X4XZ Ignition Coil & Iridium Spark Plug Kit 4-Pack for Nissan 2.5L (2002–2006) — Direct-Fit, Double‑Iridium

Complete 4-pack ignition coil and double‑iridium spark plug kit engineered to restore reliable spark and smoother running for compatible 2002–2006 Nissan 2.5L engines.

If your Nissan Altima, Sentra or X‑Trail with the 2.5L L4 engine is showing misfires, rough idling or reduced power, this X4XZ kit provides direct-fit ignition coils (UF350) and durable double‑iridium plugs (4505) designed to match or improve OEM performance. Each coil is built with thermal‑resistant connectors and internal noise suppression, while the iridium plugs deliver a long service life and consistent ignition. The kit contains four coils and four plugs — enough to service a full cylinder bank — and comes with OE cross-reference numbers for easy verification before purchase.

Will these parts fit my Nissan model and year?

These components are compatible with a range of Nissan models that use the 2.5L L4 engine. Always confirm fitment against the vehicle’s part numbers or the images provided on the listing before ordering.

• Compatible models: 2002–2006 Nissan Altima L4 2.5L
• Also fits: 2002–2008 Nissan Sentra L4 2.5L and 2002–2013 Nissan X‑Trail L4 2.5L (select years)
• OE/replace numbers included for verification: UF350, 4505, 5C1395, C1398, 1788319, 22448‑8H310, GN10219

How do these ignition coils and iridium plugs improve engine performance?

The coils ensure stable high‑voltage delivery to the plugs while the double‑iridium electrodes provide a reliable, long‑lasting spark. Together they reduce the risk of misfires, enable smoother idling and help the engine run more consistently under load.

• Ignition coils: stainless springs and ferrite suppressor to limit radio interference
• Thermoplastic connectors resist heat cracking and maintain secure electrical connection
• Double‑iridium plugs: extended life expectancy and consistent spark over time

What’s included and how hard is installation?

The kit ships with four ignition coil packs and four double‑iridium spark plugs — everything needed for a four‑cylinder replacement except basic hand tools. No printed manual is included, but installation is straightforward for anyone familiar with spark plug and coil replacement; professional installation is recommended if you lack experience.

• Package contents: Ignition Coil Packs x4, Double Iridium Spark Plug x4
• Tools commonly required: ratchet, spark plug socket, torque wrench, dielectric grease
• Tip: compare OE part numbers before installation for exact fitment assurance

What durability and support can I expect from this kit?

The plugs are designed for long life — with iridium electrodes that maintain consistent spark characteristics — and the coils use materials chosen for thermal and electrical reliability. X4XZ backs the kit with a one‑year product warranty and customer support to address installation or quality questions.

• Plug longevity: iridium center and ground electrodes for extended service intervals
• Coil construction: corrosion‑resistant components and internal RFI suppression
• After‑sales: 24‑hour customer service and a one‑year warranty from X4XZ

Who is this for: Drivers and DIY mechanics who need a full ignition refresh on Nissan 2.5L L4 engines — especially owners of 2002–2006 Altima models or compatible Sentra and X‑Trail years — seeking OE‑matched parts with longer‑lasting iridium plugs and robust coil construction. If you want parts that are designed to fit directly, restore reliable ignition, and reduce recurring maintenance, this four‑cylinder kit offers a practical, value‑focused solution.