Denso 3421 Spark Plug

Buyer fitment guide only intended as reference. Please use catalogue search by vehicle to ensure proper fitment.

• DENSO Auto Parts SK20HR11
• Mitsubishi MN158596
• BMW 12 12 0 037 663
• BMW 12 12 2 158 253
• Toyota 9091901235
• Volvo 30650843-0
• BMW 12 12 0 032 138
• Datsun/Nissan 22401-5M016
• Datsun/Nissan 22401-CK81B
• Datsun/Nissan 22401-EA016
• Datsun/Nissan 22401-ZH016
• General Motors 12 78 8884
• General Motors 12565996
• General Motors 55 56 4748
• Toyota 9091901191
• Toyota 90919-A1002
• Honda 12293-PHM-A01
• Subaru 22401 AA580
• Subaru 32 01 0632
• Volvo 30650379-0
• Volvo 30713859-0
• Volvo 30751805-0
• Volvo 30751806-0
• Volvo 31216183-0
• Honda 12293PHMA01
• Datsun/Nissan 224015M016
• Datsun/Nissan 22401CK81B
• Datsun/Nissan 22401ZH016
• Toyota 9091901191
• Toyota 9091901235
• Toyota 90919A1002
• Datsun/Nissan 22401EA016
• DENSO Auto Parts SK20HR11#4
• NAPA Mileage Plus 3421

• Platinum center electrode
• Platinum ground electrode
• Premium shell construction with machine-rolled threads
• Reduced secondary required voltage, increased ignition efficiency
• Superior thermal conductivity
• Sustained spark performance over 60,000 miles
• DENSO is the pioneer in introducing platinum spark plugs to the automotive aftermarket, but has hardly been content to rest on that achievement. Conventional platinum plugs use platinum for only the center electrode, while the DENSO Double Platinum plug features platinum on both the center and ground electrodes. This precious metal fights corrosion and erosion, ensuring superior spark performance and maximum spark plug life capable of extended operation in excess of 60,000 miles.