Bosch 8105 Spark Plug

Overview of Bosch OE Fine Wire Double Platinum Spark Plug 8105

The Bosch OE Fine Wire Double Platinum Spark Plug 8105 is engineered for reliable ignition performance in a variety of vehicles including Acura, BMW, Honda, Toyota, and more. Designed with durable platinum electrodes and a ceramic insulator, this spark plug supports efficient combustion and consistent engine operation.

• Double platinum electrodes for extended durability
• 6000 ohm resistor to reduce electrical interference
• Standard ground electrode tip and configuration
• Flat seat type with 14mm thread diameter and 19mm reach
• Compatible with multiple 4-cycle engines from popular makes and models

Detailed Features and Specifications

This Bosch spark plug features a center electrode tip made of platinum, combined with a nickel-yttrium and copper core for enhanced conductivity and wear resistance. The ground electrode tip also uses platinum and nickel-yttrium materials, contributing to longer service life. The insulator is made from high-quality ceramic with a projected design to improve spark exposure and combustion efficiency. With a pre-gap size of 1.1 mm and a manufacturer heat range of 8, this spark plug is optimized for stable ignition under various operating conditions. The 16mm hex size allows for standard installation tools, and the flat seat ensures proper sealing in the combustion chamber.

About the OE Fine Wire Double Platinum Product Line

The OE Fine Wire Double Platinum line by Bosch is designed to meet or exceed original equipment specifications. This product line focuses on fine wire electrodes that reduce voltage requirements and improve ignitability. The double platinum construction enhances electrode durability, making it suitable for vehicles requiring long-lasting spark plugs with consistent performance. The 8105 part number is a representative model within this line, offering a balance of durability and ignition efficiency for a wide range of applications.

Compatible Vehicles and Common Applications

• Acura models such as TL and MDX
• BMW 750iL, 850Ci, and 850i
• Honda Accord, Civic, CR-V, and Odyssey
• Toyota 4Runner, Corolla, Tacoma, and Tundra
• Other makes including Chrysler, Dodge, Hyundai, Isuzu, Jeep, Kia, Lexus, Mazda, Suzuki

Common Issues Addressed by Bosch Spark Plug 8105

• Engine misfires and rough idling
• Reduced fuel efficiency due to incomplete combustion
• Difficulty starting the engine in cold conditions
• Increased emissions from inefficient ignition
• Premature electrode wear affecting spark quality

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 1.1 mm as specified. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended torque to avoid damage to the threads or improper sealing. The 16mm hex size fits standard spark plug sockets. Ensure the engine is cool before replacing spark plugs to prevent thread galling. This spark plug is designed for 4-cycle engines and is not intended for outdoor power equipment.

Quality Assurance and Warranty

Bosch OE Fine Wire Double Platinum spark plugs are manufactured to meet strict quality standards, ensuring consistent performance and durability. The 8105 spark plug includes a built-in 6000 ohm resistor to minimize radio frequency interference. Bosch provides a limited warranty against defects in materials and workmanship, supporting reliability for the life of the spark plug under normal operating conditions.