Bosch 79003 Copper Core Nickel Spark Plug

The Bosch 79003 Super Plus spark plug delivers reliable ignition performance with racing-proven technology. This copper core spark plug features a heavy-duty yttrium-enhanced nickel center electrode that provides superior durability and service life compared to standard copper plugs.

Key Features:

• Yttrium-enhanced nickel center electrode for extended service life
• Copper core provides excellent heat transfer to resist pre-ignition and fouling
• Metal glass fused resistor maximizes interference suppression
• Ribbed insulator design prevents misfire due to current leakage
• Nickel-plated rolled threads offer superior corrosion resistance
• 14mm thread size with 19mm (0.748 inch) reach
• Flat seat design with non-projected tip
• Heat range 8 for optimal performance

The Bosch 79003 (FR8KTC) spark plug is engineered to provide consistent ignition, improved fuel efficiency, and reduced emissions. This OEM-quality replacement plug meets the exacting standards required for peak engine performance. Cross-references include Mercedes-Benz part numbers 0031597503, 003159750310, 003159750316, 003159750326, and A0031597503. Sold individually.