NGK 3787 Spark Plug

NGK Laser Iridium Spark Plug 3787

NGK Laser Iridium Spark Plug 3787 is an OE-style ignition component built for precise spark delivery and stable engine performance. It is a direct-fit spark plug for select Mazda applications, including Mazda 3, Mazda CX-7, and Mazda 6 models listed below.

The Laser Iridium line focuses on durable electrode construction and consistent ignition performance. For drivers servicing a Mazda 3, Mazda CX-7, or Mazda 6, this NGK spark plug offers the factory-style fit and heat range specified for the confirmed applications.

Key Features

• Laser Iridium center electrode tip for durable spark performance
• 5,000 ohm resistance for ignition system compatibility
• Standard ground electrode design with a single ground electrode
• Copper core construction at the center and ground electrodes
• Pre-gapped to 0.032 in for the listed applications
• Tapered seat, 14 mm thread diameter, and 5/8 in hex size
• NGK part number 3787 / ILTR6A-8G

Product Details

NGK is a long-established OE supplier with broad coverage across domestic and import vehicles. This Laser Iridium Spark Plug 3787 is built to match the specified factory-style requirements for the confirmed Mazda fitments, helping maintain proper combustion, smooth idle quality, and reliable starting when the ignition system is serviced with the correct plug.

Compatible With 2007-2009 Mazda 3, N/A; 2007-2009 Mazda CX-7, N/A; and 2006-2007 Mazda 6, N/A. This part cross-references CSF 3787 for the same application.

What It Helps Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weakened ignition performance
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from inconsistent spark delivery
• Maintenance intervals requiring OE-style spark plug replacement

Installation Notes and Tips

• Verify the engine application against the listed Mazda fitment before installation.
• Confirm the plug gap is 0.032 in for the specified vehicles.
• Use the correct 5/8 in spark plug socket and follow manufacturer torque specifications.
• Inspect ignition coils and boots during service to help prevent repeat misfire concerns.

Quality Assurance

NGK manufactures spark plugs to OE standards and supports a wide range of automotive applications with established manufacturing and distribution operations in North America and globally. Part number 3787 is built for the confirmed Mazda applications listed above.