Spark plug · NGK
Equivalents for the NGK spark plug 3975
The NGK 3975 spark plug. 108 equivalents listed: interchangeable and compatible spark plugs across all brands — NGK, Bosch, Champion, Denso…
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What can replace a NGK 3975 spark plug?
The NGK 3975 is interchangeable with: NGK BP4H, Bosch W 7 BC, Champion L82YC, NGK BP6H, NGK BP4HS, NGK BP6HS. 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.