Denso 4508 Spark Plug

Denso Platinum TT Spark Plug 4508

Denso Platinum TT 4508 is a spark plug built for precise ignition performance in a wide range of import and domestic applications. Its twin-tip design helps promote faster flame propagation for more complete combustion, making it a strong OE-style choice for drivers servicing vehicles like the Jaguar XJ8, Volvo S80, and Mercedes-Benz S500.

Key Features

• Twin-Tip ground electrode design for quicker flame travel
• Platinum center electrode tip for durable ignition performance
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode core material for stable operation
• 5000 ohm resistance for ignition system compatibility
• Flat seat, 14.00 mm thread diameter, 19.00 mm reach, and 16.0 mm hex size
• Pre-gapped to 1.0 for straightforward service replacement

Platinum TT Design

The Denso Platinum TT line focuses on controlled spark delivery and combustion efficiency through a titanium enhanced twin-tip ground electrode. That design supports faster flame propagation, while the platinum tip and copper core help balance durability and heat management. For maintenance on vehicles such as the Volvo V70, Toyota Camry, or Honda Civic, Denso 4508 offers a technical match for ignition service where consistent firing characteristics matter.

This part cross-references DENSO Auto Parts PQ20TT and Toyota 90919-01127 for the same application.

What It Helps Address

• Rough idle caused by worn or inconsistent spark plugs
• Hard starting from weakened ignition performance
• Misfire conditions related to degraded plug electrodes
• Reduced combustion efficiency from aged secondary ignition components
• Service replacement needs on compatible Jaguar, Volvo, Mercedes-Benz, and Toyota applications

Installation Notes and Fitment

Compatible With 1984-1989 Nissan 300ZX, 1985-1988 Nissan Maxima, 1986-1990 Acura Legend, 1986-1989 Acura Integra, 1986-1988 Saab 9000, 1987-1988 Honda CRX, 1987-1988 Honda Civic, 1987-1989 Jaguar XJ6, 1987-1989 Nissan Pulsar NX, 1987-1990 Jeep Cherokee, 1987-1990 Jeep Comanche, 1987-1990 Jeep Wagoneer, 1987-1992 Toyota Supra, 1988 Honda Prelude, 1988-1989 Jaguar Vanden Plas, 1988-1989 Mazda 323, 1988-1989 Mazda 626, 1988-1989 Mazda 929, 1988-1989 Mazda MX-6, 1988-1989 Toyota MR2, 1988-1991 Honda Civic, 1988-1991 Honda CRX, 1988-1991 Volkswagen Jetta, 1988-1991 Volkswagen Passat, 1988-1993 Toyota Camry, 1989 Mazda B2600, 1989-1990 Mazda MPV, 1989-1990 Saab 9000, 1990-1991 Audi 90 Quattro, 1990-1991 Lexus ES250, 1990-1992 Volkswagen Golf, 1990-1994 Saab 9000, 1990-1994 Porsche 911, 1992-1993 Lexus ES300, 1992-1997 Volvo 960, 1994 Chrysler Sebring, 1994-1996 Volvo 850, 1994-1998 Dodge Stratus, 1994-1998 Saab 900, 1995-1998 Mercedes-Benz C230, 1996 Mercedes-Benz S420, 1996 Mercedes-Benz S500, 1996-1998 Mercedes-Benz SL600, 1997 Mercedes-Benz E320, 1997-1998 Mercedes-Benz S320, 1997-1998 Jaguar XK8, 1998-1999 Mercedes-Benz S420, 1998-1999 Mercedes-Benz S500, 1998-1999 Volvo S70, 1998-1999 Volvo V70, 1998-2003 Jaguar Vanden Plas, 1998-2003 Jaguar XJ8, 1998-2003 Jaguar XJR, 1998-2003 Volvo C70, 1999-2000 Volvo S70, 1999-2002 Volvo S80, 2000-2002 Jaguar S-Type, 2000-2002 Jaguar XK8, 2000-2002 Jaguar XKR, 2001-2003 Volvo S60, 2001-2003 Volvo V70, 2002-2003 Jaguar Vanden Plas.

• Fits 1998-2003 Jaguar XJ8, N/A
• Fits 1999-2002 Volvo S80, N/A
• Fits 2000-2002 Jaguar XK8, N/A
• Fits 2001-2003 Volvo V70, N/A
• Fits 1998-2003 Volvo C70, N/A

Check thread diameter, reach, seat type, and heat range against the original plug before installation. The 5000 ohm resistance and 1.0 pre-gap support direct replacement service when the application matches the OE specification.

Quality Assurance

Denso manufactures the Platinum TT line with OE-focused engineering and application-specific specifications. Part number 4508 is built to match the listed dimensions and ignition requirements for confirmed vehicle applications.