Bosch ZQR8SI302 Spark Plug

Bosch OE Fine Wire Iridium Spark Plug

Bosch ZQR8SI302 is an OE Fine Wire Iridium spark plug built for consistent ignition performance and extended service life. It uses an ultra-fine iridium center electrode firing pin, a projected ceramic insulator, and a resistor design for stable operation in modern 4-cycle engines.

Compatible with 2007-2010 Mini Cooper applications, this Bosch spark plug is specified with a preset gap and should not be regapped during installation. The OE Fine Wire Iridium line focuses on OE-style fit and electrode construction for dependable secondary ignition performance.

Key Features

• OE Fine Wire Iridium design with ultra-fine center electrode firing pin
• Platinum-iridium center electrode tip material
• Resistor spark plug with 6000 resistance
• Projected ceramic insulator for modern engine applications
• Flat seat design with 12 mm thread diameter and 14 mm hex size
• Preset .95 gap for direct replacement use
• Compatible With 2007-2010 Mini Cooper, N/A
• Part Number: ZQR8SI302

Detailed Description

Bosch OE Fine Wire Iridium spark plugs are engineered around OE spark plug technology, combining a fine-wire iridium firing pin with durable electrode materials to support reliable spark delivery. The nickel-yttrium and copper center electrode core, copper ground electrode core, and projected ceramic insulator are selected for stable ignition characteristics in 4-cycle engines. Bosch ZQR8SI302 is a direct-fit style spark plug for Mini Cooper models listed in the fitment data, with a preset gap and flat seat configuration.

The OE Fine Wire Iridium product line is aimed at drivers who need a replacement spark plug that follows original-equipment style construction and dimensions. For 2007-2010 Mini Cooper service, this plug matches the listed application and supports consistent ignition performance under normal operating conditions. Part number ZQR8SI302 may also be referenced during catalog lookup or service verification.

What This Spark Plug Helps Address

• Hard starting caused by worn or inconsistent spark plug electrodes
• Rough idle from degraded ignition performance
• Misfire conditions related to plug wear or incorrect gap settings
• Reduced throttle response from weak spark delivery
• Service intervals where OE-style replacement is required

Installation Notes and Tips

Install ZQR8SI302 only on the listed 2007-2010 Mini Cooper applications. The gap is preset, so do not gap the plug before installation. Verify the engine specification, thread reach, seat type, and heat range before service, and follow the vehicle manufacturer’s torque procedure for spark plug installation.

Because this is a resistor spark plug with a projected insulator and fine-wire electrode design, clean handling during installation helps protect the firing tip and threads. Confirm the part number ZQR8SI302 against the vehicle service information before final assembly.

Quality Assurance

Bosch manufactures this spark plug as part of its OE Fine Wire Iridium line, using iridium and platinum-iridium electrode materials for OE-style ignition performance and long-life construction. The design reflects Bosch’s focus on original-equipment level spark plug engineering for listed Mini Cooper applications.