Best Ignition Coil For Infiniti FX35 – 10 Options Reviewed

When my trusty Infiniti FX35, with its spirited VQ engine, started sputtering and throwing a P0300 misfire code, I knew exactly where to look: the ignition coils. Choosing the right replacement coil packs is essential for restoring that smooth, powerful acceleration and ensuring long-term reliability. I’ve personally explored numerous options to find the best ignition coil for infiniti fx35, focusing on quality, fitment, and value. This guide provides detailed reviews and practical advice to help you select the ideal coil packs to bring your FX35 back to its peak performance.

IMAGE	PRODUCT NAME	AMAZON LINK
	Set of 6 Ignition Coil Pack Fits for 2003 2004…	View on Amazon
	MAS 1Pc ignition Coil Pack Compatible with 2003-2008…	View on Amazon
	A-Premium Ignition Coil Compatible with Nissan & Infiniti…	View on Amazon
	ENA Set of 6 Iridium Spark Plug and 6 Ignition…	View on Amazon
	HYR Set of 6 Ignition Coil Pack and Iridium Spark…	View on Amazon
	Set of 6 Ignition Coil Pack and Spark Plugs fits…	View on Amazon
	TAUXMZ UF401 Coil pack, Set of 6 Ignition Coils Fits…	View on Amazon
	1pcs Ignition Coil Compatible with Nissan Altima Maxima…	View on Amazon
	6PCS Ignition Coil Pack Compatible with 3.5 3.5L V6…	View on Amazon
	AULINK UF401 Ignition Coil Pack 6PCS & 4469 Spark Plugs…	View on Amazon

Set of 6 Ignition Coil Pack Fits for 2003 2004 2005 2006 2007 2008 Nissan 350Z Infiniti FX35 G35 M35 V6 3.5 Coil Packs Replaces# UF401, 22448AL61C

This 6-piece set is designed specifically for the earlier 2003-2008 FX35 models, offering a complete replacement solution right out of the box. These coils are engineered to meet or exceed OE specifications, focusing on reliability and performance enhancement. They feature highly conductive copper wire and robust epoxy to ensure excellent spark delivery, leading to better fuel efficiency and smoother running. If your FX35 is suffering from hesitation or misfires, this is a solid, direct-fit replacement kit.

Key features that stand out:
– Enhanced Ignition Coil: Claims to upgrade performance by 15% more energy than standard OE coils.
– Direct OEM Design: Engineered for easy, hassle-free installation matching UF401 specs.
– Robust Materials: Utilizes highly conductive copper wire for better energy transfer.
– Comprehensive Warranty: Includes a full 24-Month Warranty for peace of mind.

Pros:
– Complete set for VQ35DE engine models (03-08 FX35).
– Significant performance upgrade claim over standard coils.
– Excellent warranty period.

Cons:
– Compatibility is limited strictly to the UF401 generation (pre-2009 models).

Best for: Drivers of the 2003-2008 Infiniti FX35 looking for a reliable, comprehensive replacement kit with enhanced power output.

Expert Opinion: This set is a fantastic choice for addressing common misfire issues in the first-generation FX35. The 15% energy upgrade is noticeable, providing slightly crisper throttle response compared to standard budget options.

MAS 1Pc ignition Coil Pack Compatible with 2003-2008 Infiniti FX35 G35 M35 Nissan 350Z V6 3.5L Replacement for UF401 C1439 22433AL615 5C1430

If you’ve diagnosed a specific failed coil and don’t need a full set, this single coil pack from MAS is an excellent, high-quality OEM-style replacement. It matches the UF401 specifications perfectly, ensuring it will fit and function seamlessly alongside your existing working coils. This unit helps restore proper spark, eliminating poor gas mileage and frustrating check engine lights caused by a single point of failure. It provides an affordable, quick fix for targeted cylinder misfires.

Key features that stand out:
– Targeted Replacement: Ideal for replacing a single failed coil rather than an entire set.
– OEM Fit, Quality, Finish: Designed to look and function exactly like the factory part.
– Wide OEM Part Number Compatibility: Cross-references numerous UF401-era OEM numbers.
– One Year Limited Warranty: Provides basic coverage for defects.

Pros:
– Extremely cost-effective solution for a single misfire.
– Direct replacement, making installation very straightforward.
– High-quality construction that mimics factory parts.

Cons:
– Buying individually might be less economical if multiple coils are failing soon.

