Ignition Coil + Spark Plugs for Ford Flex (2013-2019) 3.5L Turbo

Direct-Fit Ignition Coil and Spark Plug Tune-Up Kit for 2013-2019 Ford Flex (D471)

What it Does: The ignition coil and spark plug kit replaces degraded factory ignition components on the 2013-2019 Ford Flex to resolve high-boost misfires, restore lost combustion efficiency, and stabilize idle quality.

The Stock Ford Flex Ignition Breakdown Under Boost

The twin-turbocharged 3.5L EcoBoost platform subjects ignition components to intense thermal stress and elevated cylinder pressures. Over time, the internal primary and secondary windings in the factory DG549 coil-on-plug packs suffer dialectric breakdown, resulting in intermittent spark blowout during peak boost demand. Concurrently, standard electrode erosion on factory plugs widens the gap beyond the threshold required for high-load combustion, triggering stumbling under acceleration, rough idle, and decreased fuel mileage across both cylinder banks.

The Engineering Solution

This comprehensive service kit pairs six direct-fit coil-on-plug packs with six application-calibrated spark plugs engineered specifically for forced induction. Built to mirror OEM form-factor, each coil features high-dielectric epoxy potting, durable heat-resistant boot sleeves, and a 3-pin factory-style terminal connector to ensure zero signal degradation. The matched SP534-specification plugs feature precision-machined threads and the proper cold heat range to dissipate combustion heat quickly, preventing pre-ignition and sustaining reliable arc energy across all six combustion chambers.

What's Included

• 6 Ignition Coils
• 6 Spark Plugs

Technical Specifications

Compatibility

• 2013-2019 Ford Flex Limited 3.5L Turbo (3.5L V6 GAS DOHC Turbocharged EcoBoost)

Frequently Asked Questions & Fitment Warnings

Does this fit the D471 Flex?

Yes, this is a direct fit for the 2013-2019 Ford Flex equipped with the 3.5L EcoBoost engine. Fits the 3.5L Turbo only. Not for the naturally aspirated 3.5L V6 (SE, SEL, and Limited without EcoBoost).

Should these components be installed on a warm engine?

No, always perform plug and coil replacement on a fully cooled engine to prevent cross-threading or galling in the aluminum cylinder heads, torquing all plugs to OEM specifications.

The Ford Performance Reliability Standard

Engineered to handle high-output turbocharged hauler duty, this complete ignition refresh ensures stable power delivery, smooth cruise manners, and dependable torque output under heavy passenger loads or towing.