Bosch 8109 Spark Plug

Overview of Bosch OE Fine Wire Double Platinum Spark Plug 8109

The Bosch OE Fine Wire Double Platinum Spark Plug 8109 is engineered for reliable ignition performance in select Acura and Honda vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Double platinum electrodes for extended durability
• 6000 ohm resistance resistor to reduce electrical noise
• Copper core ground electrode and nickel-yttrium center electrode core for optimal conductivity
• Flat seat type with a 1.1 mm pre-gap size for precise spark delivery
• Compatible with 4-cycle engines in Acura and Honda models

Detailed Features and Specifications

This Bosch spark plug features a standard ground electrode tip design and configuration, utilizing a single ground electrode made from copper with a platinum and nickel-yttrium tip. The center electrode tip is platinum, supported by a nickel-yttrium and copper core, enhancing wear resistance and maintaining stable spark performance over time. The insulator is made of ceramic with a projected design, contributing to reliable insulation and heat dissipation. The spark plug has a thread diameter of 14 mm, a reach of 19 mm, and a hex size of 16 mm, fitting securely in compatible engines. The manufacturer heat range is 6, suitable for a range of operating conditions in Acura and Honda vehicles.

About the OE Fine Wire Double Platinum Product Line

The OE Fine Wire Double Platinum line from Bosch is designed to provide consistent ignition performance with enhanced electrode durability. Featuring fine wire platinum electrodes on both the center and ground sides, this product line aims to reduce electrode wear and maintain optimal spark efficiency. The double platinum design supports longer service intervals and stable engine operation, making it suitable for vehicles requiring precise ignition components.

Compatible Vehicles and Applications

• Acura models: MDX, RL, RSX, TL, TSX, CSX
• Honda models: Accord, Civic, CR-V, Element, Fit
• Designed for 4-cycle engines requiring a flat seat spark plug with a 1.1 mm pre-gap
• Ideal for replacement in vehicles originally equipped with Bosch OE Fine Wire Double Platinum spark plugs

Common Issues Addressed by Bosch Spark Plug 8109

• Engine misfires due to worn or fouled spark plugs
• Reduced fuel efficiency from inconsistent ignition
• Difficulty starting the engine in cold or variable conditions
• Rough idling or hesitation during acceleration
• Excessive emissions caused by incomplete combustion

Installation Notes and Tips

Ensure the spark plug gap is set to 1.1 mm before installation if adjustment is necessary. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended specification to avoid damage to the threads or improper sealing. The 16 mm hex size allows for standard spark plug socket compatibility. It is recommended to replace all spark plugs in the engine simultaneously to maintain balanced performance.

Quality Assurance and Warranty

Bosch OE Fine Wire Double Platinum Spark Plug 8109 is manufactured to meet OEM standards for fit, form, and function. The use of high-quality materials such as platinum and copper ensures durability and consistent performance. While specific warranty details may vary, Bosch products typically come with a limited warranty against defects in materials and workmanship when installed according to guidelines.