Spark plug · NGK
Equivalents for the NGK spark plug 6021
NGK 6021, a spark plug. Compare its 74 equivalents and find the cheapest compatible plug: NGK, Bosch, Champion, Denso and more.
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What can replace a NGK 6021 spark plug?
The NGK 6021 is interchangeable with: NGK BM4A, Bosch WS 8 E, Champion CJ8, NGK BM6A, Bosch WS 9 EC, Champion CJ11. 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.