Denso 673-6008 Direct Ignition Coil

Denso 673-6008 Ignition Coil Overview

The Denso 673-6008 direct ignition coil is a coil-on-plug replacement built for Ford, Lincoln, and Mercury applications that use a 12-volt ignition coil in a gray housing. It is a fitment-based solution for restoring spark output on vehicles such as the Ford Mustang, Lincoln Navigator, and Mercury Marauder.

DENSO’s Coil on Plug line focuses on stick coil technology with controlled testing and inspection processes to support consistent ignition performance. This part number, 673-6008, is a direct ignition coil for vehicles that require a coil-on-plug design.

Key Features

• Direct ignition coil for coil-on-plug applications
• 12-volt electrical specification
• Gray housing
• Fits select Ford Mustang, Ford GT, Lincoln Aviator, Lincoln Navigator, Mercury Marauder, Lincoln Blackwood, Lincoln Continental, and Lincoln Mark VIII applications
• OE-style replacement for ignition service on listed vehicles

Detailed Product Description

The Denso 673-6008 is engineered as a direct ignition coil for coil-on-plug systems, where each coil mounts directly to the spark plug. This design supports precise ignition delivery on the listed Ford Mustang, Lincoln Navigator, and Mercury Marauder applications, along with other compatible Ford, Lincoln, and Mercury vehicles shown in the fitment data. If you are replacing a failing coil on a 1997-2014 Ford Mustang or servicing a 1999-2004 Lincoln Navigator, this part number provides a fitment-specific replacement path.

This part cross-references Motorcraft DG 543 and Standard Ignition UF191 for the same application.

Vehicle Fitment

• Fits 2007-2014 Ford Mustang, Coil on Plug
• Fits 2003-2004 Ford Mustang, Coil on Plug
• Fits 2001 Ford Mustang, Coil on Plug
• Fits 1999 Ford Mustang, Coil on Plug
• Fits 2005-2006 Ford GT, Coil on Plug
• Fits 2003-2005 Lincoln Aviator, Coil on Plug
• Fits 1999-2004 Lincoln Navigator, Coil on Plug
• Fits 2003-2004 Mercury Marauder, Coil on Plug
• Fits 2002 Lincoln Blackwood, Coil on Plug
• Fits 1998-2002 Lincoln Continental, Coil on Plug
• Fits 1997-1998 Lincoln Mark VIII, Coil on Plug

Common Issues This Coil May Address

• Engine misfire caused by a weak or failed ignition coil
• Rough idle during acceleration or at stop
• Hard starting related to inconsistent spark output
• Loss of power under load in coil-on-plug systems
• Check engine light triggered by ignition-related fault codes

Installation Notes and Tips

Verify the original coil part number, connector style, and vehicle application before installation. On coil-on-plug systems, inspect the spark plug well, boot condition, and related ignition components during service to help confirm the root cause of the failure. Use the fitment data to match the correct Ford Mustang, Lincoln Navigator, or Mercury Marauder application before ordering.

Quality Assurance

DENSO backs this Coil on Plug product line with testing and inspection processes focused on ignition coil quality and consistency. The 673-6008 is built for direct replacement use in the listed applications and follows DENSO’s established coil technology approach.