Denso 673-4030 Direct Ignition Coil

Denso 673-4030 Ignition Coil Overview

The Denso 673-4030 direct ignition coil is a 12-volt coil on plug replacement built for Nissan and INFINITI applications that use stick coil ignition. It supports consistent spark delivery for vehicles such as the Nissan Armada, Nissan TITAN, Nissan Pathfinder, and INFINITI QX56.

As part of Denso’s Coil on Plug line, this ignition coil reflects the brand’s focus on OE-style fit and validated ignition performance for late-model truck and SUV applications.

Key Features

• Direct ignition coil for coil-on-plug systems
• 12-volt electrical specification
• Black housing
• OE-style replacement for select Nissan and INFINITI engines
• Part number: 673-4030

Detailed Product Description

Denso 673-4030 is a direct ignition coil engineered for vehicles equipped with coil-on-plug ignition, where each coil mounts directly to the spark plug. This design supports stable ignition output and precise spark control in applications including the 2008-2015 Nissan Armada, 2008-2015 Nissan TITAN, 2008-2012 Nissan Pathfinder, and 2008-2010 INFINITI QX56. It also fits 2007 Nissan Armada, 2007 Nissan TITAN, and 2007 INFINITI QX56 built from 08/2006, plus 2012-2017 Nissan NV2500 and NV3500 models with coil-on-plug ignition.

The Denso Coil on Plug line is known for careful testing and inspection during production, helping ensure consistent ignition coil quality for demanding truck and SUV service. If you are replacing a failing Nissan Armada ignition coil or a Nissan TITAN coil on plug unit, Denso 673-4030 provides a direct-fit service part for the listed applications.

This part cross-references NGK U5296 for the same application.

Common Issues This Part Can Help Resolve

• Engine misfire under load
• Rough idle caused by weak ignition output
• Hard starting related to coil failure
• Check engine light from ignition coil fault codes
• Loss of power or hesitation during acceleration

Installation Notes and Tips

Verify the vehicle’s engine and build date before ordering, especially for 2007 and 2017 models with date-specific fitment notes. Confirm the original coil connector style and coil-on-plug configuration before installation. Inspect spark plugs and related ignition components during replacement to help prevent repeat coil stress.

Quality Assurance

Denso applies controlled testing and inspection processes to this ignition coil line to support consistent quality and fit for the listed Nissan and INFINITI applications. Part number 673-4030 is built as a direct ignition coil replacement for coil-on-plug systems.