NGK 2397 Spark Plug

NGK Standard Spark Plug 2397 Overview

NGK Standard Spark Plug 2397 is an OE-style ignition component built for specific Volkswagen, Audi, and Mercedes-Benz applications that call for a 0.040 in. gap and a flat-seat design. It uses a copper center electrode with nickel tip materials and a semi-surface discharge ground design to support consistent spark delivery in the correct factory-style application.

The NGK Standard Spark Plug line focuses on original-equipment fit and dependable service for everyday driving. Part number 2397, also identified as BKUR6ET-10, is specified for a range of Audi A4, Audi A6, Volkswagen Beetle, Volkswagen Golf, Volkswagen Jetta, and Mercedes-Benz C230 applications.

Key Features

• NGK Standard Spark Plug, part number 2397
• OE-style design for factory-matched ignition service
• 0.040 in. pre-gap for listed applications
• Copper center electrode core material with nickel tip
• Nickel ground electrode core material
• Semi-surface discharge ground electrode design
• Flat seat type with 14 mm thread diameter and 5/8 in. hex
• Non-removable nut terminal
• Manufacturer heat range 6
• Cross-reference: DENSO Auto Parts 5061

Detailed Description

NGK 2397 is a standard spark plug engineered for vehicles that require the BKUR6ET-10 specification. The plug’s copper core and nickel electrode materials are selected for stable ignition performance in the listed OE-equivalent applications, while the semi-surface discharge ground configuration supports the factory-style combustion setup used in these engines. This part is a direct service choice for drivers maintaining Audi A4, Audi A6, Volkswagen Beetle, Volkswagen Golf, Volkswagen Jetta, and Mercedes-Benz C230 ignition systems.

Compatible With 1992-1994 Audi 100 and 100 Quattro, 1993-1995 Audi 90 Quattro, 1994-1995 Audi 90, 1994 Audi Cabriolet, 1995-1997 Audi A6, 1997 Audi A4, A4 Quattro, A6 Quattro, and Cabriolet, 1998 Audi A4 and Cabriolet, 1999-2001 Volkswagen Beetle, Golf, and Jetta, 2000-2001 Volkswagen Golf, 2003 Volkswagen Beetle, and 1999-2000 Mercedes-Benz C230. This part cross-references DENSO Auto Parts 5061 for the same application.

What It Helps Address

• Rough idle caused by worn spark plugs
• Hard starting from weak or inconsistent spark output
• Misfire conditions tied to incorrect plug gap or wear
• Reduced fuel economy from degraded ignition performance
• Loss of throttle response in aging ignition service intervals

Installation Notes and Tips

Verify the engine application and plug specification before installation. Confirm the listed 0.040 in. gap and use the correct torque procedure for the cylinder head material. Inspect ignition wires or coil components during service, and replace plugs according to the vehicle’s recommended maintenance interval, which is listed as 20,000 to 40,000 miles depending on application.

Quality Assurance

NGK is a long-established OE supplier and manufacturer with broad coverage across domestic and import vehicles in North America. Part number 2397 is produced to support original-equipment standards for durability and operational performance in the applications listed above.