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If your Infiniti FX35 is showing rough idling, hesitation, or reduced throttle response, choosing the right fuel injector matters for drivability and long-term engine health. This guide covers the top shortlisted fuel injectors selected for the Infiniti FX35 and explains the functional differences that typically affect everyday use. We evaluated candidates based on fitment accuracy, flow rate consistency, spray pattern, and durability under typical driving conditions. Read on to see the top picks and the criteria that informed our selections.
Looking for other parts? See all Infiniti FX35 parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | A-Premium Fuel Injectors Set of 6 Compatible with Infiniti FX35 and Nissan 3.5L Engines |  |
| Best Quality Built to a higher standard if you want something more solid | IXGKHC Set of 6 Fuel Injectors Replacement for Infiniti FX35 / Nissan 3.5L V6 |  |
| Best Value The sweet spot between price and what you get | AISHAN Fuel Injectors (6-pack) Compatible with Infiniti FX35 3.5L V6 |  |
| Best budget The cheapest option that still gets the job done reliably | SCITOO Fuel Injector (6-pack) for Infiniti FX35/EX35/G35/M35/QX60 fitments |  |
| Highest Rated A top-rated pick with lots of positive feedback | TRQ Fuel Injector Set for Infiniti FX35 / G35 / M35 / Nissan 350Z / Murano (6-Pack) |  |
| Most popular A crowd favorite that many people choose with confidence | Pjvmvo FBJC100 Fuel Injectors (Set of 6) |  |
| Best Seller A high-volume bestseller chosen again and again | A-Premium Fuel Injector Set (Pack of 6) Compatible with Infiniti FX35 3.5L |  |
1. A-Premium Fuel Injectors Set of 6 Compatible with Infiniti FX35 and Nissan 3.5L Engines
| Compatible engines | V6 3.5L (Infiniti/Nissan) |
|---|---|
| Terminal type | Male blade |
| O-rings | Preinstalled |
| Nozzle hole quantity | 12 holes |
| Manufacturer part number | APFI402 |
These A-Premium fuel injectors are a direct-replacement style unit sold as a set of six for V6 3.5L Nissan and Infiniti models including the FX35. They install like factory injectors and come with preinstalled O-rings and male blade terminals so you can swap them into the rail with minimal plumbing work. The injector uses a metal and composite plastic body with a 12-hole nozzle intended to improve fuel atomization for smoother idle, more consistent throttle response, and potential fuel economy gains versus damaged or clogged injectors. Real-world benefits include resolving leaks, rough idle, and poor fuel delivery without custom tuning. Limitations are typical of aftermarket replacements: performance is close to factory spec but not a high-end performance upgrade, and gasket hardness may vary from OEM so careful handling on install is advised. A-Premium backs the part with a one-year unlimited-mileage guarantee for reassurance after fitment.
Best for: A balanced all-round buyer who wants an affordable, full-bank replacement to restore drivability on a 3.5L Infiniti without chasing performance parts.
Less Ideal for: Drivers seeking high-flow performance injectors or those who prefer verified OEM parts from dealer channels should consider alternative options.
- Sold as a complete six-pack matched to V6 3.5L fitment for full-bank replacement
- Preinstalled O-rings and standard blade terminals simplify installation
- 12-hole nozzle design aimed at finer fuel atomization and smoother running
- Construction mixes metal and composite for a balance of durability and cost
- Not a performance-oriented injector; aimed at OEM-level replacement rather than increased flow
- Some buyers report softer intake-side gaskets compared with factory parts which requires careful handling during install
Verdict: A practical full-bank replacement set that restores fuel spray and drivability on 3.5L Infiniti FX35 engines with easy, like-for-like installation.
2. IXGKHC Set of 6 Fuel Injectors Replacement for Infiniti FX35 / Nissan 3.5L V6
| Brand | IXGKHC |
|---|---|
| Fitment Type | Direct Replacement |
| OEM Part Number | 16600-CD700 / 0280158042 |
These six fuel injectors are offered as direct replacements for Infiniti FX35 and compatible Nissan 3.5L V6 models and are intended to restore proper fuel delivery when original injectors fail or clog. Installation is typical for injector replacement jobs: remove the intake components to access the fuel rail, swap the old injectors for the new units and reuse or replace seals as needed. The listing emphasizes factory-fit dimensions and quality control checks to promote smooth engine operation, reduced misfires, and improved fuel economy versus worn injectors. Practical benefits include supplying matched injectors in a full set for even fuel distribution across all cylinders and a direct-fit approach that keeps installation straightforward for experienced DIYers or technicians. Limitations are that the product is an aftermarket brand rather than a factory part, which can produce variable results between vehicles, and one user report notes a vehicle that would not start after installation, so careful verification of fitment, connector compatibility, and bench testing are advisable before committing to full installation.
