NGK 91112 Spark Plug

NGK Laser Iridium Spark Plug for Mitsubishi

NGK 91112 is a Laser Iridium High Ignitability spark plug built for precise ignition performance and OE-style durability. It is listed for select Mitsubishi Outlander PHEV applications, including 2018-2022 models, and matches the factory service interval requirements noted in the fitment data.

Key Features

• Laser Iridium center electrode tip for stable spark delivery
• High ignitability design for consistent combustion response
• 0.043 in. pre-gap size
• 14 mm thread diameter with 0.75 in. reach
• Flat seat design with stud terminal type
• 5000 ohm resistor for ignition system noise control
• Nickel ground electrode with copper core center electrode
• NGK part number 91112, manufacturer reference DIFR5E11

Product Details

NGK’s Laser Iridium High Ignitability line is built around fine-wire iridium center electrode technology and OE-focused construction for modern engines that require accurate spark timing and dependable combustion. For Mitsubishi Outlander PHEV service, NGK 91112 supports the factory-recommended maintenance interval and the high ignitability specification called out for 2018-2022 vehicles. This spark plug is also cross-referenced to Dorman - HELP 91112 for the same application.

What This Spark Plug Helps Address

• Hard starting caused by worn or fouled spark plugs
• Misfire conditions related to weak ignition output
• Rough idle from inconsistent spark delivery
• Reduced throttle response from degraded plug performance
• Service replacement needs at the factory maintenance interval

Installation Notes and Tips

Verify the vehicle’s engine specification and service interval before installation. The listed pre-gap is 0.043 in., and the fitment notes for 2018-2020 Mitsubishi Outlander PHEV specify a 0.044 in. OE gap reference, so confirm the required gap against the vehicle service information before use. Use proper spark plug removal and installation procedures to avoid thread damage in the cylinder head.

Fits 2018-2020 Mitsubishi Outlander PHEV, N/A. Fits 2021-2022 Mitsubishi Outlander PHEV, N/A.

Quality Assurance

NGK is a long-established OE supplier and manufacturer of spark plugs for domestic and import vehicles in North America, with broad coverage across automotive, motorcycle, marine, and small engine applications. NGK 91112 is built to OE standards for durability and operational performance, making it a direct service part for Mitsubishi Outlander PHEV maintenance.