Reilauto Ignition Coil Pack and Iridium Spark Plug Kit for Nissan/Infiniti — Set of 4, Direct-Fit UF549 9029, Improved Durability

Reilauto's set of four ignition coils and iridium spark plugs is a direct-fit replacement kit designed to restore dependable ignition and efficient combustion for many 2007–2019 Nissan and Infiniti engines.

This kit combines four high-quality ignition coil packs and four iridium-tipped spark plugs engineered to match OEM fit and function. Engineered for straightforward swap-in installation, the components meet or exceed factory specifications to deliver consistent spark energy, improved electrode life, and reliable operation across compatible models and displacements from 1.6L to 5.6L.

Will these ignition coils and plugs fit my Nissan or Infiniti?

Yes — the kit was designed to replace original parts on a wide range of Nissan and Infiniti models and engine sizes listed in the compatibility spec. It includes cross-reference numbers (UF-549, 9029 and others) to help you confirm fitment before purchasing.

• Fits many Nissan models: Altima, Sentra, Versa, Rogue, Cube, X-Trail, Tiida, March, NP300/Frontier, Urvan, Pathfinder.
• Compatible Infiniti models include Q70, Q70L, QX60, QX70, FX50, M56 for specified years.
• Cross-reference part numbers provided for compatibility checks and dealer confirmation.

How do these parts affect engine performance and reliability?

Replacing worn coils and spark plugs restores reliable ignition timing and stronger, more consistent sparks, which helps stabilize idle, reduce misfires, and maintain fuel combustion efficiency. The iridium tips extend service life compared with standard plugs, while upgraded insulators and materials on the coils support voltage stability under heat.

• Iridium spark plugs provide longer-lasting electrodes and steady spark transfer.
• Coils feature premium insulation to resist heat and electrical leakage.
• Together they reduce misfires and promote smoother running between maintenance intervals.

Is installation difficult and what tools do I need?

Installation is routine for anyone familiar with basic engine maintenance and spark-plug or coil replacement: unplug the old coils, remove the plugs, install new plugs with proper gap and torque, then fit the new coils. A torque wrench, spark-plug socket, ratchet, and dielectric grease are recommended to ensure correct seating and long service life.

• Typical tools: torque wrench, spark-plug socket, ratchet, extension, anti-seize or dielectric grease.
• Follow manufacturer torque specs and gap recommendations; do not overtighten plugs.
• Quick checks: inspect plug wells, replace hoses or boots if cracked, and clear any debris before installation.

What quality assurances and support come with this Reilauto kit?

Reilauto manufactures these parts to meet or exceed OEM standards; the kit is precision-made to minimize fitment issues and to reduce the chance of installation modifications. A one-year unlimited-mileage guarantee covers defects, and customer support is available to help with fitment or installation questions.

• Built to OEM-equivalent tolerances and material standards for dependable fit.
• One-year unlimited-mileage warranty from Reilauto for peace of mind.
• Customer support available for troubleshooting and part verification.

Who is this for: This set is aimed at DIY enthusiasts, independent mechanics, and fleet owners who need a reliable, OEM-form replacement ignition coil and iridium spark plug kit for mid-2000s to late-2010s Nissan and Infiniti vehicles. Choose this kit if you want a complete four-cylinder replacement pack that simplifies maintenance, restores ignition reliability, and uses durable iridium plugs and robust coils designed for on-road durability.