Spark plug · NGK
Equivalents for the NGK spark plug 5521
NGK 5521 is a spark plug. 22 equivalents listed: interchangeable and compatible spark plugs across all brands — NGK, Bosch, Champion, Denso…
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22 equivalents compatible with the NGK 5521 spark plug
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What can replace a NGK 5521 spark plug?
The NGK 5521 is interchangeable with: NGK PFR6B, Bosch FR 7 DPP33, Champion RC 8 PYP, NGK PFR6Q, NGK VLine37, Bosch FR 7 KPP33+. 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.