Ignition Coil Pack UF375 & Iridium Spark Plugs 6509 Set of 4

In this review the ignition coil pack UF375 paired with iridium spark plugs 6509 is evaluated for owners of select GM V6 vehicles who need a dependable tune-up kit. The bottom line: this kit is best for drivers of Buick, Cadillac, Chevy, GMC and Saturn models listed in the fitment who want an affordable way to restore ignition performance and reduce misfires. The combination targets quick starts, smoother acceleration and longer spark life thanks to iridium electrodes and durable coil construction; buyers should still verify OE numbers and exact fit before purchase.

Key Features

• Vehicle fitment: Directly compatible with a range of Buick, Cadillac, Chevy, GMC and Saturn V6 models from the mid 2000s, making it a practical replacement option for those specific cars.
• Ignition coil construction: Coils use silicon steel, Japan-imported rubber and varnished wire to improve durability and reduce internal failure risk under heat and vibration.
• Iridium spark plugs: Iridium electrode plugs are designed for longer service life, faster starts and more consistent combustion compared with standard plugs.
• OE cross-check guidance: The listing includes OE numbers to verify compatibility, helping prevent incorrect purchases when matched to the vehicle parts list.
• After-sales support: Lifetime after sales service is offered, giving buyers a point of contact if they encounter problems after installation.
• Improved driveability: Reported benefits include reduced misfires and smoother acceleration, which can restore a feeling of a newer-running engine.

Who It's For

This kit is ideal for owners of Buick Allure, Enclave, LaCrosse, Rendezvous; Cadillac CTS, SRX, STS; Chevy Traverse; GMC Acadia; and Saturn Outlook from the model years listed who are experiencing rough idle, misfires, slow acceleration or increased fuel use and who want a cost-effective replacement. It is also suitable for DIYers comfortable matching OE numbers and doing a straightforward ignition service.

It is not for drivers with vehicles outside the stated fitment or for those who need OEM-branded parts guaranteed by a dealer warranty. Also, if corrosion or chronic electronic faults are present, a diagnostic check and possible replacement of additional components may be required rather than just coils and plugs.

Pros & Cons

Pros

• Improves engine performance and reduces misfires for many users when correctly fitted.
• Iridium plugs offer long service life and quicker starts compared with conventional plugs.
• Coils are built from durable materials intended to withstand heat and vibration.
• Lifetime after-sales support provides reassurance if issues arise post-installation.

Cons

• Fit is crucial: some customers reported fitment mismatches, so OE verification is necessary before buying.
• There are occasional reports of corrosion-related failures on older vehicles, indicating environmental longevity may vary.

Specifications

Kit contents	Ignition coil UF375 and spark plug 6509, sets of 4
Compatible engines	2.8L and 3.6L V6 (listed GM models)
Ignition coil materials	Silicon steel core, Japan rubber, varnished wire
Spark plug electrode	Iridium
OE references	UF375 and 6509 cross numbers provided for verification
Support	Lifetime after-sales service

Our Verdict

For owners of the specified GM V6 models who need to address misfires, rough idle or sluggish throttle response, this UF375 coil and 6509 iridium plug kit is a practical, value-oriented repair option. It pairs durable coil construction with long-life iridium plugs and comes with support after purchase, but buyers must confirm OE compatibility and be aware that corrosion can affect longevity on older cars.

Frequently Asked Questions

Will these coils and plugs fit my car?
They fit the specific Buick, Cadillac, Chevy, GMC and Saturn models and years listed; always cross-check the OE numbers provided with your vehicle before buying.

Do the spark plugs need replacement sooner than coils?
Iridium plugs typically last longer than standard plugs, but replacement intervals depend on driving conditions and manufacturer guidance; coils may fail from heat or corrosion earlier in some cases.

What if a part fails after installation?
The seller provides lifetime after-sales service, so contact them with the issue and OE references to arrange support or replacement.