NGK 4563 Spark Plug

NGK Standard Spark Plug 4563 Overview

NGK Standard Spark Plug 4563 is a copper-core, nickel-tipped spark plug built for stable ignition performance in a wide range of domestic and import applications. It uses a flat seat, 14 mm thread diameter, 5/8 hex, and a pre-gap of .036 for straightforward OE-style service replacement.

As part of NGK’s Standard Spark Plug line, this plug reflects the brand’s long OE supply background and focus on original equipment specifications. It is a practical choice for drivers servicing vehicles such as Honda Civic and Toyota Corolla applications where a conventional replacement spark plug is required.

Key Features

• Part number 4563, also identified as BCP6ET
• Copper center electrode core with nickel center electrode tip
• Nickel ground electrode tip with standard ground configuration
• 3 ground electrodes for consistent spark exposure
• 1 ohm resistance for ignition system compatibility
• Flat seat design with 14 mm thread diameter and .75 reach
• Removable nut terminal for common ignition wire and coil connections
• Manufacturer heat range 6 and pre-gap size of .036

Detailed Description

NGK 4563 is a standard replacement spark plug engineered around proven OE-style construction. The copper core helps support dependable heat transfer, while the nickel electrode materials and standard ground design provide a familiar service part format for routine tune-ups and ignition maintenance. The BCP6ET designation and 5/8 hex size make it easy to match against catalog references when servicing vehicles that call for this specification.

This spark plug cross-references Bosch F6DTC for the same application. It is commonly searched for as an NGK spark plug for Honda Civic and Toyota Corolla service, especially when replacing worn plugs in vehicles that require a flat-seat, 14 mm plug with a .036 gap.

Common Issues This Part Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition firing
• Misfire conditions related to electrode wear
• Reduced throttle response from weak spark delivery
• Maintenance replacement for high-mileage ignition service

Installation Notes and Tips

Verify the thread diameter, reach, seat type, and heat range against the vehicle’s service specifications before installation. Check the gap before use and confirm the ignition terminal style matches the existing wire or coil connection. For best results, install on a cool engine and follow the manufacturer’s torque specification for the cylinder head material.

Quality Assurance

NGK is a major OE supplier in North America with decades of spark plug manufacturing experience across automotive, motorcycle, marine, and small engine applications. The Standard Spark Plug line is built to original equipment standards for dependable service and consistent operation.