How to inspect and replace Ignition Coil and spark plug wires on Ford Expedition?

First of all, apply the silicone dielectric compound inside each boot after detaching a spark plug wire. Replace and check for spark plug wires while you're installing new spark plugs. First off, watch for damage to the wires as the engine runs, starting with cylinder number one. The other wires should be inspected and made sure they are well fastened. Also, clean them up and see if there are any cracks on the coil packs or carbon tracking problems.

How to check and replace the electronic integrated (El) ignition system and Ignition Coil on Ford Expedition?

To check the EI ignition system, disconnect the coil's electrical connector(s) with the ignition off and use an ohmmeter to measure resistance. If not, replace the coil. For this, disconnect the battery's negative cable, the ignition coil electrical connector(s), and remove the spark plug wires. Remove the ignition coil from the engine mounting bracket. During installation, apply silicone dielectric compound inside the rubber boot before inserting each spark plug wire into the ignition coil.

Genuine Ford Expedition Ignition Coil

Ignition Coil Resistor

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9 Ignition Coils found

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Ford Expedition Coil Assembly - Ignition
Part Number: 8L3Z-12029-A
$49.48 MSRP: $78.91
You Save: $29.43 (38%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Coil, Ignition Coil
- Manufacturer Note: With Brown Coil Boots
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008-2014 Ford Expedition | 8 Cyl 5.4L | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Coil Assembly - Ignition
Part Number: HL3Z-12029-D
$78.65 MSRP: $111.64
You Save: $32.99 (30%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Ignition Coil
- Replaces: DG-560, HL3Z-12029-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2021 Ford Expedition | 6 Cyl 3.5 L GAS, 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Coil Assembly - Ignition
Part Number: HL3Z-12029-A
$78.65 MSRP: $111.64
You Save: $32.99 (30%)
ADD TO CART
Product Specifications
- Other Name: Coil Assy - Ignition
- Replaced by: HL3Z-12029-D
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2019 Ford Expedition | 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Coil Assembly - Ignition
Part Number: 3W7Z-12029-AA
$57.20 MSRP: $94.55
You Save: $37.35 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Coil Assy - Ignition; Coil, Ignition Coil
- Replaces: 1L2Z-12029-AA, 8W7Z-12029-A, DG-540
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2001-2004 Ford Expedition | 8 Cyl 4.6L, 8 Cyl 4.6L Romeo SOHC EFI, 8 Cyl 5.4L, 8 Cyl 5.4L Modular SOHC | 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 4AT 4R100, 4AT 4R70W, 4AT 4R75W, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Coil Assembly - Ignition
Part Number: BL3Z-12029-C
$72.05 MSRP: $119.09
You Save: $47.04 (40%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Coil Assy - Ignition; Ignition Coil
- Replaces: DG-548, BL3Z-12029-B, BL3Z-12029-A, DG-547
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2017 Ford Expedition | 6 Cyl 3.5L GTDI | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Coil Assembly - Ignition
Part Number: 3L3Z-12029-BA
$48.95 MSRP: $80.91
You Save: $31.96 (40%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Coil, Ignition Coil
- Manufacturer Note: With Black Coil Boots
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Ford Expedition | 8 Cyl 5.4L | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Ford Expedition Coil Assembly - Ignition
Part Number: 1L2Z-12029-AA
$57.20 MSRP: $94.55
You Save: $37.35 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Coil Assy - Ignition
- Replaced by: 3W7Z-12029-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2001-2002 Ford Expedition | 8 Cyl 4.6L, 8 Cyl 5.4L | 4AT 4R100, 4AT 4R70W
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Ford Expedition Coil Assembly - Ignition
Part Number: F5LY-12029-A
$71.28 MSRP: $117.82
You Save: $46.54 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Coil Assy - Ignition
- Manufacturer Note: EDIS coil
- Replaced by: 7U2Z-12029-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1997-1999 Ford Expedition | 8 Cyl 4.6L | 4AT 4R100, 4AT 4R70W, 4AT E4OD
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Ford Expedition COIL ASY - IGNITION
Part Number: ML3Z-12029-A
$72.85 MSRP: $116.18
You Save: $43.33 (38%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Ignition Coil
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2022-2024 Ford Expedition | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS

Ford Expedition Ignition Coil

The Ignition Coil in Ford Expedition vehicles work with the important duty of stepping up the electricity flow in the car from 12 volts to 15,000 - 40,000 volts required to ignite the air/fuel mixture in the engine's cylinders. By using a primary circuit which comprises the battery and the switch, the current flows and in the secondary circuit, the current flows to the spark plugs. An ignition coil can be made up of two insulated copper wire coils that are wound round an iron core, where the primary winding turns usually have fewer layers of thicker wire than the secondary winding turned with several layers of thinner wire. As the model year has progressed, the Ford Expeditions have incorporated the choice ignition coil style, including the coil pack, coil on plug, and wasted ignition arrangements. Older models generally used a single coil pack arrangement but newer models use the COP systems where individual coils are associated with each spark plug. The main one is concerned with the efficiency and the performance, COP systems delivering a more direct and a far more reliable ignition. DTC and OTC signs of ignition coil failure include rough running, poor fuel economy, hard starting, and should therefore be replaced on time to enhance vehicle performance.

We provide a wide range of Ford Expedition Ignition Coil at the best prices possible. If you need Ford Expedition Ignition Coil, you can shop with confidence on our website. All our OEM parts come with a manufacturer's warranty and are delivered to your door step with a fast delivery service.

Ford Expedition Ignition Coil Parts Questions & Experts Answers

Coil Assembly - Ignition
8L3Z-12029-A
Q: How to inspect and replace Ignition Coil and spark plug wires on Ford Expedition?
A: First of all, apply the silicone dielectric compound inside each boot after detaching a Spark Plug wire. Replace and check for spark plug wires while you're installing new spark plugs. First off, watch for damage to the wires as the engine runs, starting with cylinder number one. The other wires should be inspected and made sure they are well fastened. Also, clean them up and see if there are any cracks on the coil packs or carbon tracking problems.
Coil Assembly - Ignition
3W7Z-12029-AA
Q: How to check and replace the electronic integrated (El) ignition system and Ignition Coil on Ford Expedition?
A: To check the EI ignition system, disconnect the coil's electrical connector(s) with the ignition off and use an ohmmeter to measure resistance. If not, replace the coil. For this, disconnect the battery's negative cable, the ignition coil electrical connector(s), and remove the spark plug wires. Remove the ignition coil from the engine mounting bracket. During installation, apply silicone dielectric compound inside the rubber boot before inserting each spark plug wire into the ignition coil.