Spark plug · General Motors

Equivalents for the General Motors spark plug B103

Meet the General Motors B103 spark plug : heat range hot, reach 15.2–19.0 mm. Browse its 234 equivalents: compatible, interchangeable and replacement spark plugs across NGK, Bosch, Champion, Denso and many more.

Technical information General Motors B103 spark plug

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234 equivalents compatible with the General Motors B103 spark plug

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What can replace a General Motors B103 spark plug?

The General Motors B103 is interchangeable with: Bosch CH171, Champion W566, Denso G005, Bosch CH184, Bosch CH271, Bosch GLP003. These spark plugs share the same mounting (thread, seat) and heat range.

What are the specifications of the General Motors B103?

Reach 15.2–19.0 mm, Heat range Hot, Resistor no, Seat Flat (gasket)

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.