Spark plug · NGK
Equivalents for the NGK spark plug 4737
NGK 4737 is a spark plug. Browse its 58 equivalents: compatible, interchangeable and replacement spark plugs across NGK, Bosch, Champion, Denso and many more.
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What can replace a NGK 4737 spark plug?
The NGK 4737 is interchangeable with: NGK BR7HS, Bosch WR 5 AC, Champion RL78C, NGK BR8HS, Bosch WR 6 AC, Champion QL78C. 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.