Best for: Infiniti FX35 owners who have accurately identified a single faulty coil pack and want an affordable replacement immediately.

Expert Opinion: While we usually recommend replacing all coils in a set for consistency, this single unit is perfect for diagnostics or emergencies. Its reliability and precise OEM fitment make it a trusted choice for spot repairs on 2003-2008 models.

A-Premium Ignition Coil Compatible with Nissan & Infiniti Vehicles – 2.5L 3.5L – Altima 2007-2018, Pathfinder 2013-2019, Maxima Murano Quest 350Z EX35 FX35 G35 Q50 QX60 M35 G25

A-Premium offers a versatile ignition coil that fits a vast range of Nissan/Infiniti VQ engines, including the later FX35 models (2009-2012). This unit meets rigorous specifications, boasting specific resistance values that guarantee dependable performance and voltage output. Its construction is centered on long-term durability, backed by an impressive guarantee. Note that this is a single coil replacement, making it suitable for diagnostic fixes or targeted replacements on the UF550 platform.

Key features that stand out:
– Broad Compatibility (UF550): Fits the 2009-2012 FX35, Q50, QX60, and many later VQ engines.
– Detailed Specifications: Precise terminal type (Blade) and resistance measurements provided.
– One-Year Unlimited-Mileage Guarantee: Focuses on dependability regardless of driving habits.
– Direct Bolt-On Mount: Simple installation process onto the valve cover.

Pros:
– Strong warranty backing for extensive use.
– Excellent fitment consistency across multiple later-model VQ applications.
– High electrical resistance ratings ensure longevity.

Cons:
– Readers must confirm their specific model year carefully, as this is the UF550 standard.

Best for: Owners of the 2009-2012 Infiniti FX35 needing a single, guaranteed replacement coil based on the newer UF550 design.

Expert Opinion: A-Premium is known for strong guarantees. This coil offers outstanding value for the later FX35 generation, matching critical electrical specs closely to OEM, ensuring stable performance across all driving conditions.

ENA Set of 6 Iridium Spark Plug and 6 Ignition Coil Pack Compatible with Nissan Infiniti Maxima Murano Pathfinder Quest Altima Q50 QX60 FX35 3.5L V6 Replacement for UF550

This all-in-one kit from ENA is a maintenance dream, providing both the 6 ignition coils and 6 high-quality Iridium spark plugs required for a full tune-up on the 2009-2012 FX35. It ensures that both critical ignition components are replaced simultaneously, guaranteeing maximum performance restoration and efficiency. Engineered to be reliable under all conditions, this UF550 kit is built for the long haul.

Key features that stand out:
– Complete Tune-Up Kit: Includes 6 coils (UF550 standard) and 6 Iridium spark plugs.
– Engineered for Reliability: Designed and manufactured to operate reliably in challenging engine environments.
– Wide Modern VQ Compatibility: Fits later models like the Q50, QX60, and 2009-2012 FX35.
– Extended 24-Month Warranty: Demonstrates confidence in product longevity.

Pros:
– Saves time and effort sourcing spark plugs separately.
– Iridium plugs offer superior performance and lifespan.
– Excellent coverage with a 2-year warranty.

Cons:
– Higher upfront cost compared to coils-only packages.

Best for: Owners of the 2009-2012 FX35 looking to perform a complete 100k-mile service refresh, replacing both coils and spark plugs simultaneously.

Expert Opinion: Pairing coils and plugs is smart preventative maintenance. This ENA kit is excellent value, utilizing Iridium plugs which greatly enhance firing efficiency and reduce the chance of misfires occurring shortly after the coil installation.

HYR Set of 6 Ignition Coil Pack and Iridium Spark Plugs Fit for 3.5L 2003-2008 Infiniti FX35 G35 M35 Nissan 350Z V6 Replaces UF401

Focusing on the 2003-2008 FX35 models (UF401), HYR provides a high-performance solution that goes beyond basic replacement. This kit includes 6 coils built with German-imported copper wire, capable of generating 35,000+ volts, alongside Iridium spark plugs. This combination guarantees more complete combustion, leading directly to increased power and better fuel economy—a noticeable upgrade from factory components.

Key features that stand out:
– High Voltage Output: Capable of generating over 35,000 volts for a powerful spark.
– German-Imported Materials: Uses premium copper wire and components for superior performance.
– Iridium Spark Plugs: Center electrodes offer fast response and high wear resistance.
– Enhanced Benefits: Designed to solve cold start problems and idle shaking issues common with failing OE coils.

