Bosch 7407 Spark Plug

Bosch Nickel Spark Plug 7407 Overview

Bosch 7407 is a conventional nickel-copper spark plug built for steady ignition performance and OE-style service life. It uses a heavy-duty yttrium-enhanced nickel center electrode with a copper core, along with a ceramic insulator and resistor design for consistent operation in supported applications.

Compatible with select Mercedes-Benz C230 and Mercedes-Benz SLK230 models, Bosch 7407 is a direct-fit spark plug for drivers servicing the ignition system on these vehicles. The preset gap and flat seat design help simplify replacement when the application calls for a nickel-copper core plug.

Key Features

• Bosch Nickel line spark plug for secondary ignition service
• Part number 7407
• Nickel center electrode with nickel and copper core material
• Heavy-duty yttrium-enhanced electrode construction for extended service life versus standard copper-core designs
• Resistor spark plug with 6000 resistance specification
• Preset gap, flat seat, and non-projected insulator design
• Multiple ground electrode configuration with three ground electrodes
• 14 mm thread diameter, 19 mm reach, and 16 mm hex size

Product Details

The Bosch Nickel product line focuses on conventional spark plugs that meet or exceed original equipment specifications for nickel-copper core applications. Bosch 7407 follows that approach with a nickel center electrode, nickel ground electrode tip material, and copper-core construction to support stable spark delivery in the correct engine application. This plug is specified for 4-cycle engines and is listed for 1998-2000 Mercedes-Benz SLK230 and 1999-2000 Mercedes-Benz C230, making it a relevant choice for Mercedes-Benz ignition maintenance. If you are searching for Bosch 7407 for Mercedes-Benz C230 or Bosch 7407 for Mercedes-Benz SLK230, this plug matches the confirmed fitment data provided.

Common Issues This Part May Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition firing
• Misfire symptoms related to aged plugs
• Reduced throttle response from degraded spark delivery
• Service replacement for plugs that no longer meet OE-style specifications

Installation Notes and Tips

Use Bosch 7407 only on the listed Mercedes-Benz applications and follow the preset gap specification; do not gap the plug unless the vehicle service information calls for verification. Confirm the engine’s original spark plug specification, thread reach, seat type, and heat range before installation. Clean the plug wells, inspect ignition wires or coils, and torque the plug to the vehicle manufacturer’s specification to avoid thread or sealing damage.

Quality Assurance

Bosch designs this Nickel spark plug to meet or exceed original equipment requirements for nickel-copper core spark plug applications. For buyers comparing ignition parts for Mercedes-Benz C230 and Mercedes-Benz SLK230 service, Bosch 7407 offers an OE-style replacement built around the specified materials and dimensions.