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.

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.

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
$49.91 MSRP: $78.91
You Save: $29.00 (37%)
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)
View related parts
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
$50.73 MSRP: $80.91
You Save: $30.18 (38%)
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
$58.46 MSRP: $116.18
You Save: $57.72 (50%)
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 Parts Questions & Experts Answers

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.
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.