Best for: Performance-oriented buyers who want to restore consistent fuel delivery and engine smoothness on an Infiniti FX35 by replacing all injectors at once to regain throttle response and efficiency.
Less Ideal for: Buyers seeking guaranteed factory-brand parts or those who prefer dealer-supplied injectors with verified vehicle-by-vehicle validation should consider alternatives.
- Sold as a matched set of six to ensure consistent fuel delivery across all cylinders
- Advertised as direct-fit replacements to simplify installation for this engine family
- Manufacturer states multiple quality control checks during production
- Aftermarket brand rather than factory part which may lead to variability in fit or performance
- At least one customer report of a no-start condition after installation on a Murano
Verdict: A full set of direct-fit aftermarket injectors intended to restore smooth operation and balanced fuel delivery for Infiniti FX35 3.5L V6 engines.
3. AISHAN Fuel Injectors (6-pack) Compatible with Infiniti FX35 3.5L V6
| Fitment | Infiniti FX35 3.5L V6 2005-2008 |
|---|---|
| Number of ports | 4 |
| Terminals | 2 pins |
| Material | Composite plastic and stainless steel |
These AISHAN fuel injectors are sold as a six-piece kit intended as a direct replacement for the factory injectors on the Infiniti FX35 3.5L V6. They use a four-hole atomizing nozzle and two-pin electrical connection to deliver a wider spray angle for more complete fuel-air mixing, which the manufacturer says helps reduce vibration, restore smooth idle, and improve fuel efficiency. The injectors come pre-installed with viton O-rings and stainless steel/composite construction aimed at resisting leaks under higher pressures. Installation is plug-and-play for someone comfortable with basic engine work and the listing includes simple steps for removal and reinstallation. Limitations to note are that these are aftermarket parts rather than factory-brand injectors and claimed performance gains are manufacturer statements rather than independent test results. Also proper cleaning of ports and attention to connector condition are needed during fitment to avoid issues. For a budget-minded replacement on an FX35, this kit offers a complete set and straightforward swap-in capability.
Best for: Practical optimizers looking for an affordable, complete injector replacement for the Infiniti FX35 who prioritize fixing drivability issues and restoring smooth operation without paying for dealer parts.
Less Ideal for: Drivers seeking factory-brand injectors backed by dealer testing or professional shops that prefer to source OEM-specified parts should consider alternatives.
- Sold as a full six-injector kit to replace all cylinders at once
- Four-hole atomizing nozzle for broader spray and more complete combustion
- Pre-installed viton O-rings and stainless/composite construction to reduce fuel leaks
- Designed for plug-and-play installation with a factory-style two-pin connector
- Aftermarket unit so performance and longevity may vary compared with factory-brand injectors
- Manufacturer performance claims such as specific horsepower or torque gains are not independently verified
Verdict: A full six-pack aftermarket kit that makes replacing all injectors on an Infiniti FX35 affordable and straightforward, but it is an aftermarket option rather than a factory-brand part.
4. SCITOO Fuel Injector (6-pack) for Infiniti FX35/EX35/G35/M35/QX60 fitments
| Package | 6pcs Fuel Injector |
|---|---|
| Orifice Type | 12 holes disc |
| Fuel Type | Petrol |
| OE Part Number | 16600-JK20A |
These SCITOO fuel injectors are sold as a six-pack intended to replace worn units on compatible Infiniti engines. They install in the factory fuel rail and are used to restore proper fuel metering and spray atomization when injectors are leaking or clogged. The listing emphasizes OEM-equivalent flow rate and includes O-rings to help prevent fuel vapor leaks. In practice this means the parts should re-establish smooth idle, easier starts, and more consistent acceleration compared with degraded injectors. The injectors use a multi-hole orifice design aimed at finer atomization, which supports drivability and fuel economy when matched to the original calibration. Limitations to note are that these are aftermarket replacements rather than factory parts and fitment must be confirmed against the vehicle VIN and OE part number before installation. Professional installation or careful bench testing is recommended to avoid compatibility or sealing issues when swapping all six units on an Infiniti engine.
