NGK 2522 Spark Plug

NGK BUHX 2522 Spark Plug Overview

The NGK Standard Spark Plug BUHX 2522 is built for ignition systems that call for a surface discharge design with a flat seat and 14 mm thread diameter. It uses a copper center electrode core with nickel tip materials and a nickel ground electrode core for consistent spark delivery in the correct heat range.

As part of NGK’s Standard Spark Plug line, this plug reflects the brand’s OE-focused approach to everyday ignition service. It is a practical choice for drivers and technicians looking for a direct replacement spark plug for vehicles such as Honda Civic and Toyota Corolla applications where the specified plug design matches the engine requirements.

Key Features

• NGK Standard Spark Plug, part number 2522
• Surface discharge ground electrode design
• Flat seat construction with 14 mm thread diameter
• Copper center electrode core for stable conductivity
• Nickel center and ground electrode tip materials
• Pre-gapped to .030 for specified applications
• 13/16 hex size and non-removable nut terminal
• Manufacturer heat range 12

Detailed Product Description

The NGK BUHX 2522 spark plug is engineered for ignition systems that require a surface discharge configuration and a .5 reach. Its copper-core center electrode supports reliable electrical transfer, while the nickel tip materials and nickel ground core align with standard OE-style service requirements. The 1 ohm resistance specification helps maintain proper ignition circuit performance where this plug is specified.

NGK has long supplied spark plugs for domestic and import vehicles, along with motorcycle, marine, and small engine applications. That OE background is reflected in the BUHX 2522, making it a solid service part for maintenance on vehicles such as Honda Civic and Toyota Corolla when the engine calls for this exact plug design. This part cross-references Champion Spark Plug 824 for the same application.

Common Issues This Spark Plug Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition firing
• Misfire conditions related to degraded plug electrodes
• Reduced throttle response from weak spark delivery
• Maintenance replacement for plugs at service interval

Installation Notes and Tips

Verify the engine calls for a surface discharge, flat-seat spark plug with 14 mm thread diameter, .5 reach, and .030 pre-gap before installation. Check the ignition system specification for the correct heat range and terminal style, and confirm the plug matches the vehicle’s required application before service. For Honda Civic and Toyota Corolla fitment searches, always compare the engine code and plug specification to the original part.

Quality Assurance

NGK manufactures spark plugs to original equipment standards and supports a broad range of domestic and import vehicle applications. The BUHX 2522 is backed by NGK’s long-standing OE supply experience and global manufacturing and distribution network.