NGK 90911 Spark Plug

Reliable Ignition Performance for Toyota Prius C

The NGK Laser Iridium High Ignitability Spark Plug 90911 is engineered to deliver consistent ignition and efficient combustion for your Toyota Prius C. Designed with advanced materials and precise specifications, this spark plug supports optimal engine performance and fuel efficiency.

• Iridium center electrode tip for enhanced durability and ignition
• Nickel ground electrode core with a single tip design
• Pre-set gap size of 0.031 inches for precise spark delivery
• Flat seat type with 14mm thread diameter and 0.75 inch reach
• Electrical terminal type: stud for secure connection
• Manufacturer heat range rating of 5 for balanced thermal performance
• Hex size approximately 0.63 inches for standard installation tools

About the NGK Laser Iridium High Ignitability Spark Plug Line

The Laser Iridium High Ignitability Spark Plug line from NGK is designed to provide improved ignition efficiency through the use of a fine iridium center electrode tip. This technology allows for a more reliable spark and better fuel combustion, which can contribute to smoother engine operation and reduced emissions. The 90911 part number is part of this line, offering a balance of durability and performance tailored for secondary ignition systems.

Technical Details and Specifications

This NGK spark plug features a copper core center electrode with an iridium tip, combining excellent conductivity with wear resistance. The ground electrode is made from nickel with a single tip design (Dfe configuration), which helps maintain a stable spark gap. The plug has a resistance rating of 5000 ohms, which aids in suppressing electrical noise. With a flat seat and a thread diameter of 14mm, it fits securely in the combustion chamber of the Toyota Prius C. The insulator height is 50.5mm, and the pre-gap is factory set at 0.031 inches to ensure optimal ignition timing.

Compatible Applications and Common Issues Addressed

• Compatible with Toyota Prius C models requiring part number 90911
• Helps resolve misfires caused by worn or fouled spark plugs
• Improves cold start performance and throttle response
• Reduces engine hesitation and rough idling
• Supports efficient fuel combustion to lower emissions

Installation Notes and Tips

When installing the NGK 90911 spark plug, ensure the engine is cool to prevent damage to the threads. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended specifications to avoid over-tightening. The stud-type electrical terminal requires a compatible ignition wire connector for secure attachment. Verify the pre-gap size before installation, although it is factory set for most Toyota Prius C applications.

Quality Assurance and Warranty

NGK spark plugs are manufactured to strict quality standards to ensure reliable performance and longevity. The Laser Iridium High Ignitability Spark Plug 90911 undergoes rigorous testing for durability and electrical consistency. While specific warranty details are not provided here, NGK products typically come with manufacturer-backed quality assurance to support customer confidence.