Bosch 8165 Spark Plug

Overview of Bosch OE Fine Wire Double Platinum Spark Plug 8165

The Bosch OE Fine Wire Double Platinum Spark Plug 8165 is engineered for precision ignition performance in a wide range of BMW models. Designed to meet OEM specifications, this spark plug ensures reliable combustion and consistent engine operation for vehicles such as the BMW 328i, 550i, and M3.

• Double platinum electrodes for enhanced durability and consistent spark
• Standard ground electrode tip and configuration for OEM compatibility
• Pre-gapped to 0.8 mm for optimal ignition timing
• Resistor type with 8000 ohms resistance to reduce electrical noise
• Flat seat type with 14 mm hex size for easy installation
• Reach of 26.5 mm and thread diameter of 12 mm for precise fitment
• Ceramic projected insulator for improved heat dissipation
• Manufacturer heat range rating of 5 suitable for various BMW engines

Detailed Product Description

The Bosch OE Fine Wire Double Platinum spark plug 8165 features a center electrode made of platinum with a nickel-yttrium core, paired with a ground electrode tip composed of platinum and nickel-yttrium. This combination provides enhanced wear resistance and stable spark delivery over the life of the plug. The ceramic insulator is projected and designed to withstand high temperatures, ensuring reliable ignition in 4-cycle engines. With a resistor value of 8000 ohms, this spark plug minimizes electromagnetic interference, protecting sensitive vehicle electronics.

The OE Fine Wire Double Platinum product line is specifically developed to offer a fine wire electrode design that reduces voltage requirements and improves ignitability. This line is ideal for modern BMW vehicles requiring precise ignition components that maintain engine efficiency and emissions compliance.

Compatible BMW Models and Applications

This spark plug 8165 is compatible with a broad range of BMW models, including but not limited to the 228i, 320i, 328i xDrive, 428i Gran Coupe, 528i, 550i GT xDrive, 650i Gran Coupe, 750Li xDrive, M2, M3, M4, M5, M6 Gran Coupe, X1, X3, X5, X6, and Z4. It is designed for 4-cycle engines requiring a flat seat spark plug with a 14 mm hex size and 26.5 mm reach.

Common Issues Addressed by Bosch Spark Plug 8165

• Engine misfires and rough idling due to worn or fouled spark plugs
• Reduced fuel efficiency caused by inconsistent ignition
• Difficulty starting the engine in cold or damp conditions
• Increased emissions from incomplete combustion
• Ignition system interference affecting onboard electronics

Installation Notes and Tips

Before installation, verify the spark plug gap is set to the recommended 0.8 mm pre-gap size. Use a torque wrench to tighten the spark plug to the manufacturer’s specifications to avoid damage to the threads or seat. The 14 mm hex size allows for standard spark plug socket compatibility. Ensure the spark plug is fully seated on the flat seat to maintain proper compression and prevent leaks.

Quality Assurance and Warranty

Bosch OE Fine Wire Double Platinum spark plugs are manufactured to meet strict OEM standards, ensuring consistent quality and performance. The use of premium materials such as platinum and nickel-yttrium alloys contributes to long service life and durability. While specific warranty details may vary, Bosch products typically come with a limited warranty covering defects in materials and workmanship.