Bosch 8519 Spark Plug

Bosch EVO 8519 Spark Plug Overview

Bosch EVO 8519 is a secondary ignition spark plug built for modern gasoline engines that demand stable ignition under high cylinder pressure and elevated combustion temperatures. It uses an iridium center electrode, platinum ground tip, and a fine-wire electrode design to support consistent spark delivery in turbocharged direct-injection applications.

The Bosch EVO line focuses on OE-level construction and durability for engines that place greater stress on the ignition system. For Volkswagen Golf, Volkswagen Jetta, Volkswagen Golf SportWagen, and Audi A3 Sportback e-tron applications, Bosch 8519 is a direct-fit spark plug option for the listed model years.

Key Features

• Iridium center electrode tip for precise spark delivery
• Platinum ground electrode tip for wear resistance
• Fine-wire center electrode design for efficient ignition
• High dielectric strength rated above 45 kV
• Improved insulator design for resistance to irregular combustion events
• Resistor spark plug with 1000 ohm resistance
• 12 mm thread diameter, 16 mm hex size, flat seat
• Projected ceramic insulator for modern engine applications

Product Details

Bosch EVO 8519 is engineered for engines that require dependable ignition performance over a long service life. The copper-core center and ground electrode construction, combined with iridium and platinum tip materials, supports stable combustion in demanding conditions. This spark plug is built for 4-cycle gasoline engines and uses a J-gap ground configuration with a tapered ground electrode tip.

For fitment-based searches, Bosch 8519 is used in 2013-2021 Volkswagen Jetta, 2019-2021 Volkswagen Golf, 2019 Volkswagen Golf SportWagen, and 2016-2018 Audi A3 Sportback e-tron applications. If you are replacing worn plugs in a Volkswagen Golf or Volkswagen Jetta, Bosch EVO 8519 matches the listed OE-style application requirements.

What It Helps Address

• Hard starting caused by worn or inconsistent spark plugs
• Misfire conditions related to electrode wear
• Rough idle from weakened ignition output
• Combustion instability in turbocharged gasoline direct injection engines
• Service intervals affected by plug degradation

Installation Notes

Verify the engine code and plug specification before installation. Confirm the 12 mm thread diameter, 16 mm hex size, 20.5 reach, and .75 pre-gap against the vehicle service data. Use proper spark plug handling and torque procedures to protect the ceramic insulator and threaded cylinder head. Bosch 8519 should be installed only in applications listed in the fitment data.

Quality Assurance

Bosch EVO spark plugs are produced to the same quality standards associated with original equipment spark plugs. The EVO design adds higher dielectric strength and an updated insulator structure to handle demanding combustion conditions found in modern engines. This part cross-references no additional part numbers in the provided data.