Ignition Coil Pack UF349 and Iridium Spark Plug 6376 Set - Reliable

In this review the tester looks at the BDFHYK ignition coil pack UF349 paired with iridium spark plug 6376, a combined replacement kit aimed at Nissan and INFINITI owners who need to restore starting reliability and engine smoothness. The bottom line: this set is most suitable for drivers whose vehicles match the listed fitment and who want an affordable, ready-made coil and plug set that uses higher-grade materials like iridium electrodes and varnished wire construction. It delivers clear value for routine replacement cycles and vehicles that have exceeded long service intervals.

Key Features

• Direct fit compatibility: Designed to replace UF349 ignition coils and 6376 spark plugs on many Nissan and INFINITI models so installation is straightforward when OE numbers match.
• Durable coil construction: Coil packs use silicon steel, Japan-imported rubber, and Germany-imported varnished wire to improve longevity under heat and vibration.
• Iridium spark plugs: The plugs feature an iridium electrode and engineered ceramic to promote quicker starts and consistent acceleration after installation.
• Set of six: Supplied as a full set to service multiple cylinders at once, which simplifies maintenance and parts matching.
• OE cross-reference: The listing includes many equivalent OE numbers so buyers can verify fitment before ordering.

Who It's For

This kit is best for owners of Nissan Altima, Maxima, Xterra, Pathfinder, Frontier, Murano, Quest and compatible INFINITI I35 and QX4 models from the early 2000s who need a full ignition coil and spark plug refresh. It suits DIY mechanics and independent shops that prefer a bundled replacement to swap multiple coils and plugs at once.

It is less suitable for owners whose vehicles require different OE parts or for those seeking a branded OEM part with extended warranty support; always check the OE numbers against your vehicle before buying to ensure correct fitment.

Pros & Cons

Pros

• Good overall fit for the listed Nissan and INFINITI models, making installation easier.
• Quality-focused materials in coils and iridium plugs aim to extend service life and restore engine responsiveness.
• Cost-effective set that replaces multiple components at once, offering clear value for money.

Cons

• Engine performance reports are mixed for some users, with isolated cases of misfiring after a short period; buyers should verify fitment and inspect installation.

Specifications

Our Verdict

The BDFHYK UF349 coil and 6376 iridium plug set is a practical, value-oriented replacement for owners of compatible Nissan and INFINITI models who need a complete ignition refresh. It uses upgraded materials and comes as a convenient set of six, making it a sensible choice for routine maintenance, though buyers should confirm OE compatibility and be aware of mixed reports on long-term engine performance.

Frequently Asked Questions

Will this set fit my Nissan?
Check the listed OE numbers and model years against your vehicle; fitment varies by engine and year so OE verification is necessary.

Are the spark plugs iridium?
Yes, the plugs use an iridium electrode designed for quicker starts and improved durability.

Should I replace all coils and plugs at once?
For vehicles past long service intervals or showing symptoms like rough idling or slow acceleration, replacing the whole set is recommended to restore consistent performance.