Autolite APP2545 Spark Plug

Autolite APP2545 Double Platinum Spark Plug

Autolite APP2545 is a Double Platinum spark plug for select Ford, Mercury, and Lincoln applications. It is listed for a wide range of 1983-1997 vehicles, including Ford Mustang, Ford Thunderbird, Mercury Cougar, and Lincoln Continental, with fitment notes that reference OE half-thread designs replaced by full-thread designs.

Key Features

• Double Platinum spark plug design for secondary ignition service
• Fits select Ford Mustang, Ford Thunderbird, Mercury Cougar, and related applications
• Listed gap specifications include .044 in/1.1 mm, .050 in/1.3 mm, and .054 in/1.4 mm depending on vehicle application
• Part number APP2545 for catalog and fitment lookup
• Compatible With 1983-1997 Ford, Mercury, and Lincoln models shown in the fitment table

Product Details

Autolite Double Platinum Spark Plug APP2545 is cataloged for older Ford, Mercury, and Lincoln engines that use the specified OE half-thread-to-full-thread replacement configuration. The fitment list covers applications such as 1987-1990 Ford Mustang, 1989-1995 Ford Thunderbird, 1993-1997 Mercury Cougar, and 1988-1994 Lincoln Continental. If you are searching for a replacement spark plug for a classic Ford Mustang, Thunderbird, or Cougar application, APP2545 is the part number to verify against your engine requirements.

This part cross-references no additional part numbers in the provided data.

Common Uses

• Rough idle caused by worn spark plugs
• Hard starting on older ignition systems
• Misfire conditions tied to plug wear or incorrect gap
• Reduced throttle response from degraded secondary ignition performance
• Maintenance replacement for listed Ford, Mercury, and Lincoln vehicles

Installation Notes

Verify engine code, plug thread style, and gap specification before installation. Fitment notes vary by application, including OE half-thread design replaced by full-thread design and different gap settings such as .044 in, .050 in, and .054 in. Confirm the vehicle year, make, and model against the fitment table for APP2545 before ordering.

Quality Assurance

Autolite APP2545 is a cataloged Double Platinum spark plug from Autolite, a recognized ignition parts brand. Use the listed fitment and specification notes to confirm correct application for your vehicle.