Bosch 9747 Spark Plug

Overview of Bosch OE Fine Wire Iridium Spark Plug 9747

The Bosch OE Fine Wire Iridium spark plug 9747 is engineered for reliable ignition performance in Mini Cooper, Cooper Countryman, and Cooper Paceman models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine responsiveness.

• Iridium center electrode tip for enhanced durability and consistent spark
• Copper ground electrode core material for improved conductivity
• Standard ground electrode tip and configuration for reliable ignition
• 6000 ohm resistance to reduce electrical noise
• Pre-gap size of 0.8 mm optimized for 4-cycle engines
• Flat seat type with 14 mm hex size for secure installation
• Projected ceramic insulator for better heat dissipation
• Thread diameter of 12 mm and reach of 26.5 mm for precise fitment

Detailed Product Description

This Bosch spark plug, part number 9747, belongs to the OE Fine Wire Iridium line, which focuses on fine wire iridium technology to provide consistent ignition and long service life. The iridium center electrode tip combined with a nickel-yttrium core material ensures stable spark delivery and resistance to electrode wear. The ground electrode tip is constructed from a combination of platinum, nickel-yttrium, and copper, enhancing durability and conductivity. The ceramic insulator is projected to improve heat management, while the resistor built into the plug minimizes radio frequency interference. With a manufacturer heat range of 5 and a flat seat design, this spark plug is engineered to meet the specific ignition requirements of Mini Cooper vehicles.

Compatible Vehicles and Applications

This spark plug is compatible with the following Mini models:

• Mini Cooper
• Mini Cooper Countryman
• Mini Cooper Paceman

It is designed specifically for 4-cycle engines and is not intended for outdoor power equipment applications.

Common Issues Addressed by Bosch Spark Plug 9747

• Engine misfires and rough idling
• Reduced fuel efficiency due to incomplete combustion
• Difficulty starting the engine
• Increased exhaust emissions
• Loss of engine power and acceleration

Installation Notes and Tips

When installing the Bosch OE Fine Wire Iridium spark plug 9747, ensure the pre-gap size of 0.8 mm is maintained for optimal performance. Use a 14 mm socket wrench to tighten the spark plug securely without over-torquing. Verify the flat seat type matches the engine’s cylinder head design. It is recommended to replace all spark plugs simultaneously to maintain balanced engine operation. Always consult the vehicle’s service manual for specific torque specifications and installation procedures.

Quality Assurance and Warranty

Bosch OE Fine Wire Iridium spark plugs are manufactured to meet strict quality standards, ensuring reliable ignition and long service life. The use of premium materials such as iridium and platinum contributes to consistent performance under various operating conditions. While specific warranty details are not provided here, Bosch typically offers coverage against manufacturing defects. For warranty information, refer to Bosch’s official documentation or authorized service centers.