NGK 90299 Spark Plug

NGK Standard Spark Plug 90299 Overview

NGK Standard Spark Plug 90299 is a direct ignition service part built around NGK’s OE-focused spark plug design. It uses a copper center electrode, nickel center electrode tip, and nickel ground electrode components to support consistent spark delivery in a wide range of domestic and import applications, including Honda Civic and Toyota Corolla service needs where the correct heat range and gap matter.

Part number 90299 is also identified as MR8F and features a 5,000 ohm resistor, .032 pre-gap, flat seat, 10 mm thread diameter, and 5/8 hex size for applications that call for this specification set.

Key Features

• NGK Standard Spark Plug, part number 90299
• MR8F cross-reference identification
• 5000 ohm resistor for ignition system noise control
• Copper center electrode core with nickel tip materials
• Nickel ground electrode with standard configuration
• .032 pre-gap size for specified applications
• Flat seat, 10 mm thread diameter, .75 reach, 5/8 hex
• Manufacturer heat range 8

Detailed Description

NGK builds this Standard Spark Plug line as an OE-style service option backed by decades of ignition-system manufacturing experience. The 90299 spark plug is specified with a non-removable nut terminal, single ground electrode, and standard ground tip design, making it a straightforward replacement when the engine calls for these exact dimensions and electrical characteristics. For drivers searching for an NGK spark plug 90299, MR8F spark plug, or a standard replacement spark plug for Honda Civic and Toyota Corolla maintenance, this part provides the core specifications needed for proper ignition performance.

This part cross-references Monroe Shocks & Struts (e.g., 3022809) for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent spark delivery
• Misfire conditions tied to incorrect plug wear or gap
• Reduced throttle response from degraded ignition performance
• Maintenance replacement for vehicles requiring the MR8F specification

Installation Notes and Tips

Verify the engine calls for a 10 mm thread, .75 reach, flat seat, and .032 gap before installation. Check the existing plug specification against the vehicle service information for Honda Civic, Toyota Corolla, or other listed applications, and confirm the heat range matches the engine requirement. Use proper torque procedures and inspect the ignition coil, plug wire, or boot condition during service to help avoid repeat misfire concerns.

Quality Assurance

NGK is a major OE spark plug supplier in North America and manufactures ignition components for domestic and import vehicles, motorcycles, marine engines, and small engines. Part number 90299 reflects that OE-oriented manufacturing approach with standardized dimensions and materials for service replacement use.