Bosch 8516 Spark Plug

Overview

Bosch EVO spark plug 8516 is built for modern turbocharged gasoline direct injection engines that place higher demands on ignition stability. It uses an iridium fine-wire center electrode, platinum-tipped ground electrode, and a projected ceramic insulator to support consistent spark performance under severe combustion conditions.

Key Features

• Iridium fine-wire center electrode for precise spark delivery
• Platinum-tipped ground electrode with tapered J-gap design
• High dielectric strength construction for resistance to irregular combustion
• Resistor design for stable ignition performance
• Flat seat, 14 mm thread diameter, and 26.5 mm reach
• Developed to OE-level quality standards

Product Details

The Bosch EVO line is engineered for long service life in advanced engines, including turbocharged gasoline direct injection applications. Bosch 8516 combines a copper core center electrode, copper core ground electrode, and a projected ceramic insulator to help maintain reliable ignition when combustion conditions become more demanding. The 1000 ohm resistor and 45 kV-plus dielectric strength support spark control in engines that are sensitive to misfire and knock. This Bosch spark plug is a direct fit for select Audi S3, Volkswagen Golf R, and Volkswagen Arteon applications, and Bosch 8516 is identified for those EVO applications.

What It Helps Address

• Misfire caused by worn or heat-stressed spark plugs
• Hard starting and inconsistent ignition quality
• Combustion instability in turbocharged direct-injection engines
• Reduced spark efficiency from electrode wear
• Service replacement needs for OE-style ignition maintenance

Installation Notes

Verify thread diameter, reach, seat type, and heat range before installation. Use the vehicle service specification for gap and torque, and confirm the application matches the listed fitment for the Audi S3, Volkswagen Golf R, or Volkswagen Arteon. Bosch 8516 is a 4-cycle spark plug with a cup terminal and 16 mm hex size.

Quality Assurance

Bosch EVO spark plugs are developed and produced to the same quality level as original equipment spark plugs. The EVO design is intended for modern engines that require strong dielectric performance and stable ignition over a long service life.