Bosch 8123 Spark Plug

Bosch OE Fine Wire Double Platinum Spark Plug 8123

Bosch 8123 is an OE Fine Wire Double Platinum spark plug built for stable ignition performance and extended service life. It uses platinum on the center electrode and platinum in the ground electrode to reduce gap erosion and maintain consistent firing characteristics in OE-style applications.

Compatible With Chrysler 300, Dodge Charger, and Chrysler Pacifica applications that call for a preset-gap double platinum plug, Bosch 8123 supports factory-style ignition service for a wide range of Chrysler, Dodge, and Volkswagen vehicles.

Key Features

• Double platinum design with platinum firing pin and platinum ground electrode inlay
• OE Fine Wire Double Platinum line for original-equipment-style ignition service
• Preset gap; do not gap before installation
• Resistor spark plug with 6000 ohm resistance
• Projected ceramic insulator for consistent flame exposure
• 14 mm thread diameter, 19 mm reach, flat seat, 16 mm hex
• Heat range 8 for specified OE applications

Product Details

Bosch Part Number 8123 is a 4-cycle spark plug engineered around OE specifications for double platinum applications. The fine-wire platinum center electrode and platinum-enhanced ground electrode help limit wear at the gap, which supports long-term ignition consistency in engines that require a factory-style platinum plug. This Bosch OE Fine Wire Double Platinum plug is used in vehicles such as the Chrysler 300, Dodge Charger, Dodge Magnum, Chrysler Pacifica, Dodge Grand Caravan, and Volkswagen Routan when the catalog calls for this exact specification.

Common Issues This Plug Can Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from degraded ignition performance
• Misfire concerns related to excessive gap wear
• Reduced throttle response from inconsistent spark delivery
• Service intervals shortened by standard-plug electrode erosion

Installation Notes

• Do not gap this spark plug; the gap is preset.
• Verify the engine calls for a 14 mm thread, 19 mm reach, flat-seat plug with heat range 8.
• Confirm OE-style double platinum specification before installation.
• Use the vehicle service information for torque and removal procedures.

Quality Assurance

Bosch designs this plug to meet Original Equipment specifications for double platinum spark plugs. The platinum-on-platinum electrode construction is used to improve durability and maintain performance over time in the listed Chrysler, Dodge, and Volkswagen applications.