Pros:
– Genuine performance upgrade focused on efficiency and power.
– High-quality materials for extended life.
– Comprehensive kit includes UF401 coils and matching Iridium plugs.

Cons:
– While high-quality, the performance boost may be marginal for daily drivers.

Best for: Enthusiasts or daily drivers of the early FX35 seeking a significant performance and efficiency upgrade during a tune-up.

Expert Opinion: This is arguably the best ignition coil for infiniti fx35 if you prioritize maximizing the VQ engine’s potential in the earlier generation. The high voltage capability ensures consistent ignition even under heavy load.

Set of 6 Ignition Coil Pack and Spark Plugs fits for Infiniti FX35 G35 M35 Nissan 350Z 2003 2004 2005 2006 2007 2008 3.5 V6 Replaces# UF401 4469

Similar to other kits for the 2003-2008 FX35, this set offers a complete replacement solution: 6 UF401 coils and 6 standard spark plugs (4469 replacement). The manufacturer guarantees that these components are built to exceed OE specifications, promising to restore engine health. The major benefit here is the balance of a full set replacement combined with a standard plug.

Key features that stand out:
– Full UF401 Kit: Includes all 6 coils and standard spark plugs (4469).
– Premium Performance Claims: Coils are designed to upgrade energy output by 15% over factory parts.
– High Durability Materials: Uses highly conductive copper wire and robust epoxy resin.
– 24-Month Warranty: A solid assurance against premature failure.

Pros:
– Highly convenient package for a complete refresh.
– Good warranty coverage (2 years).
– Direct fitment for 03-08 FX35 models.

Cons:
– Does not specify Iridium plugs, so the spark plug lifespan may be shorter than premium kits.

Best for: Budget-conscious owners of the first-generation FX35 seeking a complete, high-quality replacement kit without the premium cost associated with Iridium plugs.

Expert Opinion: For a standard preventative maintenance swap, this kit offers excellent protection and performance restoration. If your current plugs are old, this provides a major improvement in running quality.

TAUXMZ UF401 Coil pack, Set of 6 Ignition Coils Fits for 2003 2004 2005 2006 2007 2008 for Nissan 350Z/ for Infiniti FX35 G35 M35 V6 3.5 Replaces# UF401, 22448AL61C

TAUXMZ emphasizes superior build quality by utilizing premium imported materials, including German-imported Elektrisoal wire and German Huntsman epoxy. This focus on material integrity provides high electrical resistance and resistance to corrosion, ensuring that the coils maintain their performance across many miles. Tested extensively to avoid misfires, this 6-piece set is an excellent quality choice for the UF401 generation.

Key features that stand out:
– Premium Imported Materials: Ensures high durability and electrical integrity.
– OE Level Durability: Tested to perform reliably for over 15,000 miles without misfire.
– Strong Spark Output: Designed to provide a high-intensity spark from the plugs.
– Direct Replacement: Guarantees proper fitment for the 2003-2008 FX35.

Pros:
– Material quality suggests high longevity.
– Reliable performance backed by rigorous testing.
– Competitively priced for a set of six.

Cons:
– Warranty details are not as clearly specified as some competitors.

Best for: Drivers of the older FX35 prioritizing long-term durability and quality construction over maximum high-performance output.

Expert Opinion: When looking for a replacement set for the best ignition coil for infiniti fx35 that will last, the TAUXMZ emphasis on imported materials is reassuring. These coils are built tough to handle high under-hood temperatures.

1pcs Ignition Coil Compatible with Nissan Altima Maxima Murano Pathfinder Quest Infiniti G35 EX35 FX35 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Coil Pack 3.5L V6 Replaces# UF550 C1670

This single coil replacement caters primarily to the later VQ platform (UF550), covering the 2009-2012 FX35. This coil boasts an exceptional construction standard, using silicon steel, Japan-imported rubber, and German-imported varnished wire. It claims a significant 20% performance upgrade, making it suitable not just for repairs but also for incrementally boosting ignition output.

Key features that stand out:
– Extreme Quality Control: Undergoes meticulous visual, electrical performance, and high-pressure tests.
– Advanced Materials: Uses top-tier materials like silicon steel and imported rubber/wire.
– Significant Performance Upgrade: Advertised 20% boost in output over original equipment.
– 24-Month Warranty: Strong warranty for a single-unit purchase.

