Ignition Coil Pack and Spark Plugs Set for Nissan 3.5L V6 - Reliable

In this review the IgnitionDoctor combo of six ignition coil packs and spark plugs is judged for owners of Nissan, Infiniti and Suzuki vehicles that use the 3.5L or 4.0L V6 engines. The bottom line: this kit is for DIYers and independent shops who want an OEM-compatible replacement that can restore smoother idling and reduce hard starts. The set replaces several factory part numbers and comes pre-gapped, so installation is straightforward for anyone comfortable with basic engine work and looking for a cost-effective performance refresh.

Key Features

• Wide Compatibility: Designed to fit many Nissan, Infiniti and Suzuki V6 models so buyers can cover multiple vehicles with one part number list.
• Direct Fit Design: Coils and plugs are made for OEM compatibility, which simplifies installation and reduces the chance of fitment issues.
• Improved Engine Response: The combination aims to reduce long crank times and hard starts, producing smoother idling and more consistent power delivery.
• Pre-gapped Spark Plugs: Plugs arrive pre-gapped to meet or exceed factory specs, saving time during the tune-up and reducing setup errors.
• Durability Focus: Built with premium materials for long-term use and consistent performance under typical driving conditions.
• One-Year Warranty: Includes a 1-year warranty and seller support for peace of mind after purchase.

Who It's For

This set is best for owners of compatible models such as Nissan Altima, Maxima, Murano, Pathfinder, Xterra, Frontier, and Infiniti I35 or QX4 who need a full ignition refresh. It suits DIY mechanics who prefer to replace all six coils and plugs at once to restore firing balance and fuel economy.

It is also appropriate for independent shops performing routine maintenance or troubleshooting misfires. Those who need exact OE branded parts for warranty preservation or who require verified long-term field reliability data may prefer factory original parts instead.

Pros & Cons

Pros

• Restores smoother idle and reduces hard starting in many V6 Nissan and Infiniti engines.
• Pre-gapped spark plugs and direct-fit coils make installation faster and simpler.
• Replaces multiple OE part numbers, simplifying part sourcing across model years.
• Includes a 1-year warranty and seller support for buyer confidence.

Cons

• Some customers reported occasional wrong spark plugs or mixed durability results, so inspect parts on arrival.

Specifications

Brand	IGNITIONDOCTOR
Fitment	Nissan, Infiniti, Suzuki V6 models (3.5L and 4.0L as listed)
Contains	6 ignition coil packs and 6 spark plugs
Replaces	UF349, C1736, IC479, 5C1403, 224018H515, C1406 and related numbers
Spark Plug Types	NGK and equivalent part numbers referenced
Warranty	1-year limited warranty

Our Verdict

The IgnitionDoctor coil and spark plug set is a practical, value-oriented choice for owners of compatible Nissan and Infiniti V6 vehicles who need to restore reliable ignition and smoother idling. It delivers direct-fit convenience and a sensible warranty, making it a good buy for DIY maintenance or shop use, though buyers should verify the received plug types on arrival due to occasional fulfillment errors.

Frequently Asked Questions

Will these parts fit my Altima 3.5L?
They are listed for Altima 2002-2006 3.5L V6; confirm with the compatibility tool or vehicle specifics before ordering.

Are the plugs pre-gapped?
Yes, the spark plugs in the kit are pre-gapped to meet or exceed OEM specifications.

What if a part is defective?
The set includes a 1-year warranty; contact the seller for support and replacement options.