Denso 4502 Spark Plug

Denso Platinum TT Spark Plug 4502

Denso Platinum TT 4502 is a secondary ignition spark plug built for direct OE-style replacement in a wide range of import and domestic applications. Its twin-tip electrode layout is engineered to promote faster flame travel for more complete combustion, helping maintain consistent ignition performance in vehicles such as the Honda Accord, Mitsubishi Eclipse, and Volkswagen Golf.

Key Features

• Titanium Enhanced Twin-Tip ground electrode design for quicker flame propagation
• Platinum center electrode tip for durable ignition performance
• Copper center electrode core for efficient heat transfer
• Nickel ground electrode core material
• 5000 ohm resistance for standard ignition system operation
• Pre-gapped at 1.0 mm for OE-style service replacement
• Flat seat, 14.00 mm thread diameter, 19.00 mm reach, and 20.6 mm hex size
• Manufacturer heat range 20

Platinum TT Line Details

Denso Platinum TT plugs are part of the Platinum TT line, which focuses on twin-tip electrode geometry and platinum-tipped construction. The design is intended to support stable spark delivery and efficient combustion in older and newer engine platforms that specify this plug style.

Detailed Description

This Denso spark plug is designed for vehicles that call for a flat-seat, 14 mm plug with a 19.00 mm reach and 1.0 mm pre-gap. The twin-tip configuration helps the spark kernel develop quickly, which is important in engines that rely on precise secondary ignition performance. This part number, 4502, also cross-references DENSO Auto Parts PW20TT for the same application.

Compatible fitment includes many Honda Accord and Prelude models, Mitsubishi Galant and Eclipse applications, Volkswagen Jetta and Golf models, and Volvo 740, 760, and 940 vehicles. It also appears across select Porsche 911, 924, 928, and 944 applications, along with older Nissan, Mazda, Subaru, and Mercedes-Benz platforms.

What It Helps Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weak or inconsistent spark output
• Misfire conditions related to aged secondary ignition components
• Incomplete combustion that can affect throttle response
• Service intervals where OE-style spark plug replacement is required

Installation Notes and Tips

Verify thread diameter, reach, seat type, and heat range against the vehicle specification before installation. The plug is pre-gapped at 1.0 mm, but the gap should still be checked during service to confirm it matches the engine requirement. Use proper torque procedures and inspect ignition wires, coils, and distributor components at the same time to avoid repeat misfire concerns.

Quality Assurance

Denso manufactures ignition components to OE-level specifications for a broad range of vehicle platforms. The Platinum TT design combines a platinum-tipped center electrode with a twin-tip ground configuration to support consistent spark performance in the listed applications.

