NGK 4708 Spark Plug

NGK Laser Iridium Spark Plug 4708

NGK Laser Iridium Spark Plug 4708 is built for drivers who want OE-style ignition performance with precise electrode construction and stable electrical resistance. This spark plug uses an iridium center electrode, a nickel ground electrode, and a 0.040 pre-gap to support consistent spark delivery in the correct application.

The Laser Iridium line focuses on durable ignition performance and original-equipment standards. NGK’s long OE supply background and broad coverage across domestic and import vehicles make this plug a practical choice for routine maintenance on vehicles such as Honda Civic and Toyota Corolla applications where the correct heat range and thread specifications matter.

Key Features

• NGK Laser Iridium spark plug, part number 4708
• Iridium center electrode tip for precise spark delivery
• Nickel ground electrode with standard configuration and taper cut tip design
• 5000 resistance rating for ignition system compatibility
• Pre-gapped to 0.040 for the specified application
• Flat seat design, 10.00 mm thread diameter, 0.75 reach, and 5/8 hex size
• Manufacturer heat range 8 with stud terminal type
• Cross-reference: DENSO Auto Parts 09482-00597

Detailed Description

NGK 4708 is a Laser Iridium spark plug engineered around OE-style dimensions and materials, including a copper core center electrode, iridium tip material, and a nickel ground electrode core. The 10.00 mm thread diameter, 0.75 reach, flat seat, and 5/8 hex size are important fitment details for vehicles that call for this exact plug specification. For Honda Civic and Toyota Corolla maintenance, matching these dimensions helps ensure the plug seats correctly and operates as intended in the ignition system.

As part of NGK’s Laser Iridium product line, this plug is aimed at applications that require stable ignition performance and durable electrode construction. The part number 4708 is also identified as CR8EIA-10, which can help when cross-checking service information or ordering by alternate reference.

What It Helps Address

• Rough idle caused by worn or fouled spark plugs
• Hard starting from weak or inconsistent spark output
• Misfire conditions tied to incorrect plug gap or worn electrodes
• Reduced throttle response from degraded ignition performance
• Maintenance replacement for specified Honda Civic and Toyota Corolla ignition service

Installation Notes and Tips

Verify the engine’s required thread diameter, reach, seat type, heat range, and terminal style before installation. Use the specified 0.040 gap only when it matches the vehicle application, and confirm the plug is tightened to the manufacturer’s service specification. For Honda Civic and Toyota Corolla service, compare the old plug’s part number and dimensions against NGK 4708 before installation.

Quality Assurance

NGK is a long-standing OE supplier with extensive North American coverage for domestic and import vehicles. The Laser Iridium line is built to original-equipment standards for durability and operational consistency, and part number 4708 is supported by NGK’s established manufacturing and distribution network.