Bosch 7431 Spark Plug

Overview of Bosch OE Fine Wire Double Iridium Spark Plug 7431

The Bosch OE Fine Wire Double Iridium Spark Plug 7431 is engineered for reliable ignition performance in select Audi, Porsche, and Volkswagen models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Part Number: 7431
• Brand Line: OE Fine Wire Double Iridium
• Center Electrode Tip Material: Iridium
• Ground Electrode Tip Material: Platinum-iridium and nickel-yttrium
• Resistance: 6000 ohms
• Pre-Gap Size: 0.8 mm
• Thread Diameter: 12 mm
• Reach: 26.5 mm
• Seat Type: Flat
• Hex Size: 16 mm
• Insulator Material: Ceramic (Projected type)
• Manufacturer Heat Range: 6

About the OE Fine Wire Double Iridium Product Line

The OE Fine Wire Double Iridium line from Bosch features spark plugs with fine wire electrodes made from iridium and platinum alloys. This combination enhances durability and ignition efficiency, providing stable spark performance over extended service intervals. The double iridium design reduces electrode wear and supports consistent combustion, making it suitable for high-performance and luxury vehicles such as Audi, Porsche, and Volkswagen models.

Detailed Product Description

This Bosch spark plug 7431 incorporates a fine wire iridium center electrode and a platinum-iridium ground electrode tip, both supported by nickel-yttrium cores. The ceramic projected insulator improves voltage insulation and heat dissipation. With a resistance of 6000 ohms, it helps suppress electrical noise that can interfere with vehicle electronics. The flat seat and standard ground configuration ensure proper sealing and fitment. The 0.8 mm pre-gap size is optimized for efficient ignition in 4-cycle engines, and the heat range 6 rating matches the thermal requirements of compatible engines.

Compatible Vehicles and Applications

• Compatible with Audi Atlas and Atlas Cross Sport
• Fits Porsche Cayenne and Panamera models
• Suitable for Volkswagen Passat, Passat CC, Q7, and Touareg
• Designed for 4-cycle gasoline engines requiring a 12 mm thread diameter and 26.5 mm reach

Common Issues Addressed by Bosch Spark Plug 7431

• Misfires and rough idling due to worn or fouled spark plugs
• Reduced fuel efficiency from incomplete combustion
• Difficulty starting engines in cold conditions
• Engine hesitation or loss of power under load
• Electrical interference affecting onboard electronics

Installation Notes and Tips

Ensure the spark plug gap is set to 0.8 mm before installation if adjustment is necessary. Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage to the threads or seat. The 16 mm hex size allows for standard spark plug socket compatibility. Inspect the spark plug hole for debris before installation to ensure proper sealing. Replacement intervals should follow vehicle manufacturer recommendations for optimal performance.

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 premium materials such as iridium and platinum alloys ensures durability and consistent performance. While specific warranty details may vary, Bosch products typically come with a limited warranty covering defects in materials and workmanship.