Fitment

• Fits 1990-1999 Mitsubishi Eclipse, N/A
• Fits 1989-1998 Hyundai Sonata, N/A
• Fits 1989-1997 Suzuki Swift, N/A
• Fits 1992-1996 Mitsubishi Diamante, N/A
• Fits 1983-1996 Mitsubishi Mighty Max, N/A
• Fits 1992-1995 Hyundai Elantra, N/A
• Fits 1993-1995 Porsche 928, N/A
• Fits 1978-1991 Porsche 928, N/A
• Fits 1991-1995 Volvo 940, N/A
• Fits 1986-1994 Hyundai Excel, N/A
• Fits 1987-1994 Mitsubishi Precis, N/A
• Fits 1990-1994 Plymouth Laser, N/A
• Fits 1992-1994 Pontiac Sunbird, N/A
• Fits 1992-1994 Volkswagen EuroVan, N/A
• Fits 1992-1993 Isuzu Stylus, N/A
• Fits 1989-1993 Mitsubishi Galant, N/A
• Fits 1985-1987 Mitsubishi Galant, N/A
• Fits 1985-1993 Volkswagen Cabriolet, N/A
• Fits 1990-1993 Volvo 240, N/A
• Fits 1971-1992 Dodge Colt, N/A
• Fits 1991-1992 Hyundai Scoupe, N/A
• Fits 1987-1992 Mazda B2200, N/A
• Fits 1992 Mitsubishi Expo, N/A
• Fits 1985-1992 Mitsubishi Mirage, N/A
• Fits 1990-1992 Volkswagen Corrado, N/A
• Fits 1990-1992 Volkswagen Golf, N/A
• Fits 1985-1986 Volkswagen Golf, N/A
• Fits 1990-1992 Volkswagen Jetta, N/A
• Fits 1981-1986 Volkswagen Jetta, N/A
• Fits 1991-1992 Volkswagen Passat, N/A
• Fits 1985-1992 Volvo 740, N/A
• Fits 1989-1991 Volvo 780, N/A
• Fits 1987-1990 Chevrolet Sprint, N/A
• Fits 1987-1990 Jeep Grand Wagoneer, N/A
• Fits 1987-1990 Mitsubishi Van, N/A
• Fits 1984-1990 Volvo 760, N/A
• Fits 1983-1989 Dodge Ram 50, N/A
• Fits 1989 Geo Spectrum, N/A
• Fits 1987-1989 Honda Accord, N/A
• Fits 1985 Honda Accord, N/A
• Fits 1981-1983 Honda Accord, N/A
• Fits 1976-1978 Honda Accord, N/A
• Fits 1981-1989 Isuzu I-Mark, N/A
• Fits 1983-1989 Isuzu Impulse, N/A
• Fits 1985-1989 Mitsubishi Montero, N/A
• Fits 1983-1989 Mitsubishi Starion, N/A
• Fits 1984-1989 Porsche 911, N/A
• Fits 1978-1979 Porsche 911, N/A
• Fits 1987-1989 Porsche 944, N/A
• Fits 1987-1989 Volkswagen Golf, N/A
• Fits 1987-1989 Volkswagen Jetta, N/A
• Fits 1985-1988 Chevrolet Spectrum, N/A
• Fits 1981-1988 Isuzu Pickup, N/A
• Fits 1984-1988 Isuzu Trooper, N/A
• Fits 1985-1988 Jeep J10, N/A
• Fits 1985-1988 Jeep J20, N/A
• Fits 1983-1988 Mitsubishi Cordia, N/A
• Fits 1983-1988 Mitsubishi Tredia, N/A
• Fits 1987-1988 Porsche 924, N/A
• Fits 1977-1982 Porsche 924, N/A
• Fits 1979-1988 Saab 900, N/A
• Fits 1982-1988 Volkswagen Quantum, N/A
• Fits 1981-1987 Audi Coupe, N/A
• Fits 1983-1987 Honda Prelude, N/A
• Fits 1986-1987 Mazda 626, N/A
• Fits 1986-1987 Mercedes-Benz 560SEC, N/A
• Fits 1986-1987 Mercedes-Benz 560SEL, N/A
• Fits 1986-1987 Mercedes-Benz 560SL, N/A
• Fits 1976-1987 Subaru Standard, N/A
• Fits 1987 Volkswagen Fox, N/A
• Fits 1980-1986 Audi 4000, N/A
• Fits 1984-1986 Dodge Conquest, N/A
• Fits 1986 Honda Civic, N/A
• Fits 1973-1983 Honda Civic, N/A
• Fits 1984-1986 Maserati Quattroporte, N/A
• Fits 1986 Mercedes-Benz 420SEL, N/A
• Fits 1984-1986 Plymouth Conquest, N/A
• Fits 1984-1985 Audi 4000 Quattro, N/A
• Fits 1982-1985 Chevrolet S10, N/A
• Fits 1982-1985 GMC S15, N/A
• Fits 1985 Volvo 745, N/A
• Fits 1983-1984 Chevrolet S10 Blazer, N/A
• Fits 1983-1984 Dodge Power Ram 50, N/A
• Fits 1983-1984 GMC S15 Jimmy, N/A
• Fits 1982-1984 Nissan Maxima, N/A
• Fits 1983-1984 Nissan Pulsar NX, N/A
• Fits 1984 Volvo GLE, N/A
• Fits 1979-1983 Nissan 280ZX, N/A
• Fits 1975-1982 Chevrolet LUV, N/A
• Fits 1979-1982 Dodge D50, N/A
• Fits 1977-1981 Nissan 200SX, N/A
• Fits 1980-1981 Nissan 510, N/A
• Fits 1977-1981 Nissan 810, N/A
• Fits 1976-1980 Jaguar XJS, N/A
• Fits 1980 Nissan 720, N/A
• Fits 1978-1979 Dodge Challenger, N/A
• Fits 1973-1979 Jaguar XJ12, N/A
• Fits 1978-1979 Nissan 510, N/A
• Fits 1968-1973 Nissan 510, N/A
• Fits 1972-1978 Ford Courier, N/A
• Fits 1967-1974 Toyota Corona, N/A
• Fits 1971-1973 Ford Pinto, N/A
• Fits 1972-1973 Mercedes-Benz 300SEL, N/A
• Fits 1968-1969 Mercedes-Benz 300SEL, N/A
• Fits 1963-1965 Mercedes-Benz 300SEL, N/A
• Fits 1971-1973 Mercury Capri, N/A
• Fits 1969-1973 Toyota Pickup, N/A
• Fits 1971-1972 Toyota Celica, N/A
• Fits 1971 Chevrolet Impala, N/A
• Fits 1966-1969 Chevrolet Impala, N/A
• Fits 1966-1970 Chevrolet El Camino, N/A
• Fits 1959-1960 Chevrolet El Camino, N/A
• Fits 1969-1970 Chevrolet Nova, N/A
• Fits 1966-1969 Chevrolet Bel Air, N/A
• Fits 1958-1961 Chevrolet Bel Air, N/A
• Fits 1968-1969 Chevrolet C10 Suburban, N/A
• Fits 1968-1969 Chevrolet C20 Suburban, N/A
• Fits 1967-1969 Chevrolet Camaro, N/A
• Fits 1966-1969 Chevrolet Caprice, N/A
• Fits 1968-1969 Chevrolet Corvette, N/A
• Fits 1966 Chevrolet Corvette, N/A
• Fits 1968-1969 Chevrolet K10 Suburban, N/A
• Fits 1966-1967 Chevrolet Malibu, N/A
• Fits 1960-1966 Mercedes-Benz 300SE, N/A
• Fits 1960-1963 Mercedes-Benz 300SL, N/A