and will require replacement.
What causes fuel injector leaks and what are the symptoms?
Leaks usually stem from damaged seals, degraded O-rings, or cracks in the injector body. Symptoms include fuel odor, visible wetness around the intake or injector area, rough running, and potential hard starts. Addressing leaks promptly is important for safety and to prevent engine performance issues.
Is upgrading fuel injectors necessary for performance improvements?
Upgrading injectors can be beneficial when other upgrades increase fuel demand, such as higher flow heads, forced induction, or significant tuning changes. For stock engine setups, OEM-equivalent injectors are typically sufficient. Any upgrade should be matched to tuning and fueling strategy to avoid drivability problems.
How often should fuel injectors be inspected on an Acura TSX?
Routine inspection intervals depend on driving conditions and fuel quality, but a visual check and basic electrical test every 30,000 to 60,000 miles is common practice. If you experience drivability issues, inspect sooner. Regular maintenance such as replacing seals and using quality fuel can extend injector life.
How We Chose the Best Acura TSX Fuel Injector
We focused on criteria that directly affect drivability and long-term reliability for the Acura TSX. Primary filters included measured flow accuracy and spray pattern consistency, since uneven delivery or poor atomization leads to rough idle and reduced efficiency. Durability and materials were assessed to ensure resistance to common fuel contaminants and thermal stress in the engine bay. Electrical compatibility and connector quality were considered to avoid fitment issues and unreliable signal transmission. Serviceability and availability of replacement seals or O-rings were also part of the evaluation, since routine maintenance often involves replacing those components. We excluded units that lacked clear specification data, ambiguous flow ratings, or that required vehicle-specific modifications. Cheap, unverified parts with no documentation were not considered. The result is a list of injectors that meet practical standards for performance, longevity, and direct fit compatibility with the Acura TSX platform.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a replacement injector for an Acura TSX, prioritize flow accuracy, spray pattern, and electrical compatibility to maintain smooth idle and consistent throttle response. Durability, corrosion resistance, and serviceability are important tradeoffs that affect long-term reliability and maintenance effort. Balance the need for precise fueling with ease of installation and the availability of replacement seals or testing documentation. Focusing on these criteria will help ensure predictable drivability and reduce the likelihood of repeat repairs.
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