Ignition Coil & Iridium Spark Plugs for Toyota Tundra (2011-2014) 4.0L V6

High-Output Ignition Coils & Iridium Spark Plugs for 2011-2014 Toyota Tundra (1GR-FE / XK50)

What it Does: This complete ignition service kit replaces degraded factory coils and worn plugs to restore optimal combustion, eliminate misfires, and stabilize idle in high-mileage 4.0L V6 engines.

The Stock Tundra Ignition Weaknesses

Over time, the factory 1GR-FE ignition coils suffer from thermal breakdown due to prolonged heat cycling in the engine bay. The original epoxy potting deteriorates and cracks, allowing moisture intrusion and secondary voltage leaks. This leads to weak spark delivery, noticeable hesitation under load, and eventual P0300-series misfire codes. Furthermore, standard-issue spark plugs experience electrode erosion past 60,000 miles. This erosion widens the spark gap, forcing the aging ignition coils to work harder to jump the gap, accelerating their internal failure and negatively impacting overall fuel efficiency.

The Engineering Solution

This kit replaces the failure-prone OEM components with six high-dielectric epoxy ignition coils and six precision-gapped iridium spark plugs. The upgraded coils feature enhanced copper wiring and optimized primary/secondary winding ratios to deliver higher voltage output and much faster recovery times between firing events. Paired with the ultra-fine iridium center electrodes—which require significantly less voltage to bridge the gap and boast exceptional resistance to heat and arc wear—this system ensures a highly concentrated, reliable spark. The direct result is a more complete fuel burn, smoother power delivery across the RPM range, and restored low-end torque essential for heavy load applications.

Technical Specifications

Compatibility

• 2011 Toyota Tundra 4.0L V6
• 2012 Toyota Tundra 4.0L V6
• 2013 Toyota Tundra 4.0L V6
• 2014 Toyota Tundra 4.0L V6

The Toyota Towing Reliability

Engineered for grueling work environments, these upgraded ignition components provide the reliability and durability required for consistent towing and hauling, ensuring your truck performs optimally without triggering diagnostic trouble codes under heavy operational stress.