NGK 49045 Ignition Coil

NGK HEI Ignition Coil for Nissan and Infiniti

The NGK HEI Ignition Coil, part number 49045, is built for electronic ignition systems that need stable voltage delivery and consistent spark output. It is a direct-fit ignition coil for a wide range of Nissan, Infiniti, and Mercury applications, including Nissan Maxima, Sentra, Pathfinder, 240SX, and INFINITI G20 models.

NGK’s HEI ignition coil line is developed to meet or exceed OE standards, with testing performed under demanding conditions in an ISO 17025 accredited lab. That focus on durability and electrical performance makes this coil a practical choice for drivers servicing older import vehicles that rely on dependable ignition operation.

Key Features

• 12-volt ignition coil for electronic ignition systems
• HEI coil design for OE-style ignition performance
• Blade terminals with 2-terminal configuration
• Female connector and male terminal layout
• Oil-filled: No
• Mounting bracket included: No
• NGK part number 49045 / U1024

Detailed Description

This NGK ignition coil is engineered for vehicles using an HEI-style ignition setup and is suited for late-model domestic and import coverage. It supports direct replacement service on applications such as 1989-1994 Nissan Maxima, 1989-1994 Nissan Sentra, 1990-1995 Nissan Pathfinder, 1989-1990 Nissan 240SX, 1991-1996 INFINITI G20, and 1993-1998 Nissan Quest. The part number 49045 is also referenced as U1024 in NGK cataloging.

This part cross-references Delphi GN10024 and Standard Ignition UF-38 for the same application. NGK’s manufacturing and validation process is centered on OE-level durability and operational consistency, making this coil a solid service replacement for ignition systems that need reliable voltage transfer and spark control.

What It Helps Fix

• Hard starting caused by weak ignition output
• Misfires related to coil breakdown
• Rough idle from inconsistent spark delivery
• Stalling tied to ignition coil failure
• Poor acceleration from unstable ignition performance

Installation Notes and Tips

Verify connector style, terminal count, and ignition type before installation. This coil uses a female connector, male terminals, and a blade-style terminal layout, so matching the original electrical connection is important. Confirm vehicle-specific fitment for the exact year and model, especially on Nissan Pickup applications with the 2/1996 cutoff noted in the catalog data.

For best results, inspect related ignition components such as plugs, wires, and connectors during service. The NGK HEI Ignition Coil is listed for multiple Nissan and INFINITI applications, including Nissan Maxima, Sentra, and Pathfinder, so confirming the exact vehicle configuration helps ensure proper replacement.

Quality Assurance

NGK manufactures ignition coils to meet or exceed OE standards and validates designs in an ISO 17025 accredited test lab under severe operating conditions. That engineering approach supports consistent performance across the broad vehicle coverage associated with part number 49045.