Denso 4504 Spark Plug

Denso Platinum TT Spark Plug 4504

Denso Platinum TT 4504 is a secondary ignition spark plug built for precise combustion and stable performance across a wide range of import and domestic applications. Its twin-tip design helps promote faster flame propagation for more complete combustion, while the platinum center electrode supports consistent firing over time.

Key Features

• Twin-Tip ground electrode design for quicker flame travel
• Platinum center electrode tip for durable spark delivery
• Titanium enhanced twin-tip ground strap construction
• 5000 ohm resistor for reduced electrical noise
• Copper core center electrode and nickel ground electrode core
• Flat seat design with 14 mm thread diameter and 19.00 mm reach
• Pre-gapped to 1.0 for straightforward service replacement

Product Details

The Platinum TT line focuses on efficient ignition performance through a twin-tip electrode layout that supports a more complete burn in the cylinder. That design is paired with a platinum-tipped center electrode and a titanium enhanced ground strap to help maintain stable spark characteristics in demanding daily driving conditions. Denso 4504 is a practical OE-style replacement choice for vehicles such as Honda Civic, Toyota Camry, and BMW 3-series applications listed in the fitment data, as well as many other import platforms.

This part cross-references DENSO Auto Parts PK20TT for the same application.

What It Helps Address

• Rough idle caused by worn or inconsistent spark plugs
• Hard starting from weakened ignition output
• Misfire conditions related to degraded plug electrodes
• Reduced combustion efficiency from excessive electrode wear
• Radio-frequency interference in ignition systems

Installation Notes

Verify thread diameter, reach, seat type, and heat range before installation. The plug uses a 16.0 mm hex and a flat seat, so correct socket selection and torque procedure matter. Confirm vehicle-specific fitment for applications such as 2003-2011 Honda Civic, 1992-2011 Toyota Camry, and 2000-2010 BMW X5 before service. Follow the manufacturer’s service specifications for gap verification and tightening.

Quality Assurance

Denso Platinum TT spark plugs are engineered to meet the dimensional and material requirements listed above, including platinum center electrode construction and a twin-tip ground configuration. Part number 4504 is built for direct replacement use in the confirmed fitment applications shown.