NGK 6205 Spark Plug

NGK Laser Iridium Spark Plug 6205 Overview

NGK Laser Iridium Spark Plug 6205 is a direct-fit ignition component built around an iridium center electrode, a nickel ground electrode, and a 5,000-ohm resistor for stable spark delivery. It is a practical choice for drivers searching for an NGK spark plug for Honda Civic or Toyota Corolla service, especially when replacing worn plugs in secondary ignition maintenance.

The Laser Iridium line focuses on OE-style construction and precise electrode design. Part number 6205, also identified as LKAR9BI9, uses a 0.036 in pre-gap, a 12 mm thread diameter, a 14 mm hex, a flat seat, and a 26.5 mm reach for applications that call for this specification.

Key Features

• Iridium center electrode tip for consistent ignition performance
• Nickel ground electrode with standard configuration and tip design
• 5,000-ohm resistor for electrical noise suppression
• 0.036 in pre-gap for OE-style service replacement
• 12 mm thread diameter, 14 mm hex, flat seat, and 26.5 mm reach
• NGK Laser Iridium Spark Plug line for OE-focused ignition service
• Part number 6205 / LKAR9BI9 for catalog matching

Detailed Description

NGK 6205 is engineered as a Laser Iridium spark plug for vehicles that specify this plug geometry and heat range. The iridium tip supports precise spark delivery, while the copper core center electrode and nickel ground electrode help maintain dependable ignition characteristics under normal engine operating conditions. With a manufacturer heat range of 9, this plug is suited to applications that require that exact thermal specification.

For fitment-based searches, this NGK spark plug 6205 is the type of replacement part shoppers look for when servicing Honda Civic and Toyota Corolla ignition systems that call for LKAR9BI9. It is also a relevant search match for drivers comparing NGK 6205 spark plug specs, 12 mm thread spark plugs, and flat-seat iridium plugs for OE replacement maintenance.

What It Helps Address

• Misfires caused by worn or fouled spark plugs
• Hard starting from degraded ignition performance
• Rough idle related to inconsistent spark delivery
• Reduced fuel economy from inefficient combustion
• Loss of throttle response from aging secondary ignition components

Installation Notes and Tips

Verify the engine calls for part number 6205 or LKAR9BI9 before installation. Confirm thread diameter, reach, seat type, heat range, and pre-gap against the vehicle service specification, then inspect the ignition coil, boots, and plug wells for wear or contamination before final assembly. Use proper spark plug handling practices to avoid damaging the iridium tip or altering the preset gap.

For vehicle-specific ordering, confirm the exact application in the catalog before purchase. This part cross-references Hayden 6205 for the same application.

Quality Assurance

NGK is a long-established OE supplier and manufacturer serving domestic and import vehicle applications across North America. The brand’s manufacturing and distribution network supports consistent product standards for ignition service, and part number 6205 reflects NGK’s OE-oriented approach to spark plug replacement.