Ignition Coil UF401 and NGK4469 Spark Plug Set for Nissan Infiniti

In this review the Ignition Coil UF401 and Spark Plug NGK4469 set is evaluated for owners of 3.5L and 4.0L V6 Nissan and Infiniti vehicles who need a direct replacement to restore ignition performance. The bottom line: this kit is for drivers wanting a practical, affordable swap that often cures misfire, rough idle and loss of power; the reviewer found the coils are built to a solid OE level and the iridium spark plugs deliver quick starts and improved throttle response after installation.

Key Features

• Compatibility: Direct replacement for many Nissan and Infiniti 3.5L V6 models, making part sourcing straightforward for the specified years.
• Durable construction: Coil packs use silicon steel, Japan-imported rubber and Germany-imported varnished wire for longer service life compared with basic aftermarket coils.
• Premium spark plugs: NGK4469-style plugs use an iridium electrode and engineered ceramic to improve cold-start performance and throttle response.
• Easy installation: Coils are located on both sides of the engine bay and are designed to be installed in minutes with common hand tools.
• OE cross references: Supplied references include UF401 and several OE numbers so buyers can confirm fitment before ordering.

Who It's For

This kit is best for owners of 2003-2008 Infiniti FX35, 2003-2007 G35, 2006-2008 M35, and 2003-2006 Nissan 350Z and similar 3.5L V6 platforms who want a full set replacement to address misfires or weak starts. Mechanics and DIYers who prefer a matched coil-and-plug set will appreciate the convenience and the OE-level materials noted in the construction.

It is not ideal for owners of nonlisted engines or later model years, and anyone unsure of exact OE numbers should confirm fitment first; a handful of buyers report occasional electrical plug fit issues, so those wanting perfect factory connectors every time may prefer purchasing single coils to verify fit before replacing all six.

Pros & Cons

Pros

• Restores lost power and reduces misfires when matched to the correct engine applications.
• High quality coil materials and iridium spark plugs offer potentially longer service life than economy parts.
• Easy to install on both sides of the engine bay, enabling quick DIY replacement.

Cons

• Some users report mixed results on plug gap procedure and occasional fitment issues with the electrical connector, so careful pre-checking is recommended.

Specifications

Our Verdict

For owners of the listed Nissan and Infiniti V6 models this coil and spark plug set is a cost-effective way to cure common ignition issues and restore performance. The build materials and iridium plugs make it good value for routine replacement, but confirm OE compatibility and inspect electrical connectors during installation to avoid fit problems.

Frequently Asked Questions

Will these fit my V6 Nissan or Infiniti?
Check the listed model years and OE cross references; they are intended for the specified 3.5L and 4.0L V6 vehicles.

How difficult is installation?
Coils are accessible in the engine bay and most users can replace them with basic hand tools in minutes per coil.

How long do they last?
Manufacturer notes and testing indicate OE level durability and consistent operation beyond typical short-term alternatives, with many units working well past 15,000 miles.