Ignition Coil and Iridium Spark Plugs for Lincoln Navigator (2005-2013) 5.4L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2005-2013 Lincoln Navigator

What it Does: Delivers complete secondary ignition renewal by replacing degraded factory coil-on-plug units and worn spark plugs with heavy-duty copper-wound coils and erosion-resistant iridium plugs to eliminate cylinder misfires under load.

The Stock Navigator Ignition Breakdown

The 5.4L 3-Valve Modular Triton V8 subjects secondary ignition components to intense thermal stress inside deep cylinder head wells. Over time, OEM coil epoxy potting degrades from constant heat cycling, leading to internal short circuits across the copper windings. Combined with electrode erosion on high-mileage spark plugs, secondary voltage demand spikes, resulting in spark blow-out, severe bucking under towing load, hesitation, poor fuel economy, and P0300-P0308 misfire codes.

The Engineering Solution

This comprehensive kit features eight coil-on-plug assemblies engineered with high-conductivity internal copper windings, durable thermoplastic housings, and high-dielectric insulation to resist breakdown under extreme combustion temperatures. Matched with eight fine-wire iridium spark plugs, the system provides high thermal stability, reduced required firing voltage, and a focused spark kernel for complete flame-front propagation across the combustion chamber.

Technical Specifications

Compatibility

• 2005-2013 Lincoln Navigator Base (5.4L V8)
• 2007-2013 Lincoln Navigator L (5.4L V8)
• 2005-2013 Lincoln Navigator Ultimate (5.4L V8)

The Lincoln Durability Standard

Engineered to handle the high-torque demands and sustained thermal loads of full-size luxury towing, this ignition kit maintains consistent spark delivery across the entire RPM band to protect your catalytic converters and restore smooth, quiet operation.