Bosch 8183 Spark Plug

Bosch OE Fine Wire Double Platinum Spark Plug 8183

Bosch 8183 is an OE Fine Wire Double Platinum spark plug built for steady ignition performance and extended service life. It uses platinum on the center electrode and a platinum inlay on the ground electrode to reduce gap erosion and maintain consistent firing characteristics in Mercedes-Benz and Dodge Sprinter applications.

Key Features

• Fine wire center electrode with platinum tip for stable spark delivery
• Double platinum design helps reduce electrode wear over time
• Resistor spark plug with 6000 resistance
• Flat seat, 12 mm thread diameter, 26.5 mm reach
• J-gap ground configuration with one ground electrode
• Ceramic insulator and non-removable nut terminal
• Heat range 7 with .8 pre-gap size

Product Details

The Bosch OE Fine Wire Double Platinum line is engineered to match original equipment spark plug requirements while focusing on durability and consistent ignition performance. Part number 8183 uses a copper core center electrode, platinum center tip, and platinum ground tip to help control wear at the firing surfaces. That construction supports reliable combustion in vehicles that call for a double platinum, fine-wire plug, including Mercedes-Benz C350, E350, ML350, R350, S550, and related applications, as well as Dodge Sprinter 2500 and Sprinter 3500 models.

This part cross-references Bosch 8183 for the same application.

What It Helps Address

• Misfires caused by worn spark plug electrodes
• Hard starting from weak or inconsistent spark output
• Rough idle related to degraded ignition performance
• Reduced fuel economy from incomplete combustion
• Service intervals shortened by rapid gap erosion

Installation Notes

Verify the engine calls for a 12 mm, flat-seat, double platinum spark plug with a 26.5 mm reach before installation. Check the gap specification against the vehicle service information, and inspect ignition coils, boots, and plug wells for wear or contamination while servicing. Confirm fitment for the exact Mercedes-Benz or Dodge Sprinter model and engine configuration before replacing plugs.

Quality Assurance

Bosch designs this spark plug to meet original equipment specifications for double platinum applications. The platinum firing surfaces and OE-style construction are selected to support long-term durability and consistent ignition performance in the listed vehicles.