NGK 4764 Spark Plug

NGK Laser Platinum Spark Plug for Mazda RX-7

The NGK Laser Platinum Spark Plug, part number 4764, is built for specific Mazda RX-7 applications that call for a surface-discharge plug with platinum center electrode construction. It supports consistent ignition performance in 1986-1991 and 1993-1995 Mazda RX-7 models, including leading plug positions noted in the fitment data.

Key Features

• Laser Platinum spark plug from NGK’s Laser Platinum product line
• Part number 4764, also identified as BUR7EQP
• Platinum center electrode tip with copper core for stable spark delivery
• Nickel ground electrode core material
• Surface discharge ground electrode design
• 5000 ohm resistance
• Pre-gapped at 0.056 in.
• 14.00 mm thread diameter, 21.5 reach, 13/16 hex size
• Flat seat and non-removable nut terminal
• Manufacturer heat range 7

Product Details

NGK’s Laser Platinum line is positioned for OE-style ignition service, combining platinum tip durability with application-specific engineering. This spark plug is listed for Mazda RX-7 models from 1986-1991 and 1993-1995, with fitment notes calling out leading positions and a 0.056 in. gap. The 4764 spark plug is a direct-reference choice for owners servicing the rotary ignition system on the Mazda RX-7, where correct heat range, reach, and electrode design matter for reliable combustion.

This part cross-references AMS Automotive 4764 for the same application.

Common Issues This Part Can Address

• Hard starting caused by worn or fouled spark plugs
• Misfire from excessive electrode wear or incorrect gap
• Rough idle and inconsistent combustion in rotary engine service
• Reduced throttle response from weak ignition output
• Maintenance replacement for Mazda RX-7 leading plug applications

Installation Notes and Tips

Verify the vehicle year and engine application before installation. Confirm the plug gap matches the listed 0.056 in. specification and inspect the ignition system for wear before installing new plugs. Use the correct 13/16 hex socket and tighten to the vehicle manufacturer’s torque specification. For Mazda RX-7 service, follow the recommended plug position and service interval noted for the application.

Quality Assurance

NGK is a long-established OE supplier and manufacturer with broad coverage across domestic and import applications. The brand’s manufacturing focus on original equipment standards supports consistent fit, durability, and operational performance for ignition service.