NGK 49011 Ignition Coil

NGK COP Ignition Coil 49011 Overview

NGK ignition coil 49011 is a distributorless coil-on-plug ignition coil built to meet or exceed OE standards for durability and consistent performance. It is engineered for direct replacement use on select INFINITI applications, including M45, FX45, and Q45 models.

NGK’s COP ignition coil line focuses on precise ignition output, stable electrical connection, and dependable operation in modern coil-on-plug systems. Part number 49011 is backed by NGK’s long OE-focused manufacturing experience and testing practices.

Key Features

• 12-volt ignition coil for distributorless systems
• COP (coil-on-plug) design for direct spark delivery
• Blade terminal style with 3 terminals
• Female connector gender and male terminal gender
• Non-oil-filled construction
• No mounting bracket included
• OE-standard design and validation for late-model domestic and import coverage

Product Details

NGK 49011 is designed for vehicles that use a coil-on-plug ignition setup, where each coil mounts directly to the spark plug. This layout helps maintain consistent spark delivery and supports reliable engine operation in applications such as the 2003-2008 INFINITI FX45, 2002-2006 INFINITI Q45, and 2003-2004 INFINITI M45. It also fits 2006-2010 INFINITI M45. If you are replacing a failing ignition coil on an INFINITI M45, FX45, or Q45, this NGK COP Ignition Coil offers a direct-fit service part option.

This part cross-references Delphi GN10553 and DENSO Auto Parts 673-4026 for the same application.

Common Issues This Part Can Address

• Engine misfire under load or at idle
• Rough running or uneven acceleration
• Hard starting caused by weak ignition output
• Check engine light related to ignition coil performance
• Loss of power from inconsistent spark delivery

Installation Notes

Confirm connector style, terminal layout, and OE part match before installation. Inspect the spark plug, coil boot, and connector for heat damage, corrosion, or oil contamination before fitting the new coil. For best results, replace any worn spark plugs at the same time if service history is unknown.

Fitment includes 2006-2010 INFINITI M45, 2003-2004 INFINITI M45, 2003-2008 INFINITI FX45, and 2002-2006 INFINITI Q45. Part number 49011 should be matched to the vehicle’s original ignition coil specification.

Quality Assurance

NGK develops and tests ignition coils to OE-level standards using controlled lab validation methods, including extreme-condition testing in an ISO 17025 accredited environment. The brand’s OE heritage and broad vehicle coverage support confident replacement selection for ignition service.