NPAUTO Ignition Coil and Spark Plug Kit for 3.5L V6 Nissan & Infiniti — 6-Pack UF550, Pre-Gapped Plugs

Complete replacement kit of six NPAUTO UF550 ignition coils and six pre-gapped spark plugs engineered for 3.5L V6 Nissan and Infiniti engines from late-2000s through 2020.

This all-in-one ignition kit bundles six UF550 ignition coils with six pre-gapped spark plugs to restore reliable spark, smoother idle, and consistent combustion in compatible Nissan and Infiniti 3.5L V6 vehicles. Built to meet or exceed OEM specifications, the components are supplied as a matched set so you can replace all cylinders at once and avoid mismatched wear or performance gaps.

Which models and years does this NPAUTO kit fit?

This kit is designed for a broad range of Nissan and Infiniti vehicles with the 3.5L V6 engine. Always verify the compatibility chart for your exact VIN and engine code before purchasing.

• Nissan: Maxima (2009–2014, 2016–2020), Altima (2007–2018), Murano (2009–2020), Pathfinder (2013–2020), Quest (2011–2017), 350Z (2007–2009)
• Infiniti: Q50/Q70 (2014–2017 depending on model), QX60 (2014–2020), M35/M35h (2009–2013), EX35 (2008–2012), FX35 (2009–2012), G35/G25 (2007–2008, 2011–2012)
• Compatible part numbers: UF550, UF-550, 22448JA10A, 22448ZE00A, 22448JA10C, 22448JA11C, 22448JA12D, GN10244, C-750, C1670

How will replacing all six coils and plugs at once help my car?

Replacing the entire set prevents uneven wear across cylinders and reduces the chance of recurring misfires caused by a single weak component. A matched replacement set restores consistent spark timing and combustion efficiency.

• Solves intermittent engine misfires and rough idling
• Improves starting reliability and throttle response
• Helps maintain fuel economy by ensuring balanced combustion
• Pre-gapped plugs save installation time and reduce guesswork

What are the construction and quality highlights of the NPAUTO UF550 kit?

These coils and plugs are manufactured to high-quality standards using premium materials intended to meet or exceed OEM dimensions and performance. The coils deliver stable high-voltage output and the plugs are pre-gapped for correct electrode spacing.

• Precision-molded coil housing for secure fit and heat resistance
• Robust internal windings and insulation for reliable spark delivery
• Pre-gapped spark plugs matched to OEM gap specifications
• Packaged as a 6-coil and 6-plug set for full-bank replacement

How difficult is installation and what should I check before buying?

Installation is a medium-difficulty DIY or technician task: coils and spark plugs are accessible on most V6 engines but may require basic tools and care to avoid cross-threading plugs. Confirm the kit's compatibility with your vehicle's engine code and check torque specifications during installation.

• Inspect compatibility chart and match part numbers before purchase
• Use a torque wrench and proper socket to avoid damaging threads
• Replace all six coils/plugs simultaneously for best results
• Consider dielectric grease on coil boots for moisture prevention

Who is this for: This NPAUTO UF550 6-coil and 6-plug set is aimed at owners and mechanics of Nissan and Infiniti vehicles with the 3.5L V6 who want a complete, OEM-grade ignition refresh. It's suitable for those troubleshooting misfires, poor idle, weak starts, or anyone performing scheduled ignition maintenance and preferring a matched, pre-gapped set to ensure uniform performance across all cylinders.