Bosch 8117 Spark Plug

Bosch OE Fine Wire Double Platinum Spark Plug 8117

Bosch 8117 is an OE Fine Wire Double Platinum spark plug built for steady ignition performance and extended service life. It uses platinum on the center electrode and a platinum inlay on the ground electrode to help reduce gap erosion while maintaining OE-style operation.

Compatible With select Buick Lucerne, Chevrolet Impala, Chevrolet Malibu, Pontiac G6, and Saturn Vue applications, Bosch 8117 is a direct-fit spark plug for vehicles that call for a tapered-seat, preset-gap design. The fine-wire platinum construction supports consistent spark delivery in demanding daily driving conditions.

Key Features

• OE Fine Wire Double Platinum design for OE-style ignition performance
• Platinum center electrode and platinum ground electrode inlay
• Preset 1.1 mm gap; do not gap before installation
• Resistor spark plug with 6000 resistance
• Tapered seat, projected insulator, and standard ground configuration
• Nickel-yttrium and copper core materials for stable operation
• Bosch 8117 spark plug engineered for long wear and reduced gap erosion

Detailed Description

Bosch OE Fine Wire Double Platinum spark plugs are built around OE spark plug technology, using platinum at both the firing point and the ground electrode contact area. That construction helps maintain electrode shape over time and supports reliable ignition performance across a wide range of GM applications. The Bosch 8117 is a tapered-seat, 14 mm spark plug with a 17.5 mm reach, 16 mm hex, projected insulator, and preset 1.1 mm gap.

This part number is commonly selected for vehicles such as the Chevrolet Impala, Chevrolet Malibu, Pontiac G6, and Buick Lucerne when the engine calls for a double platinum plug. Bosch 8117 also appears in fitment for several Chevrolet, GMC, Pontiac, Saturn, Buick, Cadillac, and Oldsmobile models across multiple model years. This part cross-references AC Delco 41-103 for the same application.

Common Issues This Part Can Help Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weak or inconsistent spark output
• Misfire conditions related to excessive plug wear
• Reduced fuel economy from degraded ignition performance
• Loss of throttle response from aging secondary ignition components

Installation Notes and Tips

• Do not gap this plug; the gap is preset from the factory.
• Verify the engine calls for a tapered-seat, 14 mm, 17.5 mm reach plug before installation.
• Use the vehicle service specification for torque and ignition service procedures.
• Inspect coils, boots, and wires during spark plug replacement to avoid repeat misfire concerns.
• For fitment, Bosch 8117 is listed for applications including Fits 2006-2011 Chevrolet Impala, N/A and Fits 2009-2011 Buick Lucerne, N/A.

Quality Assurance

Bosch manufactures this spark plug to meet Original Equipment specifications for double platinum applications. The OE Fine Wire Double Platinum design is focused on durability, stable ignition performance, and long service life in the vehicles listed above.