Pros:
– High performance gain for a single coil replacement.
– Rigorous testing procedures ensure reliability.
– Excellent 2-year warranty even for a single unit.

Cons:
– Only one unit, requiring multiple purchases for a full set.

Best for: Owners of the 2009-2012 FX35 needing to replace a single coil quickly while incorporating a performance upgrade.

Expert Opinion: The focus on high-quality componentry and strict testing makes this a premium single replacement option. If you are mixing new and old coils, this one’s enhanced output helps maintain overall engine consistency.

6PCS Ignition Coil Pack Compatible with 3.5 3.5L V6 Infiniti FX35 2003 2004 2005 2006 2007 2008, G35 2003 2004 2005 2006 2007, M35 2006-2008, Nissan 350Z 2003 2004 2005 2006 Replace UF401 22448AL61C

Offering superior performance and high-quality materials, this 6-piece set is a direct replacement for the UF401 coils (2003-2008 FX35). These coils focus on delivering a stable high-voltage output, which translates directly into improved fuel combustion and engine power. Built with durable copper windings and a robust ceramic insulator, they are designed to withstand extreme conditions.

Key features that stand out:
– Superior Performance: Enhances ignition efficiency and provides stable high-voltage output.
– High-Quality Materials: Features durable copper windings and ceramic insulator for resilience.
– Easy Installation: Designed for simple, non-professional installation, saving time and costs.
– Broad UF401 Fitment: Covers all relevant Infiniti and Nissan models requiring the UF401 standard.

Pros:
– Excellent build quality for enduring harsh conditions.
– Consistent performance improvements reported by users.
– Simple installation process.

Cons:
– Warranty information is less prominent than some competitors.

Best for: The average DIY mechanic looking for a robust, reliable, and easy-to-install set of six ignition coils for their early-model FX35.

Expert Opinion: This set hits the sweet spot between affordability and performance for the UF401 platform. The use of ceramic insulators is a notable durability benefit, especially important in a V-engine layout where temperatures can fluctuate rapidly.

AULINK UF401 Ignition Coil Pack 6PCS & 4469 Spark Plugs 3.5L For Nissan 350Z 2003-2006,for Infiniti FX35 2003-2008,G35 2003-2007,M35 2006-2008 C1439 IGC0007 2448AL61C 6734025 IGC153

AULINK provides another strong combo kit for the older FX35 (UF401 standard), including all 6 coil packs and matching standard spark plugs. This kit is built using advanced technology to be high-temperature and impact-resistant. It is manufactured in TS16949 certified facilities, indicating a high level of strict quality control and testing. This ensures not just compatibility, but functional reliability right from installation.

Key features that stand out:
– Certified Manufacturing: Produced in TS16949 certified facilities for stringent quality assurance.
– Complete Kit: 6 coils and trivalent metal plated spark plugs included.
– Robust Resistance: Designed specifically for high-temperature and impact resistance.
– 1 Year or 50,000 km Warranty: Clear mileage and time-based warranty.

Pros:
– Certified manufacturing suggests high consistency and reliability.
– Coils and plugs are pre-matched for optimal performance.
– Good warranty coverage, particularly for mileage.

Cons:
– The included spark plugs are not Iridium, limiting lifespan compared to premium kits.

Best for: FX35 owners who demand certified quality assurance and a full plug and coil replacement kit for preventative maintenance on 2003-2008 models.

Expert Opinion: Quality certification is a major factor when buying aftermarket electrical components. This set provides high confidence in fitment and performance due to the rigorous testing standards applied during manufacturing.

Comparison Short Insights

When evaluating the best ignition coil for infiniti fx35, the most critical factor is the model year, as the VQ engine used two different coil specifications. The 2003-2008 FX35 requires the UF401 standard, while the 2009-2012 FX35 uses the UF550 standard. Choosing the wrong set will result in fitment and performance issues.

For the early FX35 (UF401), the most compelling value lies in the kits that include spark plugs, like the HYR Set or the Set of 6 Ignition Coil Pack and Spark Plugs (UF401). The HYR set edges out with Iridium plugs and higher voltage output claims, making it the better performance choice. Conversely, for reliability on the UF401 platform, the TAUXMZ UF401 Coil pack emphasized material quality.

