Autolite AP5426 Spark Plug

Autolite Platinum Spark Plug AP5426

Autolite Platinum Spark Plug AP5426 is built for drivers who need a direct-fit ignition component with OE-style form, fit, and function. It uses platinum on the center electrode for added durability versus standard copper plugs, along with a pre-gap of 0.050 in. (1.30 mm) for the listed applications.

Compatible With Jeep Wrangler, Chrysler Town & Country, Dodge Grand Caravan, Volkswagen Routan, Chrysler Pacifica, Dodge Caravan, and Chrysler Voyager applications listed below, this spark plug supports consistent ignition performance across a wide range of 2001-2011 vehicles.

Key Features

• Platinum center electrode tip material and platinum center electrode core material
• 0.050 in. / 1.30 mm pre-gap for listed applications
• Resistor type spark plug with 4000 resistance
• Tapered seat type with 14.0 mm thread diameter
• Extra-long ceramic insulator for ignition system fitment
• Single ground electrode with nickel core and nickel tip material
• 5/8 in. hex size and stud terminal type

Product Line Details

Autolite Platinum Spark Plugs are positioned as an OE-style replacement line for everyday driving needs. The platinum construction is used to improve durability compared with standard copper plugs, while maintaining the fitment and operating characteristics expected in factory-style ignition service.

Detailed Description

Autolite AP5426 is a platinum spark plug for secondary ignition service, engineered with a standard regular center electrode design, ceramic insulator, and tapered ground electrode tip design. The plug’s 0.982 in. reach, 14.0 mm thread diameter, and tapered seat help match the listed Chrysler, Dodge, Jeep, and Volkswagen applications. For drivers searching for a Jeep Wrangler spark plug AP5426 or a Chrysler Town & Country platinum spark plug, this part number aligns with the specified OE-style replacement needs.

This part cross-references AMS Automotive 4120 for the same application.

What It Helps Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent spark delivery
• Reduced throttle response during acceleration
• Fuel economy loss related to ignition wear
• Misfire concerns tied to aged or fouled plugs

Installation Notes and Tips

• Verify the vehicle’s required spark plug gap before installation; listed applications include 0.050 in. (1.3 mm) and one 2008 Chrysler Pacifica application at 0.035 in. (0.9 mm).
• Confirm thread diameter, reach, seat type, and terminal style match the engine specification.
• Use proper spark plug service procedures to avoid cross-threading or insulator damage.
• Check ignition coil condition and plug wire condition during service to help maintain consistent performance.

Quality Assurance

Autolite supplies ignition products for automotive aftermarket and original equipment applications, with OE form, fit, and function as a core product standard. AP5426 is built to meet the dimensional and material requirements listed for the supported vehicles, including Jeep Wrangler, Chrysler Town & Country, and Dodge Grand Caravan applications.

Compatible Vehicles

• Fits 2007-2011 Jeep Wrangler, N/A; spark plug gap: 0.050 inches (1.3 millimeters)
• Fits 2001-2010 Chrysler Town & Country, N/A; spark plug gap: 0.050 inches (1.3 millimeters)
• Fits 2001-2010 Dodge Grand Caravan, N/A; spark plug gap: 0.050 inches (1.3 millimeters)
• Fits 2009-2010 Volkswagen Routan, N/A; spark plug gap: 0.050 inches (1.3 millimeters)
• Fits 2008 Chrysler Pacifica, N/A; spark plug gap: 0.035 inch (0.9 mm)
• Fits 2005-2007 Chrysler Pacifica, N/A; spark plug gap: 0.050 inches (1.3 millimeters)
• Fits 2001-2007 Dodge Caravan, N/A; spark plug gap: 0.050 inches (1.3 millimeters)
• Fits 2001-2003 Chrysler Voyager, N/A; spark plug gap: 0.050 inches (1.3 millimeters)