NGK 3672 Spark Plug

NGK V-Power Spark Plug for Subaru Outback

NGK 3672 is a V-Power spark plug built for reliable ignition performance in select Subaru applications, including 2001-2004 Subaru Outback models. It uses a copper core center electrode, nickel tip materials, and a standard ground electrode design to support consistent spark delivery and stable combustion.

Key Features

• NGK V-Power Spark Plug, part number 3672
• Fits 2001-2004 Subaru Outback, N/A
• Pre-gapped to .044 inches; verify and adjust to specification before installation
• Copper core center electrode for efficient heat transfer
• Nickel center and ground electrode tip materials
• Standard ground configuration with one ground electrode
• 5,000 ohm resistance and flat seat design
• 14.00 mm thread diameter, 26.5 mm reach, 5/8 hex size

Product Details

The NGK V-Power line focuses on dependable ignition performance with a center electrode and ground electrode design that promotes a consistent spark path. This spark plug uses a copper core center electrode, nickel tip materials, and a standard ground configuration to support everyday drivability and combustion stability. The NGK 3672 is identified as LFR6A-11 and is listed for 2001-2004 Subaru Outback applications.

NGK has a long OE supply history and manufactures ignition components for a wide range of domestic and import vehicles, along with motorcycle, marine, and small engine applications. For Subaru Outback owners searching for an NGK 3672 spark plug or an OE-style replacement spark plug for 2001-2004 Subaru Outback models, this part matches the listed fitment and core specifications.

What It Helps Address

• Rough idle caused by worn spark plugs
• Hard starting from weak ignition output
• Misfire conditions related to plug wear or gap drift
• Reduced throttle response from inconsistent spark delivery
• Fuel economy loss tied to incomplete combustion

Installation Notes

Confirm the plug gap before installation and set it to 0.044 inches as noted in the fitment data. Verify thread diameter, reach, seat type, and heat range against the vehicle specification before service. Use proper spark plug removal and torque procedures to avoid damage to the cylinder head or ignition system. This part cross-references Champion 975 for the same application.

Quality Assurance

NGK is a major OE spark plug supplier with extensive North American manufacturing and distribution support. The brand’s OE background and application coverage make NGK 3672 a practical choice for service work on listed Subaru Outback models.