Ignition Coil + Spark Plugs for Ford Transit-150 250 350 350 HD (2015-2020) 3.5L Turbo

Direct-Replacement Ignition Coil and Spark Plug Kit for 2015-2020 Ford Transit (V363)

What it Does: The ignition coil and spark plug tune-up kit restores factory combustion efficiency and high-boost spark stability on the 2015-2020 Ford Transit 3.5L EcoBoost to eliminate cylinder misfires, rough idle, and spark blow-out under load.

The Stock Ford Transit Ignition Breakdown

Under continuous commercial duty cycles and heavy towing loads, the V363 platform's twin-turbocharged 3.5L EcoBoost engine operates under intense cylinder pressures and extreme engine bay heat soak. Over mileage cycles, the factory secondary winding insulation breaks down within the coil packs, resulting in high-voltage micro-arcing and boot carbon tracking. Simultaneously, the factory spark plug gap erodes from sustained turbo boost, demanding higher ionization voltage than aging coils can deliver. This ignition degradation triggers P0300 through P0306 DTC misfire codes, sudden hesitation during transient boost ramp-up, sluggish throttle response, and unburnt fuel washing down cylinder walls.

The Engineering Solution

This direct-replacement kit replaces all six coil-on-plug units and matched spark plugs simultaneously to rebalance spark energy across both cylinder banks. Each ignition coil features high-dielectric epoxy resin encapsulation to withstand cyclic thermal expansion without developing internal dielectric breakdown, coupled with heat-stabilized silicone boots that isolate high-kV energy from the plug wells. The direct-fit 3-pin connectors maintain factory harness retention without modification. The companion spark plugs come pre-calibrated to the exact heat range and electrode gap required for forced-induction cylinder pressures, resisting pre-ignition and quenching under peak commercial boost levels.

What's Included

• 6 Ignition Coils
• 6 Spark Plugs

Technical Specifications

Compatibility

• 2015-2020 Ford Transit-150 3.5L Turbo (3.5L V6 GAS DOHC Turbocharged EcoBoost)
• 2015-2020 Ford Transit-250 3.5L Turbo (excluding 2018 Transit-250 PTV)
• 2015-2020 Ford Transit-350 3.5L Turbo
• 2015-2020 Ford Transit-350 HD 3.5L Turbo

Frequently Asked Questions & Fitment Warnings

Does this fit the V363 Transit?

Yes, this is a direct fit for the 2015-2020 Ford Transit equipped with the 3.5L EcoBoost engine. Fits the 3.5L Turbo only. Not for the 3.7L V6 gas, 3.2L diesel, or 2.0L diesel Transit, not for the Transit Connect, and not for 2021 and newer Transit models. Also excludes 2018 Transit-250 PTV.

What are the critical installation guidelines for this ignition service?

Perform the service exclusively on a cold engine, torque each spark plug to factory specifications to prevent cylinder head thread galling, and avoid overtightening the coil retention fasteners.

The Ford Commercial Standard

Fleet-level uptime depends on clean combustion under high torque demands. These replacement ignition components match the thermal durability, sustained boost resistance, and high-amp discharge requirements vital for severe-duty hauling and fleet longevity.