Spark plug · Bosch
Equivalents for the Bosch spark plug WR 78
Meet the Bosch WR 78 spark plug. Compare its 17 equivalents and find the cheapest compatible plug: NGK, Bosch, Champion, Denso and more.
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17 equivalents compatible with the Bosch WR 78 spark plug
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What can replace a Bosch WR 78 spark plug?
The Bosch WR 78 is interchangeable with: Bosch WR 56, Champion CET8, Denso W16TT, Bosch WR 91, Bosch WR 78 X, Bosch WR 91 X. 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.