Bosch 9609 Spark Plug

Overview of Bosch OE Fine Wire Double Iridium Spark Plug 9609

The Bosch OE Fine Wire Double Iridium Spark Plug 9609 is engineered for reliable ignition performance in a range of vehicles including Hyundai, Nissan, Toyota, and more. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Double iridium center and ground electrode tips for durability
• Tapered ground electrode tip design for improved spark exposure
• Flat seat type with a 14mm thread diameter and 26.5mm reach
• Resistor type spark plug with 6000 ohms resistance to reduce electrical noise
• Pre-gap size of 1.1 mm optimized for 4-cycle engines
• Ceramic insulator with non-projected design for heat resistance
• Hex size 16 mm for standard installation tools
• Manufacturer heat range rating of 8 for balanced thermal performance

Detailed Product Description

The Bosch OE Fine Wire Double Iridium spark plug 9609 features a center electrode tip made from iridium, supported by a nickel-yttrium and copper core for enhanced conductivity and longevity. The ground electrode tip combines platinum-iridium and nickel-yttrium materials, providing a tapered design that optimizes spark exposure and combustion efficiency. This spark plug has a flat seat type and a thread diameter of 14 mm with a reach of 26.5 mm, making it compatible with various models from Hyundai, Infiniti, Kia, Nissan, Scion, Suzuki, and Toyota.

The resistor built into the spark plug reduces electromagnetic interference, ensuring stable engine electronics operation. Its ceramic insulator is non-projected, contributing to heat resistance and durability under demanding engine conditions. The pre-gap size of 1.1 mm is factory set to meet the ignition requirements of 4-cycle engines, supporting smooth starts and consistent power delivery.

About the OE Fine Wire Double Iridium Product Line

The Bosch OE Fine Wire Double Iridium line is designed to provide enhanced ignition performance through the use of fine wire electrodes made from durable iridium and platinum alloys. This product line focuses on delivering precise spark control, improved fuel efficiency, and extended service life compared to conventional spark plugs. The 9609 spark plug exemplifies these qualities with its double iridium tips and advanced electrode materials.

Applications and Common Issues Addressed

• Replacement for worn or fouled spark plugs in Hyundai Sonata, Nissan Altima, Toyota Camry, and similar models
• Helps resolve engine misfires and rough idling
• Improves cold start performance and throttle response
• Reduces spark plug wear in high-heat or high-mileage conditions
• Minimizes electromagnetic interference affecting vehicle electronics

Installation Notes and Tips

• Ensure the spark plug gap is set to 1.1 mm before installation if adjustment is necessary
• Use a 16 mm socket wrench for proper torque application
• Apply anti-seize compound sparingly on threads to prevent galling
• Follow manufacturer torque specifications to avoid damage to the cylinder head
• Inspect ignition coils and wiring for wear during replacement

Quality Assurance and Warranty

Bosch OE Fine Wire Double Iridium spark plugs are manufactured to meet strict OEM standards for fit, form, and function. The 9609 spark plug undergoes rigorous quality control to ensure consistent performance and durability. While specific warranty terms may vary, Bosch typically offers coverage against manufacturing defects, supporting reliability for your Hyundai, Nissan, Toyota, and other compatible vehicles.