NGK 3106 Spark Plug

NGK Laser Iridium Spark Plug for Mitsubishi Lancer

NGK 3106 is a Laser Iridium spark plug built for precise ignition performance and OE-style durability. It is listed for 2003-2005 Mitsubishi Lancer applications and uses an iridium center electrode with a copper core for stable spark delivery.

Key Features

• Laser Iridium spark plug from NGK
• Part number 3106, also identified as IGR7A-G
• Fits 2003-2005 Mitsubishi Lancer
• Pre-gapped at 0.028 inch
• Flat seat design with 14.00 mm thread diameter and 0.75 inch reach
• 13/16 inch hex size for standard service tools
• 5000 ohm resistance
• Single ground electrode with standard tip and configuration
• Iridium center electrode tip with copper core construction

Product Details

NGK 3106 is part of the Laser Iridium spark plug line, which focuses on fine-wire iridium construction for consistent ignition performance and long service life in OE-style applications. For Mitsubishi Lancer owners, this spark plug matches the listed 2003-2005 fitment and supports factory-style service requirements. The part number 3106 should be verified against the vehicle’s engine and service specification before installation.

This part cross-references Mitsubishi OE numbers such as MD374841 and S22PR-A7 for the same application.

Common Issues It May Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition output
• Misfire conditions related to aged plugs
• Reduced throttle response from weak spark delivery
• Service interval replacement on 2003-2005 Mitsubishi Lancer models

Installation Notes

Confirm the engine application and verify the pre-gap before installation. Use the correct 13/16 inch spark plug socket and follow the manufacturer’s torque specification for the engine. Inspect ignition coils, boots, and plug wells during service to help ensure proper operation after replacement.

Quality Assurance

NGK is a major OE supplier and manufacturer of spark plugs for domestic and import vehicles in North America, with more than 80 years of automotive experience. The brand’s manufacturing and distribution network supports OE-level standards for durability and operational performance.