Spark plug · NGK
Equivalents for the NGK spark plug B-4H
NGK B-4H is an automotive spark plug. Browse its 68 equivalents: compatible, interchangeable and replacement spark plugs across NGK, Bosch, Champion, Denso and many more.
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What can replace a NGK B-4H spark plug?
The NGK B-4H is interchangeable with: NGK B4H, Bosch W 9 AC, Champion L88A, NGK B4HS, Bosch W 10 AC, Champion L90C. 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.