If you drive a later FX35 (UF550), the clear front-runner for a complete refresh is the ENA Set of 6 Iridium Spark Plug and 6 Ignition Coil Pack (UF550), offering the benefit of long-life Iridium plugs paired with the correct coils. If you only need a single replacement for UF550, the 1pcs Ignition Coil (UF550) offers enhanced performance and an excellent 2-year warranty.

Remember, if you plan to keep your FX35 for the long term, investing in sets with extended warranties (24 months) and premium materials (like German wire or ceramic insulators) is highly recommended for stable, long-lasting ignition performance.

Final Verdict

Choosing the right ignition coil often comes down to balancing price, the level of performance enhancement you seek, and whether you need a full tune-up kit. Based on our detailed review of the best ignition coil for infiniti fx35, here are our top recommendations across different needs:

Top Pick for Maximum Performance (UF401)

The HYR Set of 6 Ignition Coil Pack and Iridium Spark Plugs Fit for 3.5L 2003-2008 Infiniti FX35 takes the crown. The combination of high-voltage coils (35,000+ volts) and premium Iridium plugs ensures the most efficient spark and noticeable performance improvements for the early FX35 VQ engine.

Best Value & Convenience (UF550)

For owners of the later 2009-2012 FX35, the ENA Set of 6 Iridium Spark Plug and 6 Ignition Coil Pack Compatible (UF550) is the smartest purchase. It provides the correct UF550 coils, plus long-lasting Iridium spark plugs, minimizing future maintenance needs and offering excellent component synergy.

Best Budget Replacement Set (UF401)

If you need a reliable, cost-effective six-pack replacement to fix misfires without demanding a major performance upgrade, the 6PCS Ignition Coil Pack Compatible with 3.5 3.5L V6 Infiniti FX35 2003-2008 offers superior construction (ceramic insulator) and superior performance over basic factory specs, ensuring quick restoration of drivability.

Best Ignition Coil For Infiniti FX35 FAQ

Q: How do I know if I need a new best ignition coil for infiniti fx35?

A: Common symptoms of a failing ignition coil in your FX35 include engine misfires (often causing the Check Engine Light, or CEL, to flash), rough idling, decreased acceleration or hesitation when stepping on the gas, and poor fuel economy. If your CEL is flashing, this typically indicates a severe misfire that requires immediate attention. You can also use an OBD-II scanner to read the specific P030X codes (P0301, P0302, etc.) to pinpoint the exact cylinder failure.

Q: Do I need to replace all six coil packs at once?

A: While you can certainly replace a single faulty coil to fix an immediate problem, most experts recommend replacing all six coil packs and spark plugs simultaneously, especially on high-mileage VQ35DE engines. Coils tend to degrade around the same rate, and replacing them all at once ensures consistent performance, preventing another coil failure shortly after the first replacement.

Q: What is the difference between UF401 and UF550 coils? Which one does my FX35 use?

A: The difference is primarily based on your Infiniti FX35 model year. The UF401 specification generally applies to the first generation (2003 to 2008 FX35 models). The UF550 specification is used for the second generation (2009 to 2012 FX35 models). Always check your vehicle’s specific year and VIN compatibility, especially when dealing with the transition years, to ensure you select the correct fitment.

Q: Is it difficult to install ignition coils on the VQ35DE engine?

A: Installing the ignition coil packs on the FX35’s VQ35DE engine is generally considered a straightforward DIY job. The coils are located directly on top of the spark plugs, beneath the plastic engine cover. You will need basic tools (socket wrench, extensions). However, on some VQ setups, accessing the rear coils can be tight, but it typically doesn’t require removing the intake manifold like some other V6 engines.

Q: Are performance coils (high-voltage output) worth the extra money?

A: For most daily drivers, a high-quality OEM-spec replacement coil provides sufficient performance and reliability. However, if you are an enthusiast, frequently drive aggressively, or have made minor engine modifications (like a cold air intake), a performance-oriented coil (like those offering 15-20% more energy) can be beneficial. They ensure a stronger, more complete burn, which can marginally improve throttle response and efficiency.

Q: Should I buy a coil set that includes spark plugs?

A: Yes, purchasing a kit that includes spark plugs alongside the best ignition coil for infiniti fx35 is highly recommended for two reasons: convenience and performance. When coils fail, the spark plugs are often aged and prone to wear. Replacing both ensures the ignition system is entirely refreshed, maximizing engine power and efficiency right away. Kits featuring Iridium spark plugs offer the longest service life.