Bosch 8515 Spark Plug

Reliable Ignition Performance for Acura, Hyundai, Kia, and Mitsubishi

The Bosch EVO 8515 spark plug is engineered to deliver consistent ignition performance for a range of vehicles including the Hyundai Elantra, Kia Forte, and Mitsubishi Lancer. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Part Number: 8515
• Brand Line: Bosch EVO
• Resistance: 6000 ohms for noise suppression
• Center Electrode Tip Material: Iridium for durability
• Ground Electrode Tip Material: Platinum with tapered design
• Ground Configuration: J-gap with a single ground electrode
• Pre-Gap Size: 0.7 mm
• Thread Diameter: 12 mm with 26.5 mm reach
• Hex Size: 16 mm with hex type wrench compatibility
• Insulator Material: Ceramic with projected insulator type
• Electrical Terminal Type: Non-removable nut
• Manufacturer Heat Range: 5
• Resistor Type: Yes, to reduce electromagnetic interference

About the Bosch EVO Spark Plug Line

The Bosch EVO line focuses on delivering advanced ignition components that combine durability and performance. The EVO 8515 spark plug incorporates fine wire iridium center electrodes and platinum ground electrodes to provide stable ignition and extended service life. This line is designed to meet the demands of modern 4-cycle engines, ensuring reliable starts and efficient fuel combustion.

Technical Details and Features

The Bosch EVO 8515 spark plug features a copper core for both the center and ground electrodes, enhancing thermal conductivity and heat dissipation. The tapered ground electrode tip with a J-gap configuration optimizes spark exposure and combustion efficiency. The ceramic insulator with a projected design improves voltage insulation and heat resistance. With a resistor built-in, this spark plug minimizes radio frequency interference, protecting vehicle electronics.

Compatible Vehicles and Applications

• Hyundai Elantra, Elantra GT, Kona, Sonata, Tucson, Veloster
• Kia Forte, Forte5, Optima, Seltos, Soul
• Acura RDX
• Mitsubishi Lancer

This spark plug is specifically designed for 4-cycle engines in these models, ensuring proper fitment and performance.

Common Issues Addressed by Bosch EVO 8515 Spark Plug

• Engine misfires and rough idling
• Poor fuel efficiency due to incomplete combustion
• Difficulty starting the engine
• Increased emissions from inefficient ignition
• Ignition noise and interference affecting electronics

Installation Notes and Tips

Ensure the spark plug gap is set to the recommended 0.7 mm pre-gap before installation. Use a 16 mm hex socket for proper torque application. The non-removable nut electrical terminal requires compatible ignition wires. Verify the 12 mm thread diameter and 26.5 mm reach match your vehicle’s specifications. Avoid over-tightening to prevent damage to the spark plug or cylinder head.

Quality Assurance and Warranty

Bosch manufactures the EVO 8515 spark plug to meet strict quality standards, using premium materials such as iridium and platinum for electrode tips. The resistor design reduces electromagnetic interference, supporting vehicle electronics. While specific warranty details are not provided, Bosch products typically adhere to industry quality controls and reliability benchmarks.