UF549 Ignition Coil Packs & 9029 Double Iridium Spark Plug Compatible

In this review of the UF549 Ignition Coil Packs paired with 9029 Double Iridium Spark Plugs, the bottom line is straightforward: this kit is for Nissan and Infiniti owners who need an affordable, direct replacement that restores reliable ignition performance. The reviewer found the set best suited to models listed in the fitment notes, and the single biggest reason to buy is the combination of an OE-style coil design with long-life double iridium plugs that together address misfires, rough idle, and reduced fuel economy.

Key Features

• Direct fit compatibility: Designed to match OE form and fit for many Nissan and Infiniti models so installation is typically fast and straightforward.
• Double iridium spark plugs: Plugs use a double iridium tip for a longer working life and consistent, stable spark over extended mileage.
• UF549 coil design: Coils include a stainless-steel spring and internal ferrite noise suppressor to reduce radiofrequency interference and improve reliability.
• Improved cold-start and idle: The matched coil and plug set helps restore cold-start performance and smooth engine idle when original parts are failing.
• Materials and durability: Thermoplastic coil connectors resist heat-related fractures and the plug construction is rated for long service life.

Who It's For

The kit is aimed at owners of compatible Nissan and Infiniti models - including Altima, Rogue, Sentra, Versa, Cube, Pathfinder, QX60 and several others - who need a complete four-cylinder ignition refresh without sourcing separate parts. It suits DIY mechanics and home installers who want a near-OE replacement that often fits without modification.

Those who should look elsewhere are owners of engines or years not listed in the fitment notes, or buyers who require a dealer-branded warranty and official dealership service; this aftermarket kit offers a three-year product service and 24-hour support but is not a factory-branded part.

Pros & Cons

Pros

• Good functional replacement for OE coils and plugs, resolving misfires and rough idle in tested vehicles.
• Double iridium plugs promise a longer service life and stable spark consistency.
• Coil pack design addresses noise suppression and heat resilience for durable operation.

Cons

• Fitment requires careful verification against the long vehicle list; not every model year or engine will be covered.
• Installation instructions are not included, so a basic mechanical skill level is needed or reference to a manual.

Specifications

Brand	X4XZ
Included parts	Ignition Coil Packs x4, Double Iridium Spark Plugs x4
OE Numbers	UF549 and 9029
Replacement part numbers	C1696, 5C1753, 22448ED000 and others listed by manufacturer
Compatible vehicles	Selected Nissan and Infiniti models 2007-2019 (see fitment list)
Plug lifespan	Rated for long service life (designed for ~100,004 km equivalent)
Support	24-hour customer service and 3 year product service

Our Verdict

The UF549 coil and 9029 double iridium spark plug kit is a practical, cost-effective repair option for compatible Nissan and Infiniti vehicles. It restores ignition reliability, often improves fuel efficiency, and delivers an OE-style fit and finish for DIY installers who verify fitment. It represents good value for drivers who need dependable replacements without dealer pricing.

Frequently Asked Questions

Will these coils and plugs fit my vehicle?
Check the detailed fitment list against your model year and engine; compatibility spans many Nissan and Infiniti models from 2007 to 2019 but must be confirmed.

Are installation instructions included?
The kit does not include a printed manual, so basic mechanical experience or a service manual is recommended for proper installation.

What warranty or support is offered?
Manufacturer support includes 24-hour customer service and a three-year product service for quality or installation concerns.