Denso 673-4029 Direct Ignition Coil

Denso 673-4029 Ignition Coil Overview

The Denso 673-4029 direct ignition coil is a 12-volt coil on plug replacement built for consistent spark delivery in modern Nissan and INFINITI engines. It is a black ignition coil designed for direct-fit service on a wide range of applications, including Nissan Maxima, Murano, Pathfinder, Altima, Quest, 350Z, and INFINITI QX60, Q50, Q70, EX35, FX35, G25, G35, JX35, M35, and M35h.

DENSO’s Coil on Plug line focuses on stick-coil technology with controlled testing and inspection at the manufacturing level. The 673-4029 follows that product-line approach for drivers replacing a worn ignition coil on plug with an OE-style direct ignition coil.

Key Features

• Direct ignition coil for coil-on-plug applications
• 12-volt electrical specification
• Black housing
• OE-style replacement for select Nissan and INFINITI vehicles
• Part number 673-4029 for catalog and service matching

Detailed Description

This Denso ignition coil is built for vehicles that use a coil-on-plug ignition system, where the coil mounts directly to the spark plug. It is listed for 2023-2007 model years across multiple Nissan and INFINITI platforms, including Fits 2022-2023 INFINITI QX60, N/A; Fits 2022-2023 Nissan Maxima, N/A; Fits 2020-2023 Nissan Murano, N/A; and Fits 2022-2023 Nissan Pathfinder, N/A. The 673-4029 also cross-references Standard Ignition UF550 for the same application.

Use this coil when servicing ignition systems that need stable voltage transfer and reliable spark output in a direct ignition setup. The Denso 673-4029 is a practical replacement choice for Nissan Maxima, Murano, Pathfinder, Altima, and related INFINITI models where coil-on-plug service is specified.

What It Helps Fix

• Engine misfire codes related to ignition coil failure
• Rough idle or uneven engine operation
• Hard starting caused by weak spark output
• Loss of acceleration response from inconsistent ignition performance
• Check engine light conditions tied to coil-on-plug faults

Installation Notes and Tips

• Verify the part number and connector style before installation.
• Inspect spark plugs, boots, and wiring for wear before replacing the coil.
• Clear diagnostic trouble codes after repair and confirm proper engine operation.
• Use the vehicle’s service information for torque and removal procedures.

Quality Assurance

DENSO backs this Coil on Plug product line with controlled testing and inspection processes used to support ignition coil quality and consistency. The 673-4029 is a direct ignition coil replacement for select Nissan and INFINITI applications.