Spark plug · Motorcraft
Equivalents for the Motorcraft spark plug R4C
Motorcraft R4C is a spark plug. Here are its 39 cross-references: equivalent, compatible and replacement plugs from NGK, Bosch, Champion, Denso and other makers.
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What can replace a Motorcraft R4C spark plug?
The Motorcraft R4C is interchangeable with: NGK AB6, Champion D14, Denso MW17, Champion RD9, Champion D14M, Champion D14013. These spark plugs share the same mounting (thread, seat) and heat range.
Cross-references and specifications are provided for guidance only. The wrench size can vary by brand, and some data is inferred from the plug code or an equivalent reference. Always check the vehicle manufacturer's recommendation before buying and fitting.