Bosch FR7NII35S Spark Plug

Overview of Bosch FR7NII35S Spark Plug

The Bosch FR7NII35S spark plug is engineered for reliable ignition performance in select Hyundai, Lexus, Toyota, and Volvo vehicles. Featuring advanced iridium and platinum materials, this spark plug supports efficient combustion and consistent engine operation.

• OE Fine Wire Double Iridium Pin-to-Pin design for enhanced durability
• Iridium center electrode with nickel-yttrium and copper core
• Platinum-iridium and nickel-yttrium ground electrode tip
• Standard ground configuration with a single ground electrode
• Flat seat type with a 14mm thread diameter and 26.5mm reach
• Pre-gap size of 0.7mm optimized for 4-cycle engines
• Resistor value of 3000 ohms to reduce electrical interference
• Hex size of 16mm for standard installation tools

OE Fine Wire Double Iridium Pin-to-Pin Product Line

The OE Fine Wire Double Iridium Pin-to-Pin line by Bosch is designed to provide precise ignition performance through the use of fine wire iridium electrodes combined with platinum-iridium ground tips. This construction improves wear resistance and maintains stable spark gaps over time, contributing to consistent engine efficiency and reduced misfires. The pin-to-pin ground electrode tip design further enhances spark reliability in demanding driving conditions.

Technical Details and Features

The FR7NII35S spark plug incorporates a ceramic insulator that is non-projected, ensuring optimal insulation and heat dissipation. The center electrode is made from iridium with a nickel-yttrium and copper core, which offers a balance of conductivity and durability. The ground electrode tip combines platinum-iridium and nickel-yttrium materials, designed to withstand high temperatures and reduce electrode wear. With a manufacturer heat range of 7, this spark plug is suitable for a variety of engine operating conditions. The flat seat type and 14mm thread diameter ensure compatibility with specified vehicle models.

Compatible Vehicles and Applications

• Hyundai models including Genesis Coupe and Tucson
• Lexus models such as ES350, GS350, IS300, and RX350
• Toyota models including Avalon, Camry, Highlander, Sienna, and Tacoma
• Volvo models like C30, S60, V60, XC60, and XC70

This spark plug is designed for 4-cycle engines and is not intended for outdoor power equipment applications.

Common Issues Addressed by Bosch FR7NII35S

• Engine misfires due to worn or inefficient spark plugs
• Reduced fuel efficiency caused by incomplete combustion
• Difficulty starting the engine in cold or variable conditions
• Rough idling or hesitation during acceleration
• Excessive electrode wear leading to ignition instability

Installation Notes and Tips

When installing the Bosch FR7NII35S spark plug, ensure the pre-gap size of 0.7mm is maintained for optimal performance. Use a 16mm socket wrench to tighten the spark plug to the manufacturer’s recommended torque specifications. The flat seat design requires proper seating to avoid compression leaks. It is advisable to replace all spark plugs in the engine simultaneously to maintain balanced ignition performance.

Quality Assurance and Warranty

Bosch spark plugs, including the FR7NII35S, are manufactured to meet strict OEM standards for quality and durability. The use of premium materials such as iridium and platinum ensures long service life and consistent performance. While specific warranty details are not provided here, Bosch products typically come with manufacturer-backed quality guarantees to support reliability in automotive ignition systems.