Best for: Budget-conscious Infiniti owners who prioritize replacing a full set of injectors affordably to restore drivability and reduce fuel-related issues.
Less Ideal for: Drivers seeking guaranteed factory-brand longevity or those who prefer professional remanufactured injectors with documented testing should consider other options.
- Sold as a complete six-pack for multi-cylinder Infiniti engines so all injectors can be replaced at once
- Manufacturer states flow rate matches original to maintain engine calibration
- Includes O-rings to address common sealing and leak issues
- Multi-hole orifice design promotes finer fuel atomization for smoother acceleration
- Aftermarket unit rather than factory-made so exact longevity and tolerance match can vary
- Fitment requires verifying OE part number or VIN to ensure correct application
Verdict: A cost-focused six-pack solution that restores fuel delivery for compatible Infiniti models but requires careful fitment verification and accepts the usual variability of aftermarket parts.
5. TRQ Fuel Injector Set for Infiniti FX35 / G35 / M35 / Nissan 350Z / Murano (6-Pack)
| Brand | TRQ |
|---|---|
| Set Name | Fuel Injector Set |
| Number of Pieces | 6 |
| Material Type | Metal |
| Manufacturer Warranty Description | 2 years |
This TRQ fuel injector set supplies six direct-replacement injectors intended for V6 Infiniti FX35, G35, M35 and compatible Nissan 350Z and Murano models. It is typically used when worn or leaking injectors cause misfires, poor throttle response, or reduced fuel economy. The kit is advertised as pre-assembled for plug-and-play installation and TRQ provides installation videos to help DIYers. The metal construction and machined finish suggest a focus on durability and consistent spray delivery, which can restore smooth idle and throttle response. Some buyers report reliable fit and improvement in drivability, while others note missing seals and at least one warranty/service complaint, so check included hardware before starting installation. Expect to spend time on correct sealing and careful installation; this is a repair for someone comfortable with engine bay work. The set targets reliability-minded owners seeking a factory-replacement style solution that simplifies swapping all six injectors at once.
Best for: A reliability-focused buyer who prefers a factory-style replacement and is comfortable doing engine repairs or supervising a shop to restore smooth running and consistent fuel delivery.
Less Ideal for: Drivers who want a turnkey shop-installed solution without verifying included hardware or those who prefer upgraded performance injectors rather than like-for-like replacements.
- Sold as a complete 6-piece kit for replacing all V6 injectors at once
- Pre-assembled, direct-fit design intended for plug-and-play installation
- Metal construction with machined finish aimed at consistent spray and durability
- Manufacturer provides step-by-step installation videos to assist DIY repair
- Some customers report injectors shipped without necessary seals or O-rings
- A few buyers experienced part failures and had mixed outcomes with replacements or refunds
Verdict: A complete, direct-fit 6-injector kit aimed at restoring reliable fuel delivery on the listed Infiniti and Nissan V6 models.
6. Pjvmvo FBJC100 Fuel Injectors (Set of 6)
| Fitment note | Compatible with Infiniti FX35 3.5L V6 (2001-2004) as listed |
|---|---|
| Set quantity | Set of 6 |
| Included parts | O-rings and gaskets included |
| Part numbers referenced | Replace# 166005L700, FJ653 |
These Pjvmvo FBJC100 injectors are a direct-fit replacement set intended to restore metering and atomization for a 3.5L V6 Infiniti engine. Sold as a set of six, the injectors arrive flow tested and balanced with O-rings and gaskets included to simplify installation. In typical use they replace worn or leaking units to recover steady idle, smoother acceleration, and more consistent fuel trims; the listing notes retained OEM duty cycle and pulse width so they work with factory fuel control strategies. Practical benefits include plug-and-play fitment for the specified vehicles, pre-testing at the factory, and included sealing parts to reduce installation headaches. Limitations are that this is an aftermarket component rather than a factory part and long-term durability may vary with fuel quality and driving conditions; professional installation or calibration checks are recommended if the vehicle has other fuel- or air-system faults. For owners focused on convenience, these injectors are a straightforward way to get a problematic engine back to normal operation without complex modifications.
