DG549 UF646 Ignition Coil Packs & NGK Iridium Spark Plugs Set of 6

In this review of the DG549 UF646 ignition coil packs paired with NGK iridium spark plugs, the conclusion is simple: this set is for owners of Ecoboost 3.5L V6 Ford engines who need a straightforward, cost-effective way to restore spark and drivability. The reviewer found the kit to provide a direct replacement fit, improved ignition performance, and a predictable result when replacing worn coils and plugs. For anyone wanting to avoid escalation into more costly repairs, this combination delivers a practical, do-it-yourself solution.

Key Features

• Direct Replacement: The ignition coils are designed to be the closest option to an original part, making installation fast and reducing the need for modifications.
• Compatibility Chart: The kit is professionally designed for a versatile fit across Ecoboost Ford 3.5L V6 applications when matched using the included compatibility chart.
• Improved Reliability: Replacing old coils with these units helps avoid misfires and the downstream damage that faulty coils can cause, protecting engine components.
• Durable Materials: Components are manufactured with high electrical resistance and heat tolerance to resist cracks and pin holes under operating conditions.
• Value Proposition: The bundle of six coils and NGK iridium plugs offers good value for money for a full-bank service compared with piecemeal replacements.

Who It's For

The set is aimed at owners of Ford F150, F-150, Explorer, Expedition, Navigator and other vehicles equipped with the 3.5L Ecoboost V6 from model years around 2011 through 2017 who need a full-bank ignition refresh. It is well suited to DIY mechanics comfortable following a compatibility chart and completing routine ignition work in a driveway or garage.

Those who should look elsewhere include owners unsure of their engine variant or anyone who needs dealer-level diagnostics for ongoing misfire codes that may stem from sensors or fuel system issues rather than coils or plugs. Professional installation is recommended when electrical connectors or surrounding components are corroded.

Pros & Cons

Pros

• Restores spark and reduces misfires when coils and plugs are the root cause.
• Good fit when matched with the supplied compatibility chart, leading to an easier install.
• Durable construction intended to resist heat and electrical wear for longer service life.
• Includes NGK iridium plugs which contribute to consistent ignition performance.

Cons

• Requires careful checking of the compatibility chart before purchase to ensure proper fit for specific model years.
• Not a solution for issues caused by unrelated engine faults; further diagnostics may still be needed.

Specifications

Our Verdict

For owners of the 3.5L Ecoboost V6 seeking a full-bank ignition refresh, this coil and plug set is a practical, cost-effective choice that restores performance and reduces misfires when the coils are the problem. With proper fit verification via the compatibility chart it represents good value and a sensible DIY or professional replacement option.

Frequently Asked Questions

Will these coils fit my 2014 F150 3.5 V6?
Use the included compatibility chart to confirm fit for your exact engine and VIN; the set is designed for many 2011-2017 Ecoboost 3.5L V6 applications.

Do the NGK iridium plugs come pre-gapped?
NGK iridium plugs typically require final gap verification during installation; check and adjust gap per manufacturer guidance before fitting.

Will replacing coils and plugs fix a persistent misfire?
If misfires are caused by worn coils or fouled plugs, this set should help, but persistent codes may need further diagnostics to rule out sensors or fuel system faults.