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BOSCH 4458
PLATINUM+4
The best of the Bosch Platinum Series, with the most platinum, delivers maximum engine power for a longer performance life.
  • Revolutionary surface air gap firing technology featuring multiple spark paths to deliver the longest, most powerful spark for ultimate engine performance
  • More platinum vs. Bosch Platinum Plus for smoother acceleration, better gas mileage and optimum engine performance
  • Four yttrium-enhanced ground electrodes provide optimum access to the air/fuel mixture for the most efficient combustion, plus the yttrium alloy ground electrodes reduce gap wear and oxidation for extended performance life
  • Factory pre-set gap for ease of installation. Never requires adjustment

Spark Plug Type Performance Differences

Center Electrode Core MaterialPlatinum
Center Electrode Tip MaterialPlatinum
Gap Size1.6 mm
Ground ConfigurationMultiple
Ground Electrode Core MaterialN/A
Ground Electrode Quantity4
Ground Electrode Tip DesignMultiple
Ground Electrode Tip MaterialNickel-Yttrium
Hex Size16
Insulator MaterialCeramic
Manufacturer Heat Range8
Reach17.5 mm
Resistance6000
Seat TypeTapered
Short StyleNo
Thread Diameter14 MM

BOSCH Warranty Information
Alternators & Starters w/ Part Number Not Ending In "N": 24 months; Alternators & Starters w/ Part Number Ending In "N": Lifetime Warranty for Non-Commercial Passenger Vehicles; Spark Plug Wire Sets: Lifetime; Wiper Products: 30 days; Fuel Pumps Purchased After 10/1/16: Limited Lifetime. Engine Management Parts (like Air Management Sensors, Engine Position Sensors, Gasoline Fuel Injectors, High Pressure Fuel Pumps, Ignition Coils, Pressure Sensors, Temperature Sensors, Throttle Devices) Purchased After 11/15/16: Limited Lifetime. Engine Management Parts Purchased Before 11/15/16, Fuel Pumps Purchased Before 10/1/16, and All Other Product Lines: 12 months.