6 High Performance Ignition Coil for Lincoln Navigator (2015-2017) 3.5L Engine

High-Output Ignition Coil Set for 2015-2017 Lincoln Navigator (3.5L EcoBoost / U322)

What it Does: This ignition coil set replaces the OEM UF646 components to ensure high-voltage spark delivery, eliminating misfires under load and stabilizing the combustion cycle in twin-turbocharged EcoBoost applications.

The Stock Navigator Thermal Bottleneck

The 3.5L EcoBoost engine in the U322 chassis operates under high cylinder pressures and significant under-hood thermal stress. The factory ignition coils often succumb to dielectric breakdown as the internal copper windings and insulating epoxy degrade over repeated heat cycles. This thermal fatigue leads to micro-cracks in the housing, allowing voltage leakage—commonly known as carbon tracking. In the Navigator, this manifests as a shudder during towing or hesitation during heavy acceleration, as the stock coils fail to overcome the increased resistance required to jump the spark gap under boost.

The Engineering Solution

These high-performance coils are engineered to exceed factory output by utilizing high-dielectric epoxy resin and premium magnetic copper wire. The internal windings are increased to provide a higher turns ratio, resulting in a more consistent spark at high RPMs and under peak boost conditions. The housing is constructed from high-grade reinforced PPO (Polyphenylene Oxide) to resist thermal expansion and chemical degradation from engine oils and fuels. Each coil is vacuum-potted to eliminate air bubbles, which are the primary cause of internal arcing, ensuring the 3.5L EcoBoost maintains peak flame kernel propagation for a more complete burn.

Technical Specifications

Compatibility

• 2015 Lincoln Navigator 3.5L V6
• 2016 Lincoln Navigator 3.5L V6
• 2017 Lincoln Navigator 3.5L V6

The Lincoln Durability Standard

As a heavy-duty SUV frequently utilized for towing and long-distance travel, the Navigator demands ignition components that offer both longevity and reliability. These coils are designed to handle the rigorous duty cycles of the U322 platform, ensuring that whether you are navigating mountain passes or city traffic, your ignition system remains stable without triggering Check Engine Lights (CEL) or compromise in fuel economy.