NPAUTO Ignition Coil & Spark Plug Kit for V6 4.0L — 6-Coil 6-Plug OE-Fit Pre-Gapped

NPAUTO ignition coil pack and pre-gapped spark plug set—six coils and six spark plugs engineered to replace failed ignition components on compatible Nissan and Infiniti V6 engines.

This complete ignition set is built for V6 4.0L Nissan applications and a range of related V6 engines, delivering a direct OE-style replacement that simplifies repairs. The package includes six ignition coils and six pre-gapped spark plugs, matched to original fitment numbers and produced to meet or exceed OEM specifications. Before purchasing, verify compatibility with your vehicle's year and engine code to ensure correct installation.

Which vehicles are supported by this NPAUTO ignition coil and spark plug kit?

The kit fits a wide selection of Nissan, Infiniti, Suzuki, and Nissan NV commercial models across specific years and engine sizes. It’s intended for both the 4.0L V6 and several 3.5L V6 applications listed in the compatibility details. Always cross-check the supplied part numbers and the listing’s compatibility chart with your VIN or engine code for exact match confirmation.

• 4.0L V6: Nissan Frontier (2005–2019), Xterra (2005–2015), Pathfinder (2005–2012), NV1500/NV2500/NV3500 (2012–2019), Suzuki Equator (2009–2011)
• 3.5L V6: Nissan Altima, Maxima, Murano, Quest and select Infiniti models (various 2002–2009 years)
• Included part numbers: UF349, 5C1403, 224338J115, 224488J111, 3340082Z00, UF-349 and cross-references

How does replacing coils and plugs with this set help my engine?

Worn or faulty ignition coils and spark plugs can cause misfires, rough idle, decreased power, and poorer fuel economy. Replacing both coils and plugs together restores consistent spark delivery and combustion timing across all cylinders. This full-set approach prevents mismatched component performance and simplifies a single-service repair.

• Restores even firing across the V6 engine for smoother idle and acceleration
• Reduces misfire-caused drivability issues and diagnostic repeat visits
• Pre-gapped spark plugs save installation time and match coil output

What comes in the box and what should I check before installing?

The box contains six ignition coils and six pre-gapped spark plugs—enough for a full-bank replacement on V6 engines. Inspect each coil and plug for shipping damage and compare the part numbers to your original equipment. Also have basic hand tools and a torque wrench ready for proper mounting and connector seating.

• 6 x ignition coils and 6 x pre-gapped spark plugs included
• Confirm part numbers and vehicle compatibility before installation
• Recommended: replace in clean environment and torque to factory specs

Can I install these parts myself, or should I visit a shop?

Many mechanically-inclined owners can perform the swap with common tools; however, professional installation is recommended if you lack experience with ignition systems. Properly seating connectors and torquing fasteners prevents future failures and electrical issues. If a check engine light remains after installation, a diagnostic scan will identify lingering codes or related faults.

• DIY-friendly with basic mechanical skills and a service manual
• Seek professional help if unsure about ignition wiring or torque specs
• Clear and recheck engine codes after replacement for validation

Who is this for: This NPAUTO coil pack and spark plug kit is suited for owners and technicians working on Nissan V6 vehicles who want a full-bank replacement that follows OEM fitment and part-number cross-references. It’s a practical choice for restoring reliable ignition performance on compatible Frontier, Xterra, Pathfinder, NV series, Altima, Maxima, Murano, Quest, Infiniti, and Suzuki Equator models listed in the compatibility details.