Spark plug · NGK
Equivalents for the NGK spark plug 3961
NGK 3961 is a spark plug. Find its 78 compatible and interchangeable spark plugs: cross-references for NGK, Bosch, Champion, Denso and every brand.
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What can replace a NGK 3961 spark plug?
The NGK 3961 is interchangeable with: NGK BR7ES, Bosch WR 5 C+, Champion RN2C, NGK BR8ES, NGK BR7ES-D, Bosch WR 5 CC. 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.