NGK 3722 Spark Plug

NGK BR5HS Standard Spark Plug

The NGK BR5HS standard spark plug is built for reliable ignition performance in small-engine and vintage vehicle applications. It uses a copper center electrode core, nickel center and ground electrode tips, and a 5,000-ohm resistor to support stable spark delivery and reduced electrical interference.

Compatible with 1950-1953 Volkswagen Beetle applications, this NGK spark plug follows an OE-equivalent design with a flat seat, 14 mm thread diameter, 0.5 in. reach, and a pre-gap of 0.024 in. The BR5HS part number 3722 is a direct reference for buyers searching for a standard replacement spark plug for classic Volkswagen Beetle maintenance.

Key Features

• NGK Standard Spark Plug line for OE-style replacement needs
• Part number BR5HS / stock number 3722
• 5000-ohm resistor for ignition system noise suppression
• Copper core center electrode for consistent heat transfer
• Nickel center and ground electrode tips for standard-duty service
• Flat seat design with 14 mm thread diameter and 0.5 in. reach
• Pre-gapped to 0.024 in. for the listed application
• Compatible with 1950-1953 Volkswagen Beetle, N/A

Product Details

NGK’s Standard Spark Plug line focuses on original-equipment-style construction and broad application coverage across automotive, motorcycle, marine, and small-engine use. For the Volkswagen Beetle, the BR5HS 3722 matches the listed OE-equivalent design requirements, including a removable nut terminal, 13/16 hex size, heat range 5, and standard ground configuration. This makes it a practical choice for routine ignition service where correct thread size, reach, and seat type matter.

This part cross-references Autolite 425 and Champion Spark Plug 426 for the same application.

Common Issues This Part Can Help Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent spark delivery
• Misfire symptoms related to aged ignition components
• Reduced throttle response from degraded plug performance
• Ignition noise concerns in resistor-equipped systems

Installation Notes and Tips

Verify the thread diameter, reach, seat type, and heat range before installation. For the listed Volkswagen Beetle fitment, confirm the plug gap matches the engine specification and inspect the ignition wires, cap, and coil condition at the same time. Use proper torque during installation to protect the cylinder head and ensure correct sealing at the flat seat.

Quality Assurance

NGK is a long-established OE spark plug supplier with manufacturing and distribution operations in North America and worldwide. The BR5HS 3722 is produced to support original-equipment standards for durability and operational performance in the applications listed.