Autolite APP3926 Spark Plug

Autolite Double Platinum Spark Plug APP3926

Autolite Double Platinum Spark Plug APP3926 is built for drivers who want OE-style ignition performance with platinum-to-platinum firing for longer service life. It supports easier starts, quicker acceleration, and improved fuel efficiency while matching the form, fit, and function expected in many foreign and domestic applications.

Key Features

• Double platinum firing for durable spark performance
• Platinum center electrode and platinum ground electrode tip
• 0.035 in. pre-gap size, 14 mm thread diameter, 0.750 in. reach
• Resistor spark plug with 4,000 ohm resistance
• Flat seat, 5/8 in. hex, stud terminal
• Ceramic insulator with mid-projection design

Product Details

The Autolite Double Platinum Spark Plug line is aimed at OE replacement needs where consistent ignition quality matters. Part number APP3926 uses platinum on both firing surfaces to help maintain stable spark delivery over time. That makes it a practical choice for vehicles that call for a 0.035 in. gap, including many Saturn, Mercedes-Benz, and Chevrolet applications. This part cross-references Hayden 2685 for the same application.

Common Uses

• Hard starting caused by worn spark plug electrodes
• Rough idle from weak or inconsistent ignition output
• Reduced throttle response during acceleration
• Fuel economy loss related to degraded spark performance
• Maintenance replacement for OE-style ignition service

Installation Notes

Verify the specified gap before installation and confirm the vehicle’s required gap setting in the service information. Compatible fitment includes Fits 1993-2002 Saturn SC1, Fits 2000-2002 Saturn SC2, Fits 1991-2002 Saturn SL, Fits 1991-2002 Saturn SL1, Fits 1991-1999 Saturn SL2, Fits 1993-1999 Saturn SW1, Fits 1993-1999 Saturn SW2, and Fits 1991-1992 Saturn SC. Additional fitment includes Fits 1987-1992 Chevrolet Camaro and Fits 1988-1991 Chevrolet Corvette with aluminum head applications, along with select Mercedes-Benz, Rolls-Royce, Bentley, Ford, Lincoln, and Mercury models listed in the fitment data. Use the vehicle’s OE specification for torque and gap settings.

Quality Assurance

Autolite supplies ignition products to the automotive aftermarket and original equipment manufacturers, and this spark plug is built to OE form, fit, and function standards for the listed applications. Part number APP3926 is engineered as a direct replacement option for service work on supported vehicles.