NGK 1989 Spark Plug

NGK Laser Iridium Spark Plug 1989

NGK Laser Iridium Spark Plug 1989 is an OE-style ignition component built for precise spark delivery and stable engine performance. It uses an iridium center electrode, nickel ground electrode, and a 5,000 ohm resistor to support consistent ignition in modern fuel-injected engines.

The Laser Iridium line focuses on OE-level fit and durability, with a fine-wire iridium tip and a standard ground configuration for dependable combustion control. This part number 1989 is listed for select Smart Fortwo, Mitsubishi Outlander, and Kia Soul applications.

Key Features

• Laser Iridium spark plug with iridium center electrode tip material
• 5,000 ohm resistance for ignition system noise control
• Standard ground electrode tip design and standard ground configuration
• Copper center electrode core material for efficient heat transfer
• Flat seat type with 12.00 mm thread diameter and 5/8 hex size
• Manufacturer heat range 7 with a pre-gap size of .032
• OE-focused design from NGK, a major original equipment spark plug supplier

Product Details

NGK part number 1989, also identified as ILKR7B8, is a Laser Iridium spark plug engineered for vehicles that call for a 12 mm, flat-seat plug with a .032 gap specification. It is listed for 2008-2015 Smart Fortwo, 2007-2013 Mitsubishi Outlander, and 2010-2011 Kia Soul applications. For Mitsubishi Outlander service, the notes specify a .032 inch gap, actual OE manufacturer, and a 105,000-mile OE manufacturer recommended service interval. For Smart Fortwo, the notes specify a 0.036 inch gap. For Kia Soul, adjust the spark plug gap to 0.032 inches.

NGK’s Laser Iridium product line is built around OE standards and broad vehicle coverage, making it a practical choice for drivers replacing worn plugs in the Smart Fortwo, Mitsubishi Outlander, or Kia Soul. This part cross-references Anchor 3441 and 9407 for the same application.

Common Issues This Part Can Address

• Rough idle caused by worn or fouled spark plugs
• Hard starting from weak or inconsistent spark output
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from degraded ignition performance
• Fuel economy loss tied to inefficient combustion

Installation Notes and Tips

Verify the vehicle’s required gap before installation and set the plug to the application-specific specification listed in the fitment notes. Use the correct 5/8-inch spark plug socket and confirm the flat seat style matches the cylinder head specification. Check the ignition system condition before installation, and follow the vehicle service manual for torque and replacement intervals.

Quality Assurance

NGK is a long-established OE spark plug supplier with manufacturing and distribution operations supporting domestic and import vehicle coverage in North America. Part number 1989 is produced to OE-style standards for durability and consistent ignition performance.

Compatible With

• Fits 2008-2015 Smart Fortwo, N/A
• Fits 2007-2013 Mitsubishi Outlander, N/A
• Fits 2010-2011 Kia Soul, N/A