How to check the primary and secondary resistance of a coil and replace it on 2000-2011 Ford Ranger?

To check a coil's primary resistance, disconnect the coil's electrical connector and use an ohmmeter across the primary terminals. The resistance should be under 5.0 ohms. If it's a high or open circuit, the coil might be faulty. To replace the coil, disconnect the battery's negative cable, the ignition coil connector(s), and spark plug wires. Remove the coil's securing bolts and install the new coil. Coat the rubber boot interior with Silicone Dielectric Compound and insert the spark plug wires into the terminals. Reinstall the radio ignition interference capacitor if needed.

How to check and replace the ignition coil on a 1993-2011 Ford Ranger with a distributor ignition system?

It is very important to check the coil resistance for 1993 and 1994 3.0L V6 engines which have distributor ignition. Disconnect the wires from the coil with ignition turned off and measure resistance by use of an ohmmeter. Primary terminals should be less than 5.0 ohms. Measure resistance between negative primary terminal and secondary terminal, aiming for 10-15K ohms. For replacement, disconnect the battery, primary coil connector, and coil secondary lead. Remove the bracket bolts and detach the coil, then reversal is done when installing it back again. For engines without electronic distributorless ignition, this process is similar. With ignition off, disconnect electrical connector from coil measuring primary resistance below 5.0 ohms. Measure resistance between secondary terminals, considering paired cylinders. Replacement involves disconnecting the battery, ignition coil electrical connector(s), and spark plug wires; remove bolts securing the ignition coil; installation is reverse while making sure spark plug lead is properly coated with Silicone Dielectric on each cylinder's spark plug end.

Genuine Ford Ranger Ignition Coil

Ignition Coil Resistor

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10 Ignition Coils found

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Ford Ranger Coil Assembly - Ignition
Part Number: F57Z-12029-A
$159.72 MSRP: $320.00
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Product Specifications
- Other Name: Coil Assy - Ignition
- Replaced by: F57Z-12029-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1995-2000 Ford Ranger | 6 Cyl 3.0L | 4AT 4R44E, 4AT 4R55E, 4AT A4LD, 5AT 5R55E, 5MT
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Ford Ranger Coil Assembly - Ignition
Part Number: FOTZ-12029-A
$83.49 MSRP: $138.00
You Save: $54.51 (40%)
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Product Specifications
- Other Name: Coil, Ignition Coil
- Manufacturer Note: OHV, SOHC
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2004-2011 Ford Ranger | 6 Cyl 4.0L SOHC EFI | 5-Speed Automatic Transmission - 5R44E/5R55E, 5-Speed Manual Transmission - R1HD, 5-Speed Manual Transmission M5R1, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
- 1990-2000 Ford Ranger | 6 Cyl 4.0L | 4AT 4R44E, 4AT 4R55E, 4AT A4LD, 5AT 5R55E, 5MT
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Ford Ranger Coil Assembly - Ignition
Part Number: 1F2Z-12029-AC
$79.07 MSRP: $128.36
You Save: $49.29 (39%)
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Product Specifications
- Other Name: Coil Assy - Ignition
- Replaced by: 5F2Z-12029-AD
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2001-2008 Ford Ranger | 6 Cyl 3.0L, 6 Cyl 3.0L OHV EFI | 4AT 4R44E, 5AT 5R44E, 5AT 5R55E, 5MT, 5-Speed Automatic Transmission - 5R44E/5R55E, 5-Speed Manual Transmission - R1HD, 5-Speed Manual Transmission M5R1, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Ranger Coil Assembly - Ignition
Part Number: 1S7Z-12029-AD
$57.28 MSRP: $113.82
You Save: $56.54 (50%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Coil Assy - Ignition; Coil, Ignition Coil
- Replaces: 1S7Z-12029-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2001-2011 Ford Ranger | 4 Cyl 2.3L, 4 Cyl 2.3L NA Petrol | 4AT 4R44E, 5-Speed Automatic Transmission - 5R44E/5R55E, 5-Speed Manual Transmission - R1HD, 5-Speed Manual Transmission M5R1, 5AT 5R44E, 5AT 5R55E, 5MT, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Ranger Coil Assembly - Ignition
Part Number: 1S7Z-12029-AA
$57.28 MSRP: $113.82
You Save: $56.54 (50%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Coil Assy - Ignition
- Replaced by: 1S7Z-12029-AD
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2001-2010 Ford Ranger | 4 Cyl 2.3L, 4 Cyl 2.3L NA Petrol | 4AT 4R44E, 5AT 5R44E, 5AT 5R55E, 5MT, 5-Speed Automatic Transmission - 5R44E/5R55E, 5-Speed Manual Transmission - R1HD, 5-Speed Manual Transmission M5R1, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Ranger Coil Assembly - Ignition
Part Number: E8TZ-12029-A
$71.28 MSRP: $117.82
You Save: $46.54 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Coil Assy - Ignition
- Replaced by: 7U2Z-12029-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1988-1992 Ford Ranger | 4 Cyl 2.0L, 4 Cyl 2.3L, 6 Cyl 2.9L | 4AT A4LD, 5MT
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Ford Ranger Coil Assembly - Ignition
Part Number: JX6Z-12029-B
$59.39 MSRP: $118.00
You Save: $58.61 (50%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Ignition Coil
- Replaces: JX6Z-12029-A, DG-574
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2019-2023 Ford Ranger | 4 Cyl 2.3 L GAS, 4 Cyl 2.3L TIVCT DI TC | 10-Speed Automatic Transmission (10R80), 2 Whl L/H Rear Drive-High Ride, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive
View related parts
Ford Ranger Coil Assembly - Ignition
Part Number: JX6Z-12029-A
$59.39 MSRP: $118.00
You Save: $58.61 (50%)
ADD TO CART
Product Specifications
- Other Name: COIL ASY - IGNITION
- Replaced by: JX6Z-12029-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2019 Ford Ranger | 4 Cyl 2.3L TIVCT DI TC | 10-Speed Automatic Transmission (10R80), 2 Whl L/H Rear Drive-High Ride, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive
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Ford Ranger Coil Assembly - Ignition
Part Number: F5SZ-12029-A
$89.26 MSRP: $144.91
You Save: $55.65 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Coil Assy - Ignition
- Replaced by: F5SZ-12029-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1998-2000 Ford Ranger | 6 Cyl 3.0L | 4AT 4R44E, 5AT 5R55E, 5MT
View related parts
Ford Ranger Coil Assembly - Ignition
Part Number: F37Z-12029-A
$71.28 MSRP: $117.82
You Save: $46.54 (40%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Coil Assy - Ignition
- Replaced by: 7U2Z-12029-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1993-2001 Ford Ranger | 4 Cyl 2.3L, 4 Cyl 2.5L | 4AT 4R44E, 4AT 4R55E, 4AT A4LD, 5AT 5R44E, 5AT 5R55E, 5MT

