Autolite APP5263 Spark Plug

Autolite APP5263 Double Platinum Spark Plug

Autolite APP5263 is a Double Platinum spark plug built for OE-style fitment and consistent ignition performance. It uses platinum on both firing surfaces for longer service life, easier starts, quicker acceleration, and improved fuel efficiency in a wide range of domestic applications.

Compatible With vehicles such as the Chevrolet Impala, GMC Terrain, and Buick Enclave, this spark plug follows OE form, fit, and function requirements for many GM, Chrysler, Dodge, Jeep, and Saturn applications.

Key Features

• Double platinum firing design for extended spark plug life
• Platinum center electrode tip and platinum ground electrode tip
• 0.040 in. pre-gap with resistor design
• 14 mm thread diameter, 5/8 in. hex size, tapered seat
• Ceramic insulator with mid-projection tip style
• OE-style replacement for foreign and domestic vehicles

Product Details

The Autolite Double Platinum Spark Plug line is built for drivers who want a direct OE-style replacement with stable ignition characteristics. APP5263 uses a platinum-to-platinum firing setup to help maintain consistent spark performance over time, while the standard electrode design and tapered seat support proper installation in the specified applications. This part number, APP5263, is commonly searched for fitment on Chevrolet Impala, Buick Enclave, and GMC Terrain models, along with many other GM and Chrysler-family vehicles listed below.

This part cross-references DENSO Auto Parts 4718 and NGK 4998 for the same application.

What It Helps Address

• Hard starting caused by worn spark plugs
• Rough idle from weak or inconsistent ignition
• Slow throttle response during acceleration
• Reduced fuel economy from degraded spark performance
• Misfire concerns related to plug wear or incorrect gap

Installation Notes

Verify the specified gap for your exact vehicle before installation; listed applications include 0.035 in., 0.040 in., 0.043 in., 0.044 in., 0.045 in., 0.049 in., 0.050 in., and 0.060 in. depending on the application. Use the vehicle-specific notes for your year, make, and model, and confirm thread diameter, reach, seat type, and terminal style match the original plug. Fits 2012-2019 Chevrolet Impala, N/A; Fits 2010-2017 GMC Terrain, N/A; Fits 2008-2015 Buick Enclave, N/A; Fits 2007-2016 Chevrolet Malibu, N/A; Fits 2007-2016 GMC Acadia, N/A.

Quality Assurance

Autolite supplies ignition products to the automotive aftermarket and original equipment manufacturers, and APP5263 is engineered to deliver OE form, fit, and function across its listed applications. The Double Platinum design supports long-term ignition consistency in vehicles such as the Chevrolet Impala, Buick Enclave, and GMC Terrain.