Denso 4506 Spark Plug

Denso Platinum TT Spark Plug 4506

Denso Platinum TT 4506 is a secondary ignition spark plug built for direct OE-style replacement in a wide range of import and domestic applications. Its twin-tip design promotes faster flame propagation for more complete combustion, while the platinum center electrode and titanium-enhanced twin-tip ground design support consistent ignition performance.

Compatible With select Subaru Legacy, Toyota Camry, Honda Civic, and Lexus ES350 applications, this spark plug is engineered around precise fitment and stable electrical resistance. The Denso Platinum TT line focuses on dependable ignition response for vehicles that call for a platinum plug with a flat seat and 14 mm thread diameter.

Key Features

• Twin-Tip design for quicker flame travel and more complete combustion
• Platinum center electrode for durable ignition performance
• Titanium-enhanced twin-tip ground electrode design
• 5000 ohm resistance for controlled secondary ignition operation
• Pre-gapped to 1.0 mm for application-ready installation
• OE-style dimensions including 14.00 mm thread diameter, 26.50 mm reach, and 16.0 mm hex size
• Flat seat design for listed vehicle applications

Product Line Overview

Denso Platinum TT is the brand’s twin-tip spark plug line, developed to improve ignition efficiency through a focused electrode layout. The platinum center electrode and nickel ground core construction are paired with a copper center core to help maintain stable spark delivery across the listed fitments. Part number 4506 is one of the Platinum TT references used across multiple BMW, Toyota, Subaru, Volvo, Honda, and Lexus applications.

Detailed Description

This Denso 4506 spark plug is designed for drivers and technicians looking for a precise replacement in vehicles that specify a platinum twin-tip plug. The twin-tip configuration helps the spark kernel develop quickly, which supports smoother combustion and consistent engine response. It is a practical choice for maintenance on vehicles such as the Toyota Tundra, Subaru WRX STI, and Lexus GX460 where OE-style ignition characteristics matter.

This part cross-references DENSO Auto Parts PKH20TT for the same application.

What It Helps Address

• Rough idle caused by worn spark plug electrodes
• Hard starting related to weak ignition output
• Misfire conditions from degraded plug performance
• Reduced combustion consistency in high-mileage engines
• Maintenance replacement for OE-specified platinum spark plugs

Installation Notes and Fitment

Verify engine code, plug reach, seat type, and gap specification before installation. This plug is listed for a broad range of applications, including Fits 2015-2017 Subaru Legacy, N/A; Fits 2015-2017 Subaru Outback, N/A; Fits 2016-2017 Toyota Land Cruiser, N/A; Fits 2016-2017 Toyota Sequoia, N/A; Fits 2016-2017 Toyota Tundra, N/A; Fits 2016 Lexus ES350, N/A; Fits 2016 Lexus GX460, N/A; Fits 2016 Lexus LX570, N/A; Fits 2016 Subaru WRX STI, N/A; Fits 2016 Toyota Avalon, N/A; Fits 2016 Toyota Camry, N/A; Fits 2016 Toyota Highlander, N/A; Fits 2016 Toyota Sienna, N/A; Fits 2016 Toyota Tacoma, N/A; Fits 2015-2016 Volvo S60, N/A; Fits 2015-2016 Volvo V60, N/A; Fits 2015-2016 Volvo V60 Cross Country, N/A; Fits 2015-2016 Volvo XC60, N/A; Fits 2015-2016 Volvo XC70, N/A; Fits 2015 Honda Civic, N/A; Fits 2006-2011 Honda Civic, N/A.

Some listed applications note special cylinder requirements or engine-specific plug configurations. Confirm the vehicle’s service information before ordering or installing Denso 4506.

Quality Assurance

Denso manufactures Platinum TT spark plugs to OE-level dimensional standards with application-specific electrode design and material selection. Part number 4506 is built for consistent ignition service in the listed fitments and is backed by Denso’s product engineering standards.