Bosch ZR6SII3320 Spark Plug

Overview of Bosch OE Fine Wire Double Iridium Spark Plug ZR6SII3320

The Bosch OE Fine Wire Double Iridium spark plug ZR6SII3320 is engineered for precision ignition performance in select Mercedes-Benz models. Designed with advanced materials and a tapered ground electrode tip, this spark plug supports efficient combustion and reliable engine operation.

• Double iridium center and ground electrode tips for enhanced durability
• Tapered ground electrode tip design with copper core for optimal conductivity
• Standard ground configuration with a single ground electrode
• Pre-gap size of 0.7 mm for precise spark delivery
• Flat seat type with 14 mm hex size and 26.5 mm reach
• Resistor type spark plug with 1000 ohm resistance to reduce electrical noise
• Ceramic projected insulator for improved heat dissipation
• Compatible with 4-cycle engines in various Mercedes-Benz models

Detailed Product Description

The Bosch OE Fine Wire Double Iridium spark plug ZR6SII3320 features a center electrode tip made from iridium, supported by a nickel-yttrium and copper core, which provides excellent wear resistance and stable spark performance. The ground electrode tip combines platinum-iridium with nickel-yttrium and copper, enhancing longevity and consistent ignition. The tapered design of the ground electrode tip improves flame kernel growth and combustion efficiency. With a manufacturer heat range of 6 and a flat seat type, this spark plug is engineered to meet the specific thermal and mechanical requirements of Mercedes-Benz vehicles such as the C300, E350, CLS63 AMG, and G63 AMG.

The ceramic projected insulator ensures effective heat control and electrical insulation, while the resistor built into the plug reduces radio frequency interference, protecting sensitive vehicle electronics. The 14 mm hex size and 26.5 mm reach make installation straightforward for compatible engines. This spark plug is designed for 4-cycle engines and is supplied individually.

OE Fine Wire Double Iridium Product Line

The Bosch OE Fine Wire Double Iridium line focuses on delivering precise ignition performance through the use of fine wire iridium electrodes on both the center and ground sides. This design reduces voltage requirements and improves ignitability, which can contribute to smoother engine operation and better fuel efficiency. The double iridium construction also enhances electrode durability, making these plugs suitable for high-performance and luxury vehicles like Mercedes-Benz models.

Applications and Problem Solving

• Restores consistent ignition in Mercedes-Benz C300, E350, CLS63 AMG, and other compatible models
• Reduces misfires caused by electrode wear or fouling
• Improves fuel efficiency by ensuring optimal spark delivery
• Minimizes radio frequency interference affecting vehicle electronics
• Supports stable engine performance under various driving conditions

Installation Notes and Tips

• Verify compatibility with your specific Mercedes-Benz model and engine type before installation
• Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage
• Check and adjust the pre-gap if necessary, though the plug comes pre-gapped at 0.7 mm
• Inspect the spark plug hole for debris before installation to ensure proper seating
• Replace spark plugs in sets to maintain balanced engine performance

Quality Assurance and Warranty

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