Spark plug · NGK
Equivalents for the NGK spark plug 6321
NGK 6321, a spark plug. Find its 259 compatible and interchangeable spark plugs: cross-references for NGK, Bosch, Champion, Denso and every brand.
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What can replace a NGK 6321 spark plug?
The NGK 6321 is interchangeable with: NGK BM7, Bosch W5E, Champion J5, NGK BM7A, NGK BMR7A, NGK BM7AVP1. 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.