Denso 673-4021 Direct Ignition Coil

Reliable Ignition Performance for Nissan and INFINITI Vehicles

The Denso 673-4021 direct ignition coil delivers consistent 12-volt ignition power designed specifically for select Nissan and INFINITI models. Engineered to meet OEM specifications, this ignition coil ensures efficient spark delivery for smooth engine operation.

• Direct ignition coil design for precise spark control
• Operates at 12 volts for optimal ignition performance
• Durable black housing for long-lasting use
• Compatible with Nissan Armada, Pathfinder Armada, TITAN, and INFINITI QX56
• Part number 673-4021 for accurate replacement

About the Denso Coil on Plug Product Line

The Denso Coil on Plug product line features ignition coils designed to mount directly on the spark plug, eliminating the need for spark plug wires. This design improves ignition efficiency and reduces energy loss, contributing to better engine performance and reliability. The 673-4021 coil is part of this line, providing a direct ignition solution tailored for specific Nissan and INFINITI models.

Product Details and Specifications

This ignition coil operates at a standard 12-volt electrical system voltage, compatible with the electrical architecture of the Nissan Armada, Pathfinder Armada, TITAN, and INFINITI QX56. The black color housing is engineered for durability and heat resistance, ensuring stable performance under various driving conditions. The direct ignition coil design simplifies installation and enhances ignition timing accuracy.

Common Applications and Issues Addressed

• Replacement for faulty or worn ignition coils in Nissan Armada and Pathfinder Armada
• Restores proper spark delivery in INFINITI QX56 engines
• Resolves engine misfires and rough idling in Nissan TITAN vehicles
• Improves starting reliability and fuel efficiency
• Eliminates ignition coil-related check engine light triggers

Installation Notes and Tips

Ensure the vehicle's ignition system is powered off before beginning installation. The direct ignition coil mounts directly onto the spark plug, so verify compatibility with the specific engine model. Handle the coil carefully to avoid damage to the electrical connectors. Consult the vehicle’s service manual for torque specifications and installation procedures.

Quality Assurance and Warranty

Denso ignition coils are manufactured to meet strict quality standards and OEM specifications. The 673-4021 part undergoes rigorous testing to ensure reliable performance and durability. Warranty coverage details should be confirmed with the distributor or manufacturer, as they may vary by region.