NGK 1311 Spark Plug

NGK Laser Iridium Spark Plug for Mitsubishi

NGK 1311 is a Laser Iridium High Ignitability spark plug built for direct OE-style service on select Mitsubishi applications. It uses an iridium center electrode, a dual fine electrode high-ignitability ground design, and a 0.044 in. pre-gap to support consistent ignition performance in the vehicles listed below.

As part of NGK’s Laser Iridium High Ignitability line, this plug is engineered around OE fitment requirements and factory service intervals for Mitsubishi Outlander Sport, RVR, Lancer, and Outlander applications. Part number 1311 is also identified as DIFR5C11.

Key Features

• Laser Iridium High Ignitability spark plug for OE-style replacement service
• Iridium center electrode tip with copper core for stable ignition performance
• Dual fine electrode ground design with nickel core
• 0.044 in. pre-gap, 14 mm thread diameter, 0.75 in. reach
• 5/8 in. hex size and flat seat design
• 5000 ohm resistance and non-removable nut terminal
• NGK part number 1311, manufacturer number DIFR5C11

Product Details

NGK 1311 is a spark plug for drivers servicing Mitsubishi engines that call for a high-ignitability OE replacement. The iridium tip helps maintain a precise firing edge, while the dual fine electrode ground configuration supports reliable spark delivery under normal combustion demands. This makes it a direct-fit choice for Mitsubishi Outlander Sport, Mitsubishi RVR, Mitsubishi Lancer, and Mitsubishi Outlander models listed in the fitment data.

NGK is a long-standing OE supplier in North America with broad coverage across domestic and import vehicles. That OE background is reflected in the construction of this plug, which is built to meet factory-style specifications for thread size, reach, seat type, and gap. If you are searching for NGK 1311 spark plug fitment for a 2011-2017 Mitsubishi Lancer or a 2015-2020 Mitsubishi Outlander Sport, this part matches the listed application requirements.

This part cross-references Hygrade Tuneup 1311 for the same application.

What It Helps Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition output
• Misfire conditions related to plug wear or gap drift
• Reduced throttle response from aging ignition components
• Service replacement needs at the factory-recommended interval

Installation Notes and Tips

Verify engine application against the fitment list before installation. This plug uses a 0.044 in. pre-gap, so confirm the engine specification matches the listed OE requirement before use. Check thread diameter, reach, seat type, and hex size during service to ensure proper fit. For Mitsubishi Outlander Sport, RVR, Lancer, and Outlander applications, follow the vehicle manufacturer’s service procedure and torque specification.

• Fits 2021-2024 Mitsubishi Outlander Sport, N/A
• Fits 2021-2024 Mitsubishi RVR, N/A
• Fits 2015-2020 Mitsubishi Outlander Sport, N/A; OE spark plug is high ignitability; gap 0.044 in.; 105,000 mi OE manufacturer recommended service interval
• Fits 2015-2020 Mitsubishi RVR, N/A; OE spark plug is high ignitability; gap 0.044 in.; 105,000 mi OE manufacturer recommended service interval
• Fits 2011-2017 Mitsubishi Lancer, N/A; OE spark plug is high ignitability; gap 0.044 in.; 105,000 mi OE manufacturer recommended service interval
• Fits 2011-2013 Mitsubishi Outlander, N/A; OE spark plug is high ignitability; gap 0.044 in.; 105,000 mi OE manufacturer recommended service interval

Quality Assurance

NGK manufactures ignition components to OE standards and supplies spark plugs for a wide range of automotive applications in North America. Part number 1311 is built to the listed specifications for consistent service on the confirmed Mitsubishi fitments.