Spark plug · NGK
Equivalents for the NGK spark plug 5509
NGK 5509 is an automotive spark plug. All its 93 replacement references: compatible and interchangeable equivalents — NGK, Bosch, Champion, Denso…
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What can replace a NGK 5509 spark plug?
The NGK 5509 is interchangeable with: NGK BCP7ET, Bosch FR 6 DDC, Champion RC7BMC, NGK BCPR7ET, NGK BKR7EKC, NGK BKUR7EK. 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.