Spark plug · Bosch
Equivalents for the Bosch spark plug FR 91
The Bosch FR 91 spark plug. Compare its 15 equivalents and find the cheapest compatible plug: NGK, Bosch, Champion, Denso and more.
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15 equivalents compatible with the Bosch FR 91 spark plug
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What can replace a Bosch FR 91 spark plug?
The Bosch FR 91 is interchangeable with: Bosch FR 56, Champion CET2, Denso K16TT, Bosch FR 78, Bosch FR 78 X, Bosch FR 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.