Best for: Convenience-driven owners who want a quick, plug-and-play repair to restore drivability on an Infiniti FX35 with a 3.5L V6 and prioritize a simple installation and included hardware.
Less Ideal for: Buyers looking for an exact factory-manufactured injector or those planning performance tuning that requires custom flow rates should consider alternative options.
- Direct-fit replacement designed for the specified 3.5L V6 Infiniti application
- Set of six units shipped with O-rings and gaskets for easier installation
- Flow tested and balanced at manufacture to help ensure even fuel delivery
- Retains factory duty cycle and pulse width for compatibility with stock fuel control
- Aftermarket part so long-term durability may not match factory-original units
- Requires correct fitment verification and proper installation to avoid drivability issues
Verdict: A convenient, plug-and-play aftermarket set that restores fuel delivery for the FX35 3.5L V6 without requiring extra parts or modification.
7. A-Premium Fuel Injector Set (Pack of 6) Compatible with Infiniti FX35 3.5L
| Number of Ports | 6 |
|---|---|
| Inlet Connection Type | Blade |
| Outlet Connection Type | FIP |
| Material Type | Metal, Plastic |
| Static flow | 147 ml/30s |
These A-Premium injectors are a direct-replacement style kit sold as a pack of six for the 3.5L V6 used in the Infiniti FX35. They install like factory injectors and include preinstalled O-rings and standard blade terminals so swapping the full bank is straightforward for a DIYer or technician. The nozzle design and stated static/dynamic flow rates aim to restore proper atomization for smoother idle, reduced misfires, and improved fuel economy when worn injectors are the issue. Practical benefits include full-bank replacement to avoid mixing old and new units and a one-year unlimited-mileage guarantee covering the item cost. Limitations to expect are the variable results some owners report with starting/cranking behavior and the fact these are aftermarket units made from metal and composite plastic rather than factory-branded parts, which can mean slightly different flow characteristics. For best results, clean rail and connectors and verify fuel pressure when replacing injectors to isolate other causes of drivability problems.
Best for: Risk-averse mainstream buyers who prioritize restoring reliable, everyday drivability and fuel economy on an Infiniti FX35 without chasing OEM parts or performance upgrades.
Less Ideal for: Shoppers seeking factory-branded injectors for exact original-spec flow or tuners wanting high-performance injectors for modified engines should look at other options.
- Sold as a complete six-injector set so all cylinders receive matched units
- Preinstalled O-rings and standard blade terminals simplify installation
- Nozzle design and listed flow rates aimed at restoring atomization for smoother running
- Includes a one-year unlimited-mileage guarantee on the part cost
- Aftermarket construction (metal and composite plastic) may not match factory-brand long-term durability
- Some users reported altered crank/starting behavior after installation
Verdict: A convenient full-bank replacement kit made to restore drivability and fuel economy for the Infiniti FX35 3.5L.
Choosing the Right Infiniti FX35 Fuel Injector: Key Factors to Consider
Fitment and Connector Compatibility
Accurate physical fit and matching electrical connectors are essential because incorrect fitment can lead to leaks, poor electrical contact, and diagnostic trouble codes. Ensure the injector body length, O-ring diameters, and mounting interface align with the Infiniti FX35 fuel rail and intake manifold to avoid installation complications.
Connector compatibility matters for reliable signal transmission from the engine control module. Mismatched pins or housings may require splicing or adapters, which can introduce failure points. Choosing an injector with OEM-style connectors reduces installation time and the risk of intermittent faults.
Flow Rate and Calibration
Flow rate determines how much fuel the injector delivers at a given pulse width and rail pressure. An injector with flow characteristics that deviate from the factory specification can cause lean or rich running conditions, leading to poor idle quality, reduced performance, or higher emissions. Look for injectors that are rated or tested to match the FX35 factory flow curve.
Consistent flow across all injectors is also important. Variance between injectors can create cylinder imbalance, roughness, and uneven wear. If a set is supplied, check that the vendor provides flow-matched data or offers tested groupings to minimize cylinder-to-cylinder variation.
Spray Pattern and Atomization
The injector spray pattern affects how fuel mixes with incoming air and where fuel lands in the intake port or combustion chamber. A proper pattern promotes finer atomization, which supports more complete combustion, smoother idle, and better throttle response. For direct fit applications, choose injectors designed to replicate the original spray characteristics for the FX35 engine.
