NGK 91006 Spark Plug

NGK Laser Iridium Spark Plug for OE Fitment

NGK 91006 is a Laser Iridium High Ignitability spark plug built for direct replacement service on select Audi, Volkswagen, and Porsche applications. It combines an iridium center electrode with a high-ignitability square platinum ground electrode design to support consistent ignition performance and OE-style service intervals.

For drivers searching for an Audi A3 spark plug, Volkswagen GTI spark plug, or Porsche Macan spark plug, NGK 91006 provides the factory-style specifications needed for the listed applications.

Key Features

• Laser Iridium High Ignitability design for precise spark delivery
• Iridium center electrode tip for durability and stable ignition performance
• Square platinum ground electrode tip design for high ignitability
• Resistor type spark plug with 1000 resistance
• Flat seat, 14.00 mm thread diameter, 5/8 hex size
• Pre-gapped to .028 for the listed OE applications
• NGK part number 91006, also identified as SILFER8C7ES

Product Details

NGK’s Laser Iridium High Ignitability Spark Plug line is built around OE-level engineering and application-specific ignition requirements. This plug uses a copper core center electrode with an iridium tip and a nickel ground electrode core, along with a resistor design to help maintain stable ignition characteristics. The 26.5 reach, flat seat, and 50.50 insulator height align with the listed factory applications, including Audi A3, Audi Q5, Audi RS3, Volkswagen Atlas, Volkswagen GTI, and Porsche Macan models.

This part cross-references Dorman - HELP 91006 for the same application.

What This Spark Plug Helps Address

• Hard starting caused by worn or weakened spark plugs
• Rough idle from inconsistent ignition output
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from degraded spark quality
• Service interval replacement on listed Audi, Volkswagen, and Porsche engines

Installation Notes and Tips

Verify engine application by year, make, model, and OE service interval before installation. Confirm the plug gap matches the listed .028 specification where required, and inspect ignition coils and boots during service. Use the correct 5/8 hex spark plug socket and follow the manufacturer torque specification for the engine.

Compatible With 2024-2025 Volkswagen Atlas, N/A; 2024-2025 Volkswagen Atlas Cross Sport, N/A; 2022-2024 Audi A3, N/A; 2022-2024 Audi A3 Quattro, N/A; 2021-2024 Audi A4 allroad, N/A; 2021-2024 Audi A4 Quattro, N/A; 2021-2024 Audi A5 Quattro, N/A; 2021-2024 Audi A5 Sportback, N/A; 2021-2024 Audi A6 Quattro, N/A; 2021-2024 Audi Q5, N/A; 2023-2024 Audi Q5 PHEV, N/A; 2021-2024 Audi Q5 Sportback, N/A; 2022-2024 Audi RS3, N/A; 2022-2024 Porsche Macan, N/A; 2022-2024 Volkswagen GTI, N/A; 2021-2022 Audi TT RS Quattro, N/A; 2017-2020 Audi RS3, N/A; 2018-2020 Audi TT RS Quattro, N/A; 2017-2018 Audi A8 Quattro, N/A; 2018 Audi RS7, N/A; 2017-2018 Audi S6, N/A; 2017-2018 Audi S7, N/A; 2018 Audi S8, N/A; 2017 Audi RS7, N/A; 2017 Audi S8, N/A; 2013-2016 Audi A8 Quattro, N/A; 2014-2016 Audi RS7, N/A; 2013-2016 Audi S6, N/A; 2013-2016 Audi S7, N/A; 2013-2016 Audi S8, N/A; 2012-2013 Audi TT RS Quattro, N/A.

Quality Assurance

NGK is a major OE spark plug supplier in North America with more than 80 years of automotive experience. The brand manufactures ignition components to original equipment standards for domestic and import vehicles, with North American and global manufacturing, inventory, and distribution support.