DENSO
More Information for DENSO 3121
{Alternate Inventory Numbers: K20PRU11}
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DENSO 3121  
($1.70/Each)
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 $0.00
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Pack
 $1.70
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DENSO 3121 Specifications
Center Electrode Core MaterialCopper
Center Electrode Tip MaterialNickel
Ground ConfigurationStandard
Ground Electrode Core MaterialNickel
Ground Electrode Quantity1
Ground Electrode Tip DesignU-Groove
Hex Size16 mm
Manufacturer Heat Range20
Pre-Gap Size1.1 MM
Reach19.0 mm
Resistance5000.0 oh
Seat TypeFlat
Thread Diameter14.0 mm
U-Groove Conventional; Pre-Set Gap: 0.044"
Features & Benefits:
  • PERFORMANCE / IGNITABILITY
    • Nickel Alloy Center Electrode -- for reliable, cost-effective performance.
  • EFFICIENCY / FUEL ECONOMY
    • Patented U-Groove① Ground Electrode -- enables complete combustion by allowing the spark to fill the gap created by the U shape. The ball of fire created in the U-Groove develops a larger and hotter flash front that virtually eliminates excessive fouling and erratic starts caused by poor fuel mixtures.
①
Fuel Mileage
Which DENSO Spark Plug Is Right For You?

Material / Series Lifespan / Durability Performance / Ignitability Efficiency / Fuel Economy
Copper / Nickel U-Groove
U-Groove		 ★ ★ ★
Platinum Twin Tip
Platinum Twin-Tip		 ★★★★ ★★ ★★
Double Platinum
Doulbe Platinum		 ★★★★★ ★★ ★★
Iridium Twin Tip
Iridium Twin Tip		 ★★★★★★ ★★★★ ★★★
Iridium Power
Iridium Power		 ★★★★ ★★★★★ ★★★
Iridium Long Life
Iridium Long Life		 ★★★★★★ ★★★★ ★★
Videos

How To Replace DENSO Spark Plugs

OEM / Interchange Numbers: 000018BP03, 09146367, 0948200494, 0948200508, 0948200510, 0K01C18110, 0K23A18110, 1882311091, 2240150Y06, 2240185E16, 22401AA310, 22401AA450, 22401AA540, 22401AA550, 22401AA65A, 242229606, 25108074, 3923, 5269556, 5269899, 5614257, 8251080740, 88901007, 8943283720, 8943283740, 94328372, 96068564, 96130723, BP0318110, BP0418110, BP1218110, M04671057, M05269899

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