Bosch FB546 Copper Core Spark Plug

The Bosch FB546 is a copper core spark plug engineered to deliver reliable ignition performance across a wide range of gasoline engines. Bosch has been a pioneer in spark plug technology for over a century, and the FB546 carries on that tradition with a durable, precision-manufactured design suited for OEM replacement applications.

Key Features:

• Copper core center electrode for excellent conductivity and reliable ignition
• Nickel-alloy ground electrode for durability and long service life
• Ribbed insulator design helps prevent flashover and misfires
• Triple gasket sealing eliminates combustion gas leakage
• Corrosion-resistant shell with rolled threads to protect the cylinder head during installation and removal
• Meets or exceeds OEM specifications for direct-fit replacement

The Bosch FB546 spark plug is an ideal choice for routine maintenance, providing a cost-effective OEM-quality replacement that restores engine performance, fuel efficiency, and smooth idle characteristics.