ignition

Ignition Coil - Single

for 2021 Ford F-150 3.5L V6 EcoBoost · 4WD

Difficulty

Easy

Time

36 min

Tools

Steps

This procedure covers the removal and replacement of a single ignition coil on the 3.5L EcoBoost V6 engine in a 2021-2024 Ford F-150 RWD.

Warnings

⚠Allow engine to cool completely before beginning work to avoid burns from hot engine components.

⚠The 3.5L EcoBoost has twin turbos; some coils may be difficult to access and require turbo heat shield removal.

ℹ️This procedure assumes work on an easily accessible coil. Rear bank coils (#4, #5, #6) may require additional removal of intercooler piping or heat shields.

Tools required

10mm socketEssential

3/8-inch ratchetEssential

3-inch socket extensionEssential

Torque wrench (5-30 Nm range)Essential

Dielectric grease

Compressed air

Parts

Ignition coil × 1 — Motorcraft DG-532 or equivalent

Preparation

Ensure engine is completely cool to the touch
Disconnect negative battery terminal and wait 2 minutes for system capacitors to discharge
Identify which cylinder requires coil replacement (cylinders 1-3 are passenger side, 4-6 are driver side, numbered front to rear)
Remove engine cover by pulling upward on quick-release grommets

Procedure

1
Access the ignition coil
Locate the faulty ignition coil on the cylinder head. For rear bank coils (driver side), you may need to remove intercooler piping or turbo heat shields for adequate access. Use compressed air to clean debris from around the coil boot area to prevent contamination from falling into the spark plug well.
2
Disconnect electrical connector
Press the locking tab on the ignition coil electrical connector and pull straight up to disconnect. Do not pull on the wiring harness itself. If the connector is stuck, gently wiggle it side to side while pulling upward.
3
Remove ignition coil bolt
Using a 10mm socket with extension, remove the single bolt securing the ignition coil to the valve cover. Keep the bolt in a safe location as it will be reused.
4
Extract the ignition coil
Grasp the ignition coil firmly and pull straight upward with a twisting motion to break the seal between the coil boot and spark plug. The coil may be tight due to heat cycling. Avoid excessive side-to-side rocking which could damage the spark plug ceramic insulator.
5
Inspect spark plug well
Inspect the spark plug well for oil, coolant, or debris. Oil in the well indicates a valve cover gasket leak that should be addressed. Use compressed air to clean the well if necessary. Inspect the spark plug tip for damage or unusual wear patterns.
⚠Never allow debris to fall into the spark plug well as it can damage the spark plug or cylinder.
6
Prepare new ignition coil
Remove the new ignition coil from packaging and inspect the rubber boot for damage. Apply a thin coat of dielectric grease to the inside of the coil boot to aid in future removal and prevent arcing. Do not over-apply as excess grease can attract debris.
7
Install new ignition coil
Align the new ignition coil with the spark plug and push down firmly with a twisting motion until it seats completely on the spark plug. You should feel the boot click into place. Ensure the mounting hole aligns with the valve cover threaded hole.
8
Secure ignition coil
Install the ignition coil bolt and tighten to specification using a torque wrench. Do not overtighten as this can crack the coil housing or strip the aluminum valve cover threads.
Torque spec
Ignition Coil Bolts8 Nm (6 lb-ft)
9
Reconnect electrical connector
Push the electrical connector onto the ignition coil terminal until it clicks into place. Gently tug on the connector to verify it is fully locked. Ensure the wiring harness has adequate slack and is not stretched or pinched.
10
Reinstall removed components
If any intercooler piping, heat shields, or other components were removed for access, reinstall them now with their respective fasteners torqued to specification. Reinstall the engine cover by aligning and pressing down on the quick-release grommets.

Reassembly

Reconnect the negative battery terminal and tighten securely
Ensure all tools and parts are removed from the engine bay
Double-check that all electrical connectors are fully seated and locked

Verification

Start the engine and verify it runs smoothly without misfires or rough idle
Check for diagnostic trouble codes using an OBD-II scanner; clear any existing misfire codes
Allow engine to reach operating temperature and verify smooth operation under light acceleration
Listen for any abnormal sounds or vibrations that could indicate improper coil installation
Visually inspect the coil area for any loose connectors or fasteners