Spark plug · NGK
Equivalents for the NGK spark plug 6921
The NGK 6921 spark plug. Find its 1000 compatible and interchangeable spark plugs: cross-references for NGK, Bosch, Champion, Denso and every brand.
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1000 equivalents compatible with the NGK 6921 spark plug
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No equivalent for this brand selection.
What can replace a NGK 6921 spark plug?
The NGK 6921 is interchangeable with: NGK B6H, Bosch W5A, Champion J4, NGK B5HS, NGK B6HS, NGK B7HC. 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.