Ignition Coil and Iridium Spark Plugs for Ford Five Hundred (2005-2007) 3.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2005-2007 Ford Five Hundred

Complete secondary ignition overhaul kit: Replaces degraded factory coil-on-plug units and worn spark plugs to eliminate misfire codes, erratic idle, and hesitation under load.

The Stock Five Hundred Thermal Degradation and Coil Breakdown

The transverse layout of the 3.0L Duratec engine exposes the rear cylinder bank to extreme under-hood heat soak on the D3 platform. Over time, OEM coil insulation breaks down through continuous thermal cycling, causing internal dielectric breakdown, micro-arcing, and high-voltage leakage. Paired with worn factory plug gaps that increase required arc voltage, this excessive resistance overworks the PCM ignition drivers and triggers persistent P0300-P0306 misfire trouble codes.

The Engineering Solution

This service kit restores primary and secondary ignition stability. Each coil-on-plug assembly is engineered with high-conductivity internal copper windings, direct-fit blade terminals, and high-dielectric silicone boots that resist thermal cracking. The included fine-wire iridium spark plugs lower the required firing voltage, providing superior anti-fouling capabilities, uniform flame kernel expansion, and dependable combustion stability under all engine load conditions.

Technical Specifications

Compatibility

• 2005 Ford Five Hundred 3.0L V6 (FWD / AWD; SE, SEL, Limited)
• 2006 Ford Five Hundred 3.0L V6 (FWD / AWD; SE, SEL, Limited)
• 2007 Ford Five Hundred 3.0L V6 (FWD / AWD; SEL, Limited)

The Ford Drivetrain Reliability Standard

Designed to maintain continuous factory ignition parameters, this direct-fit kit ensures smooth transient throttle response, stable cold-start operation, and long-term drivetrain reliability without risk of check-engine warnings.