Denso 673-6306 Direct Ignition Coil

Denso Direct Ignition Coil for Ford Super Duty

Denso 673-6306 is a direct ignition stick coil built for 12-volt systems and finished in black. It is an OE-style ignition coil for Ford Super Duty applications, including Ford F-250 Super Duty and Ford F-350 Super Duty models from 2018-2022, plus Ford E-350 Super Duty models from 2018-2019.

Key Features

• Direct ignition coil, stick coil design
• 12.0-volt electrical specification
• Black housing
• OE replacement application for Ford Super Duty ignition systems
• Denso part number 673-6306

Product Details

Denso’s stick coil line is built around the company’s long experience in ignition technology and its inspection process for coil quality. This Denso 673-6306 ignition coil is intended for direct replacement use on Ford F-250 Super Duty and Ford F-350 Super Duty trucks, as well as Ford E-350 Super Duty vans in the listed model years. This part cross-references Delphi GN10953 and Standard Ignition UF865 for the same application.

Common Issues This Part Can Address

• Engine misfire caused by a weak ignition coil
• Rough idle related to inconsistent spark output
• Hard starting from ignition coil failure
• Loss of power under load in Ford Super Duty ignition systems
• Check engine light triggered by coil-related fault codes

Installation Notes and Tips

• Verify the part number and connector style before installation.
• Inspect spark plugs and related ignition components during service.
• Clear diagnostic trouble codes after replacement and confirm normal engine operation.
• Use the vehicle’s service information for torque and electrical testing procedures.

Quality Assurance

Denso manufactures this direct ignition coil with testing and inspection processes focused on ignition performance and fitment consistency. Part number 673-6306 is an OE-style replacement for the listed Ford applications.