UF621 Ignition Coils Pack & Iridium Spark Plugs Compatible with Ford

In this review the UF621 ignition coils pack and iridium spark plugs are assessed for drivers who need a reliable replacement for Ford, Lincoln, Mazda and Mercury 2.0L and 2.5L engines. The bottom line: this set is for owners seeking improved ignition stability and consistent combustion across a range of late-model vehicles, delivering noticeable drivability improvements where worn coils or plugs caused misfires. The reviewer found installation straightforward on compatible engines and observed steadier idle and responsiveness after fitment, making it a practical repair or preventive maintenance choice.

Key Features

• Vehicle Compatibility: Covers a broad list of Ford, Lincoln, Mazda and Mercury models from 2009 through 2022, which simplifies ordering for owners of C-Max, Escape, Fusion, Transit Connect, MKZ, Tribute, Mariner and Milan.
• Direct Fit Replacement: Designed to replace OEM part numbers such as UF-621 and L50718100A, helping ensure correct fit and electrical connections without modification.
• Improved Ignition Performance: The coils provide a stable high-voltage output that supports consistent spark plug ignition and more complete fuel combustion for smoother running.
• Durable Construction: Built with copper windings and a ceramic insulator to withstand engine bay heat and the demands of repeated ignition cycles.
• Set of Four: Supplied as a set of four coils and plugs so users can refresh multiple cylinders at once for balanced performance.

Who It's For

This product is aimed at DIY mechanics and independent repair shops working on Ford 2.0L and 2.5L engines and related Lincoln, Mazda and Mercury models listed in the compatibility notes. It suits owners experiencing misfires, poor idle, reduced fuel economy, or those who want preventative maintenance to avoid hard-to-diagnose running issues.

Those who should look elsewhere include owners of vehicles outside the specific model years or engines listed, or anyone requiring a factory-branded OEM coil for dealer service records; this offering is a high-quality aftermarket replacement rather than a factory-labeled part.

Pros & Cons

Pros

• Good build quality with copper windings and ceramic insulator for reliable operation.
• Wide compatibility across Ford, Lincoln, Mazda and Mercury 2.0L and 2.5L applications simplifies purchasing.
• Delivers stable ignition output that customers report improves functionality and engine smoothness.

Cons

• Not a factory-branded OEM part, which may matter for vehicles kept under strict dealer service policies.

Specifications

Our Verdict

The UF621 ignition coils pack and iridium spark plugs are a sensible aftermarket replacement for owners of compatible Ford, Lincoln, Mazda and Mercury models who want reliable ignition performance at a reasonable cost. It improves combustion consistency and drivability in engines where aging coils or plugs have introduced rough idle or misfires, representing good value for DIY repairs and routine maintenance.

Frequently Asked Questions

Will these coils fit my Fusion or Escape?
Check the specific model years and engine size in the compatibility list; they are intended for select 2.0L and 2.5L Fusion and Escape model years.

Are these OEM parts?
These are high-quality aftermarket replacements that match common OEM part numbers but are not sold as factory-branded original parts.

Do they come with spark plugs included?
Yes, the set is supplied as a pack that pairs ignition coils with iridium spark plugs for multiple cylinders.