Spark plug · NGK
Equivalents for the NGK spark plug 99404
NGK 99404 is a spark plug. All its 80 replacement references: compatible and interchangeable equivalents — NGK, Bosch, Champion, Denso…
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What can replace a NGK 99404 spark plug?
The NGK 99404 is interchangeable with: NGK BKR6EIX, Bosch FR 7 KI332S, Denso K20PSR-B8, NGK BCPR6EIX, NGK BKR6EIX-P, NGK BKR6EIX-LPG. 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.