Bosch 8171 Spark Plug

Reliable Spark Plug for Ford E-350 Super Duty and F-Series Trucks

The Bosch OE Fine Wire Double Platinum Spark Plug 8171 is engineered to deliver consistent ignition performance for Ford vehicles including the E-350 Super Duty, F-150, F-250 Super Duty, F-350 Super Duty, Mustang, and Transit series. Designed for 4-cycle engines, this spark plug supports efficient combustion and engine reliability.

• Double platinum center and ground electrode tips for enhanced durability
• Standard ground electrode tip and configuration for reliable spark delivery
• 6000 ohm resistance resistor to reduce electrical noise
• Pre-gap size of 1.1 mm optimized for ignition efficiency
• Tapered seat type with 14 mm thread diameter and 25 mm reach
• Hex size 16 mm for standard installation tools
• Ceramic insulator material with non-projected design for heat resistance
• Manufacturer heat range rating of 6 suitable for various Ford engine conditions

About the Bosch OE Fine Wire Double Platinum Product Line

The OE Fine Wire Double Platinum line from Bosch features spark plugs with fine wire electrodes made of platinum on both the center and ground electrodes. This design improves wear resistance and maintains a stable spark over time, contributing to consistent engine performance and longer service intervals. The 8171 spark plug benefits from this technology, making it a suitable replacement part for Ford 4-cycle engines requiring durable ignition components.

Technical Details and Performance Features

The Bosch 8171 spark plug incorporates a platinum center electrode tip and a platinum-nickel-yttrium ground electrode tip, which enhances electrode longevity and reduces gap erosion. The nickel-yttrium and copper core center electrode supports efficient heat dissipation. With a resistance of 6000 ohms, this spark plug minimizes electromagnetic interference with vehicle electronics. The tapered seat and 25 mm reach ensure proper fitment and sealing in compatible Ford engines. The ceramic insulator provides excellent thermal insulation and durability under high combustion temperatures.

Compatible Ford Models and Common Applications

• Ford E-350 Super Duty ignition system maintenance
• Replacement spark plug for Ford F-150 and F-250 Super Duty engines
• Ignition component for Ford F-350 Super Duty trucks
• Suitable for Ford Mustang 4-cycle engines
• Ford Transit-150, Transit-250, Transit-350, and Transit-350 HD ignition repair

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 for proper tightening to avoid damage to the tapered seat. Confirm compatibility with your specific Ford model and engine type prior to installation. Avoid over-tightening to maintain the integrity of the spark plug and cylinder head threads.

Quality Assurance and Warranty

Bosch spark plugs are manufactured to meet OEM specifications and undergo rigorous quality control to ensure reliable performance. The OE Fine Wire Double Platinum 8171 spark plug is designed for durability and consistent ignition. Warranty details should be confirmed with the original equipment manufacturer or authorized distributor.