NGK 6341 Spark Plug

NGK Iridium IX Spark Plug 6341

NGK Iridium IX Spark Plug 6341 is built for drivers who want stable ignition performance, precise gap control, and OE-style fitment across a wide range of import and domestic applications. This spark plug uses an iridium center electrode, a nickel ground electrode, and a 5,000-ohm resistor to support consistent firing and reduced electrical noise.

Key Features

• Iridium center electrode tip for focused spark delivery
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode with taper-cut tip design
• Pre-gapped at 0.032 inches for many listed applications
• 5/8-inch hex, 14 mm thread diameter, 0.75-inch reach, flat seat
• Non-removable nut terminal for standard ignition connections
• NGK part number BKR5EIX, stock number 6341

Product Details

As part of the NGK Iridium IX Spark Plug line, this plug is engineered around a fine iridium firing tip and OE-equivalent construction. The design supports reliable ignition performance in vehicles that call for a 0.032-inch gap, while selected applications require different gap settings such as 0.028, 0.034, 0.035, 0.036, or 0.040 inches. The BKR5EIX / 6341 reference is commonly searched for fitment on vehicles such as the Toyota Corolla, Toyota Tacoma, Volkswagen Jetta, Mercedes-Benz E320, and Mitsubishi Lancer.

NGK is a long-standing OE supplier with broad coverage across automotive, motorcycle, marine, and small engine applications. That manufacturing background is reflected in the plug’s materials and dimensions, which are specified to match listed applications and support dependable secondary ignition service.

This part cross-references DENSO Auto Parts 5303 and Autolite XP3924 for the same application.

What It Helps Address

• Hard starting caused by worn or inconsistent spark plugs
• Misfire conditions related to weak ignition output
• Rough idle from degraded plug electrodes
• Reduced throttle response from aged secondary ignition components
• Maintenance replacement for OE-style spark plug service intervals

Installation Notes

• Verify the required gap for your exact vehicle before installation; listed applications vary by model and year.
• Use the application-specific gap noted in the fitment data, including 0.028, 0.032, 0.034, 0.035, 0.036, or 0.040 inches where specified.
• Confirm thread diameter, reach, seat type, and hex size match the original plug specification.
• Follow the vehicle manufacturer’s torque procedure during installation.
• Check ignition system condition if misfire symptoms remain after replacement.

Quality Assurance

NGK manufactures spark plugs to OE standards and supplies ignition components for a broad range of vehicles in North America and worldwide. The 6341 spark plug reflects that OE-focused engineering approach with materials and dimensions selected for listed applications.