Bosch ZQR8SI302 Spark Plug

Overview of Bosch OE Fine Wire Iridium Spark Plug ZQR8SI302

The Bosch OE Fine Wire Iridium spark plug, part number ZQR8SI302, is engineered for reliable ignition performance in Mini Cooper vehicles. Designed with precision materials and specifications, this spark plug supports efficient combustion and consistent engine operation.

• Compatible with Mini Cooper models
• Iridium center electrode tip for durability
• Copper ground electrode core for effective conductivity
• 6000 ohm resistance for noise suppression
• Flat seat type with 26.5 mm reach and 12 mm thread diameter
• Pre-gap size of 0.95 mm for optimal spark
• Hex size 14 mm for standard installation tools
• Projected ceramic insulator for improved insulation
• Manufacturer heat range rating of 8

Details on Bosch OE Fine Wire Iridium Spark Plug Features

The Bosch OE Fine Wire Iridium spark plug ZQR8SI302 features a platinum-iridium center electrode tip combined with a nickel-yttrium and copper core, enhancing electrode longevity and stable spark delivery. The ground electrode uses copper with a standard tip design and configuration, ensuring consistent spark gap and ignition reliability. The spark plug includes a 6000 ohm resistor to reduce electromagnetic interference, protecting vehicle electronics. Its flat seat and 26.5 mm reach are designed to fit Mini Cooper engines precisely, while the 14 mm hex size allows for straightforward installation and removal.

About the OE Fine Wire Iridium Product Line

The OE Fine Wire Iridium line by Bosch focuses on delivering spark plugs with fine wire iridium tips that provide precise ignition and extended service life. This product line balances durability and performance by using advanced materials such as platinum-iridium and nickel-yttrium alloys. The ZQR8SI302 spark plug exemplifies this approach, offering a combination of resistance, heat range, and electrode design tailored for specific vehicle applications like the Mini Cooper.

Applications and Common Issues Addressed

• Replacement for worn or fouled spark plugs in Mini Cooper engines
• Improves ignition stability and combustion efficiency
• Reduces misfires and rough idling
• Helps maintain fuel economy by ensuring proper spark timing
• Minimizes electromagnetic interference affecting vehicle electronics

Installation Notes and Tips

When installing the Bosch ZQR8SI302 spark plug, ensure the engine is cool to prevent thread damage. Use a torque wrench to tighten the spark plug to the manufacturer’s specifications, typically around 18-22 Nm for Mini Cooper applications. Verify the pre-gap size of 0.95 mm before installation, adjusting if necessary. The 14 mm hex size fits standard spark plug sockets, and the flat seat design requires proper seating to avoid compression leaks.

Quality Assurance and Warranty

Bosch spark plugs, including the OE Fine Wire Iridium ZQR8SI302, are manufactured to meet strict OEM standards for fit, form, and function. The use of high-quality materials such as ceramic insulators and iridium tips ensures durability and consistent performance. While specific warranty details may vary, Bosch typically offers coverage against manufacturing defects, supporting reliability for Mini Cooper ignition systems.