Mopar SP138239AC Spark Plug

Mopar Spark Plug for Ram Heavy Duty Trucks

Mopar SP138239AC is an OE spark plug for select Ram heavy-duty applications. It is listed for Ram 2500 and Ram 3500 models across multiple model years, including 2014-2025 coverage for the Ram 2500 and Ram 3500, with specific fitment notes for certain applications.

Key Features

• Genuine Mopar spark plug, part number SP138239AC
• Secondary ignition component for factory-style engine service
• Fits 2022-2025 Ram 2500 and 2022-2025 Ram 3500
• Fits 2014-2019 Ram 2500, right cylinder head
• Fits 2014-2019 Ram 3500, right cylinder head
• 2020 Ram 3500 fitment noted as VH7120

Detailed Description

This Mopar spark plug is built for Ram truck owners who need the correct OE replacement for factory ignition service. Part number SP138239AC is cataloged for Ram 2500 and Ram 3500 applications, including 2022-2025 Ram 2500, 2022-2025 Ram 3500, and earlier 2014-2019 Ram heavy-duty models with right cylinder head fitment notes. This part cross-references Mopar 68138239AC for the same application.

What It Is Used For

• Replacing worn spark plugs during scheduled ignition maintenance
• Addressing rough idle caused by plug wear
• Restoring consistent spark delivery in Ram 2500 and Ram 3500 engines
• Correcting misfire-related drivability concerns tied to secondary ignition wear
• Maintaining factory-spec ignition service on compatible Ram heavy-duty trucks

Installation Notes and Tips

Verify engine and cylinder-head application before ordering, especially on 2014-2019 Ram 2500 and Ram 3500 listings that specify the right cylinder head. Confirm the vehicle year and model against the fitment data for SP138239AC before installation. Use proper spark plug service procedures and torque specifications from the vehicle service information.

Quality Assurance

Mopar OE parts are built for factory service applications and cataloged to match the listed Ram truck fitments for SP138239AC.