Marsram Ignition Coil Pack & 6 Double‑Iridium Spark Plugs UF349 for 2003–2007 Nissan Murano 3.5L Direct‑Fit, Heat‑Resistant

Marsram Ignition Coil Pack UF349 bundled with six double‑iridium spark plugs — a direct-fit ignition kit designed to restore reliable spark and smooth performance for many 3.5L and 4.0L Nissan/Infiniti engines, including 2003–2007 Murano models.

This complete ignition set pairs Marsram replacement coil packs built from heat-resistant epoxy and high-strength engineering plastics with high-performance double‑iridium spark plugs. The coils use tightly wound, high-conductivity copper windings for fast, consistent secondary voltage, while the plugs’ advanced center and ground electrodes are engineered to resist corrosion and preserve gap stability over time. The kit ships as six coils and six plugs and includes compatibility for a wide range of Nissan and Infiniti V6 applications — check fitment before ordering.

Will this kit fit my Nissan Murano or other V6 models?

If your vehicle is listed among the supported years and trims, the Marsram UF349 coil pack and plug kit is designed as a direct replacement with matching electrical and mounting points. Compatibility covers many Murano S/SE/SL model years plus a long list of Nissan and Infiniti V6 vehicles.

• Confirmed compatibility: 2003–2007 Murano SE/SL and 2005–2007 Murano S (3.5L V6).
• Also fits multiple Maxima, Altima, Pathfinder, Xterra, Quest, Frontier and Infiniti I35/QX4 V6 applications.
• Replaces common OEM numbers such as UF349, 22448‑8J111, 224338J11C and related part codes.
• Always verify your specific engine code and build date against seller fitment before purchase.

How do these coils and spark plugs improve engine performance?

By restoring reliable ignition voltage and preserving a consistent spark gap, the kit helps engines fire more completely and run smoother under load. Improved combustion efficiency can lead to steadier idle, more responsive throttle feel and fewer misfires compared with worn coils or fouled plugs.

• Coils: epoxy and reinforced plastic housings resist heat and deformation for longer service life.
• Copper windings provide rapid current transfer for consistent high-voltage output.
• Double‑iridium plugs deliver longer electrode life and smaller, stable gap for efficient combustion.
• Reduced spark gap growth lowers the chance of misfires and rough running over time.

Is installation straightforward and what should I expect?

These components meet or surpass original-equipment dimensions and electrical specifications, so installation follows standard ignition coil and plug replacement procedures. Technically comfortable DIYers can swap coils and plugs with common hand tools, but a service manual or torque specs are recommended for best results.

• Kit includes six coils and six spark plugs — one per cylinder for V6 engines.
• Follow OEM torque values for plug and coil fasteners to avoid damage.
• Use dielectric grease on coil boots if desired to ease future removal and prevent moisture intrusion.
• If unfamiliar with ignition work, consider a professional install to ensure correct gap and connections.

What warranty and support come with the kit?

Marsram backs this aftermarket ignition kit with a one‑year warranty and responsive customer support for product issues. The company emphasizes factory-level manufacturing experience and testing to validate material strength and electrical performance.

• One-year limited warranty covering defects in materials and workmanship.
• Responsive support: contact Marsram promptly for any issues or questions.
• Packaged as a complete six‑cylinder replacement to ensure matched components.

Who is this for: The Marsram UF349 ignition coil and iridium plug kit is aimed at owners and mechanics who need a full ignition refresh for Nissan or Infiniti V6 engines — especially 2003–2007 Murano drivers experiencing misfires, uneven idle, or diminished throttle response. It's also suitable for fleet maintenance shops and DIY enthusiasts who prefer a matched coil-and-plug set with aftermarket warranty coverage. Verify vehicle fitment before purchase to ensure correct electrical and mechanical compatibility.