Poor atomization or an asymmetric spray can lead to carbon buildup, rough running, and cold-start issues. Consider injectors that are specified for good spray quality or that come with laboratory spray visualization data when available.
Seal Materials and Leak Resistance
Injector seals and O-rings must withstand fuel, heat cycling, and vibration. Degraded seals allow external leaks or air ingress that disturb fuel metering, which may cause rough idle or fuel odor. Different materials perform better with varied fuel formulations and temperatures, so select injectors with compatible polymers for the operating environment of the FX35.
Pay attention to how the injector interfaces with the rail and intake. Robust sealing design reduces the likelihood of rail-to-intake vacuum leaks and helps maintain consistent fuel pressure at the injector inlet.
Electrical Characteristics and Response Time
Electrical coil design and armature mass determine the injector's response time and how quickly it opens and closes. Fast, consistent response improves metering precision at low pulse widths, which is important for smooth idle and transient throttle response. Electrical impedance should be compatible with the FX35's fuel injection drivers to avoid overloading the control circuitry.
Also consider thermal stability of the coil and housing. Components that tolerate repeated heat cycles without drifting in performance help preserve long-term drivability and reduce the chance of intermittent faults.
Serviceability and Cleaning
No injector is immune to contamination, so the ability to clean and restore spray quality matters. Some injectors tolerate ultrasonic or professional cleaning better than others, and construction choices influence how often cleaning is required. Choose injectors with accessible service data and recommended cleaning intervals to keep the FX35 running well.
Additionally, consider the availability of replacement seals and the ease of removing and reinstalling injectors. Simpler service reduces labor time and the risk of installation errors during maintenance.
How We Chose the Best Infiniti FX35 Fuel Injector
We narrowed candidates by focusing on components designed specifically for the Infiniti FX35 engine and matching original equipment flow specifications. Key evaluation criteria included fitment and connector compatibility, measured flow rate consistency across injectors, spray pattern quality that affects combustion efficiency, materials and seals that resist common failure modes, and expected service life under normal driving conditions. We also considered electrical characteristics to ensure proper operation with the factory fuel management system and tested reports of clogging resistance and ease of maintenance. Exclusions included universal or generic injectors without documented FX35 compatibility, injectors requiring extensive modification to install, and components with unresolved reliability concerns. The result is a list of injectors that meet the practical demands of installation, driveability, and routine maintenance for the Infiniti FX35.
Our full evaluation process is outlined in our review methodology.
FAQ
What are common symptoms of a failing fuel injector on an Infiniti FX35?
Common signs often include rough idle, hesitation or stumbling under acceleration, and occasional misfires. You may also notice reduced fuel economy or a strong fuel smell if an injector is leaking. These symptoms can vary in intensity and may appear intermittently depending on the failure mode.
Can I clean fuel injectors myself or should I seek professional service?
Light cleaning with recommended additives may help with minor deposits, but deeper clogging often requires professional ultrasonic cleaning or flow testing. If symptoms persist after basic maintenance, a professional service can diagnose flow and spray pattern issues and determine whether replacement is necessary.
How do I know if an injector is electrically faulty on my FX35?
Electrical faults can show up as misfires or trouble codes related to fuel trim or injector circuit faults. You can check coil resistance with a multimeter and compare readings across injectors, but matching expected values does not guarantee proper operation. Diagnostic testing with a scope or a specialized injector tester provides more definitive information.
Are all replacement injectors the same quality for the Infiniti FX35?
No. Injectors vary in manufacturing tolerances, materials, and testing standards. Choose options that specify fitment for the FX35 and provide flow-matched data or documented testing to reduce the risk of driveability issues. Avoid generic units without compatibility documentation.
What maintenance helps extend fuel injector life?
Using appropriate fuel, following recommended fuel filter service intervals, and addressing intake and PCV system issues can reduce contamination risk. Periodic inspection and professional cleaning when deposits are suspected help maintain spray quality and consistent flow over time.
Conclusion
When replacing injectors on an Infiniti FX35, prioritize fitment, flow consistency, and spray quality to preserve smooth idle and reliable throttle response. Balance ease of installation and serviceability against electrical and sealing robustness to minimize future problems. Expect tradeoffs between long-term durability and replaceability. Focus on injectors that match the FX35 specifications and offer clear service data so you can maintain performance without unexpected drivability issues.
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