Bosch® 8123 - FineWire™ OE Double Platinum Spark Plug

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Product Details

FineWire™ OE Double Platinum Spark Plug by Bosch®. These spark plugs are the perfect solution to extend performance life and increase durability. The fine wire design of the center electrode improves ignitability and engine performance while the platinum tip on the center and ground electrodes ensures longer service. All backed by a 6-year performance satisfaction guarantee.


Electrode Tip Material: Platinum
Ground Electrode Tip Material: Nickel-Yttrium and Copper and Platinum
Ground Electrode Core Material: Copper
Ground Electrode Tip Design: Standard
Ground Electrode Quantity: 1
Insulator Material: Ceramic
Resistor: Yes
Nominal Gap: 0.050"
Spark Plug Gap: Pre-gapped
Spark Plug Thread Size: 14 mm
Spark Plug Reach: 0.750" (19 mm)
Wrench Diameter: 0.625"
Thread Diameter: 0.551"
Thread Length: 0.748"
Heat Range: 8
Seat Type: Gasket Seat
Quantity: 1 Piece


  • 360° continuous laser welding to fuse the platinum firing pin promotes durability and longer life
  • Fine wire design delivers better ignitability and performance
  • Copper core provides broader heat range to resist pre-ignition and fouling
  • Laser welded platinum inlay promotes durability and longer life
  • Copper core (when required) provides broader heat range to resist pre-ignition
  • Nickel-plated shell with rolled threads for complete anti-freeze and corrosion protection
  • Ribbed insulator design prevents misfires due to flash-over
  • Factory pre-gapped for faster installation
  • Backed by a 6-year performance satisfaction guarantee

During operation, the spark plug is subjected to both wear and fouling and should be replaced at regular intervals. Bosch introduces their latest OE technology to the aftermarket. Built around OE technology, Double Platinum Spark Plugs have an OE specific design and are manufactured to be a direct replacement for OE spark plugs. Thanks to the fine wire design of the center electrode, these plugs deliver better ignitability and guarantee 3x longer service (versus standard Copper plugs) thanks to the Platinum tips on the center and ground electrodes.

Bosch®, a premier global supplier of services and technology, is a privately held company headquartered in Germany. Its operations have been divided into four main business sectors that include automotive technology, industrial technology, energy and building technology, and consumer goods. Bosch products and services are designed to fascinate and improve the quality of life by offering innovative and beneficial solutions. The company offers technology worldwide that is “Invented for Life.”

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Warranty Information

Bosch warrants its products to be free from defects in materials or workmanship for a period of 1 year/12,000 miles. The warranty period begins on the date the product is delivered. The warranty is granted to the end-user and applies to products which are purchased, installed, and used for the purposes for which they are originally designed. This warranty covers defects arising under normal use and does not cover malfunctions or failures resulting from misuse, abuse, neglect, improper installation, or incorrect maintenance. During the warranty period, Bosch will repair or replace, at no charge, a product that is defective in materials or workmanship. Bosch reserves the right to either repair or replace a defective component at its discretion and reserves the right to substitute an equivalent product under the terms of this warranty.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

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