Bosch 9604 Spark Plug

Overview of Bosch OE Fine Wire Double Iridium Spark Plug 9604

The Bosch OE Fine Wire Double Iridium Spark Plug 9604 is engineered for reliable ignition performance in a variety of vehicles including Acura, Honda, Ford, and Jeep models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine responsiveness.

• Double iridium center and ground electrode tips for durability
• 6000 ohm resistance resistor to reduce electrical noise
• Tapered ground electrode tip with standard ground configuration
• Flat seat type with 19mm reach and 14mm thread diameter
• Compatible with 4-cycle engines in multiple vehicle makes and models

Detailed Product Features and Specifications

This Bosch spark plug features a fine wire double iridium design, combining iridium center electrode tips with platinum-iridium and nickel-yttrium ground electrode tips. The center electrode core is made from nickel-yttrium and copper, enhancing conductivity and heat dissipation. The ceramic insulator is projected and designed to withstand high temperatures, while the resistor with 6000 ohms reduces electromagnetic interference. The spark plug has a pre-gap size of 1.1 mm, a hex size of 16 mm, and a manufacturer heat range of 7, suitable for a wide range of ignition systems.

About the 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 electrodes made from durable iridium and platinum alloys. This product line is designed to provide consistent spark delivery, improved fuel efficiency, and extended service life compared to conventional spark plugs. The 9604 part number is a representative model within this line, optimized for secondary ignition applications in 4-cycle engines.

Compatible Vehicles and Common Applications

• Acura models such as CL, MDX, and TL
• Honda vehicles including Accord, Civic, CR-V, and Odyssey
• Ford trucks like the F-150 and Ranger
• Jeep models including Grand Cherokee and Wrangler
• Other makes such as Dodge Dakota, Ram 1500, Mazda MPV, and Mitsubishi Raider

Issues Addressed by Bosch Spark Plug 9604

• Misfiring or rough idling in compatible vehicles
• Reduced fuel efficiency due to incomplete combustion
• Difficulty starting engines in Acura, Honda, or Ford models
• Engine hesitation or loss of power under load
• Excessive spark plug wear leading to ignition problems

Installation Notes and Tips

Ensure the spark plug gap is set to the specified 1.1 mm pre-gap before installation. Use a 16 mm socket wrench to tighten the spark plug to the manufacturer’s torque specifications. The flat seat design requires proper seating to avoid compression leaks. It is recommended to replace spark plugs in sets to maintain consistent engine performance. Avoid over-tightening to prevent thread damage in the cylinder head.

Quality Assurance and Warranty

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