NGK 91613 Spark Plug

NGK Laser Iridium Spark Plug 91613

NGK 91613 is a Laser Iridium spark plug built for OE-style ignition performance and long service life. It is engineered for direct replacement use in select applications, including 2015-2017 Chevrolet Impala models, with a fine-wire iridium center electrode and a platinum ground tip for controlled wear.

Key Features

• Laser Iridium design with an iridium center electrode and platinum ground electrode tip
• Fine-wire center electrode for consistent spark delivery
• Resistor spark plug with 5,000 ohm resistance
• Pre-gapped to 0.036 in. (0.9 mm)
• Tapered seat, M14 x 1.25 thread, 25.0 mm reach
• Copper core and high-grade ceramic insulator for heat control
• 5/8 in. (16 mm) hex size

Product Details

NGK Laser Iridium spark plugs are built for OE applications where stable ignition, durability, and consistent starting matter. The iridium-tipped center electrode resists wear, while the platinum pad on the ground electrode helps promote even electrode wear in distributorless ignition systems. NGK 91613 also uses a copper core and pure alumina ceramic insulator to help manage heat and maintain reliable operation over time. This part cross-references AC Delco 41-132 and GM 92457960 for the same application.

Compatible With 2015-2017 Chevrolet Impala, N/A. The NGK 91613 spark plug is a direct-fit service part for this application and is commonly searched as a 2015-2017 Chevrolet Impala Laser Iridium spark plug replacement.

Common Issues This Part May Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition performance
• Misfire conditions related to plug wear or gap growth
• Reduced throttle response from weak spark delivery
• Service interval replacement on OE-recommended maintenance schedules

Installation Notes

Verify thread size, reach, seat type, and pre-gap before installation. NGK 91613 uses a tapered seat and non-removable terminal nut, so confirm the ignition coil or wire connection matches the terminal style. Follow the vehicle service manual for torque specification and installation procedure, and inspect the ignition system for oil, carbon tracking, or coil issues before fitting new plugs.

Quality Assurance

NGK manufactures Laser Iridium spark plugs to OE-level standards and tests them for durability and consistent performance in factory-style applications. The 2015-2017 Chevrolet Impala fitment is listed with a 100,000-mile OE manufacturer recommended service interval note.