NGK 6176 Spark Plug

NGK Laser Iridium Spark Plug for Toyota and Lexus

NGK 6176 is a Laser Iridium High Ignitability spark plug built for select Toyota and Lexus applications that call for OE-style ignition performance. It uses an iridium center electrode, a dual fine electrode ground design, and a 0.044 in. pre-gap to support consistent spark delivery in modern engines.

For drivers servicing a Toyota Camry, Avalon, Highlander, Sienna, Venza, or Lexus ES350, RX350, or RX450h, this NGK spark plug matches the high-ignitability OE requirement found in many of these vehicles. Part number 6176 is also identified as DILFR6D11.

Key Features

• Laser Iridium High Ignitability design for OE-style ignition performance
• Iridium center electrode tip with copper core for stable spark characteristics
• Dual fine electrode ground tip design for efficient ignition
• 0.044 in. pre-gap for listed applications
• Flat seat, 14 mm thread diameter, 5/8 in. hex size
• 5000 ohm resistance and non-removable nut terminal
• Heat range 6 for the specified engine applications

Product Details

NGK is a long-established OE spark plug supplier with broad coverage across domestic and import vehicles. The Laser Iridium High Ignitability line is focused on maintaining the ignition characteristics specified by the vehicle manufacturer, which is important for engines that rely on precise spark timing and stable combustion. This part number 6176 is listed for a wide range of Toyota and Lexus models, including 2005-2018 Toyota Avalon, 2007-2018 Lexus ES350, 2007-2015 Lexus RX350, and 2010-2015 Lexus RX450h.

This part cross-references DENSO Auto Parts (e.g., 4704) for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent ignition output
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from degraded spark performance
• Service replacement needs at the OE-recommended interval

Installation Notes and Tips

• Verify engine application before installation using the vehicle’s service information.
• Check the plug gap against the listed 0.044 in. specification before use.
• Use the correct torque procedure for the flat-seat design to avoid thread or sealing damage.
• Inspect ignition coils and boots during spark plug service, especially on higher-mileage Toyota and Lexus engines.
• Confirm the OE high-ignitability requirement on vehicles such as the Camry, Avalon, Highlander, Sienna, Venza, ES350, RX350, and RX450h.

Quality Assurance

NGK manufactures spark plugs for OE and aftermarket use with North American and global production and distribution support. Part 6176 is built to the listed OE-equivalent design and specifications for the covered Toyota and Lexus applications.