Ford Ranger Ignition Coil Parts Questions & Experts Answers

Coil Assembly - Ignition
1F2Z-12029-AC
Q: How to check the primary and secondary resistance of a coil and replace it on 2000-2011 Ford Ranger?
A: To check a coil's primary resistance, disconnect the coil's electrical connector and use an ohmmeter across the primary terminals. The resistance should be under 5.0 ohms. If it's a high or open circuit, the coil might be faulty. To replace the coil, disconnect the battery's negative cable, the ignition coil connector(s), and spark plug wires. Remove the coil's securing bolts and install the new coil. Coat the rubber boot interior with Silicone Dielectric Compound and insert the spark plug wires into the terminals. Reinstall the radio ignition interference capacitor if needed.
Coil Assembly - Ignition
1S7Z-12029-AA
Q: How to check and replace the ignition coil on a 1993-2011 Ford Ranger with a distributor ignition system?
A: It is very important to check the coil resistance for 1993 and 1994 3.0L V6 engines which have distributor ignition. Disconnect the wires from the coil with ignition turned off and measure resistance by use of an ohmmeter. Primary terminals should be less than 5.0 ohms. Measure resistance between negative primary terminal and secondary terminal, aiming for 10-15K ohms. For replacement, disconnect the battery, primary coil connector, and coil secondary lead. Remove the bracket bolts and detach the coil, then reversal is done when installing it back again. For engines without electronic distributorless ignition, this process is similar. With ignition off, disconnect electrical connector from coil measuring primary resistance below 5.0 ohms. Measure resistance between secondary terminals, considering paired cylinders. Replacement involves disconnecting the battery, ignition coil electrical connector(s), and spark plug wires; remove bolts securing the ignition coil; installation is reverse while making sure spark plug lead is properly coated with Silicone Dielectric on each cylinder's spark plug end.