NGK 4469 Spark Plug - Intake Side

NGK Iridium IX Spark Plug 4469 Overview

NGK Iridium IX Spark Plug 4469 is built for direct-fit ignition service across a wide range of Chrysler, Dodge, Jeep, Ram, Nissan, Toyota, and other applications. It uses an iridium center electrode, copper core, and a 5,000-ohm resistor to support stable spark delivery and consistent engine operation.

Part number 4469, also identified as LFR5AIX-11, is part of NGK’s Iridium IX Spark Plug line, which focuses on OE-style fitment with iridium electrode construction for dependable ignition performance. This plug is a practical choice for drivers servicing vehicles such as the Toyota 4Runner, Ram 1500, and Jeep Grand Cherokee.

Key Features

• Iridium center electrode tip material for precise spark delivery
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode with taper cut tip design
• 5,000-ohm resistor for ignition system noise suppression
• Flat seat design with 14.00 mm thread diameter and 5/8 hex size
• Pre-gapped at .044 inches for many listed applications
• NGK Iridium IX Spark Plug line for OE-style replacement service

Detailed Product Description

NGK 4469 is an iridium spark plug engineered for secondary ignition systems that require a flat-seat plug with a 26.5 reach and a manufacturer heat range of 5. The iridium tip helps maintain a consistent firing point, while the copper core supports thermal control under everyday driving and load conditions. The standard ground configuration and taper cut ground electrode tip are matched to the plug’s OE-style application coverage.

Fitment coverage includes long-tail search applications such as Fits 2021-2025 Dodge Durango, N/A; Fits 2021-2024 Jeep Grand Cherokee L, N/A; Fits 2022-2024 Ram 1500, N/A; Fits 2021-2024 Toyota 4Runner, N/A; and Fits 2014-2023 Jeep Cherokee, N/A. The part number 4469 is also referenced as LFR5AIX-11, which helps when cross-checking catalog listings for the same application.

This part cross-references Monroe Shocks & Struts (e.g., 5617) for the same application.

What This Spark Plug Helps Address

• Rough idle caused by worn or fouled spark plugs
• Hard starting related to weak ignition output
• Misfire conditions from degraded plug electrodes
• Reduced throttle response from inconsistent spark delivery
• Service replacement needs on high-mileage ignition systems

Installation Notes and Tips

Verify the vehicle’s required gap before installation. Many listed applications use a .044-inch gap, while some fitments call for .047 inches or specific intake-side settings on dual-plug engines. Confirm the exact year, engine configuration, and position notes before installing NGK 4469 on Ram, Jeep, Nissan, or Toyota applications.

Use the vehicle service information for torque and gap verification, especially on applications with dual-plug or intake-side requirements. Confirm the plug’s flat seat, thread diameter, reach, and hex size match the original specification before installation.

Quality Assurance

NGK is a major OE spark plug supplier in North America with more than 80 years of automotive manufacturing experience. The brand’s OE-focused production standards and broad vehicle coverage support consistent quality across domestic and import applications.