Walker 921-2066 Ignition Coil

Walker ThunderSpark Ignition Coil

Walker ThunderSpark ignition coil Part Number 921-2066 is a direct-fit ignition coil for select Ford, Lincoln, and Mercury applications. It is listed for 2008-2014 models including Ford Expedition, Explorer, F-150, Mustang, Lincoln Navigator, and Mercury Mountaineer.

Key Features

• Ignition coil for select V8 applications
• Walker ThunderSpark product line
• Fitment listed for Ford, Lincoln, and Mercury vehicles
• Direct replacement format for service and repair work
• Part Number 921-2066 for accurate ordering and lookup

Detailed Description

Walker ThunderSpark 921-2066 is an ignition coil built for specific 2008-2014 Ford, Lincoln, and Mercury vehicles. Compatible applications include Fits 2009-2014 Ford Expedition, N/A; Fits 2009-2010 Ford Explorer, N/A; Fits 2009-2010 Ford Explorer Sport Trac, N/A; Fits 2009-2010 Ford F-150, N/A; Fits 2009-2010 Ford F-250 Super Duty, N/A; Fits 2009-2010 Ford F-350 Super Duty, N/A; Fits 2009-2010 Ford Mustang, N/A; Fits 2009-2014 Lincoln Navigator, N/A; and Fits 2009-2010 Mercury Mountaineer, N/A. Additional 2008 applications are listed for Ford Expedition, Explorer, Explorer Sport Trac, F-150, F-250 Super Duty, F-350 Super Duty, Mustang, Lincoln Mark LT, Lincoln Navigator, and Mercury Mountaineer, with notes shown in the fitment data.

The ThunderSpark line identifies this coil as part of Walker’s ignition offering for vehicles that require the specified coil configuration. Use Part Number 921-2066 when matching the replacement to the original ignition coil on the vehicle.

Common Repair Uses

• Engine misfire diagnosis
• Rough idle correction
• Hard-start or no-start troubleshooting
• Loss of spark under load
• Check engine light concerns related to ignition performance

Installation Notes

Verify the original coil style, connector, and engine application before installation. Confirm the vehicle year, make, and model against the fitment list, especially for 2008 vehicles with note-specific configurations such as brown coil or single-coil applications. Match the existing part number 921-2066 and compare the removed coil to the replacement before service.

Quality Assurance

Walker ThunderSpark ignition coil 921-2066 is cataloged for the listed Ford, Lincoln, and Mercury applications to support accurate replacement selection. No warranty information was provided in the product data.