Equivalents for the Japko spark plug B121
Japko B121 is a spark plug — reach 15.2–19.0 mm, heat range hot. Find its 92 compatible and interchangeable spark plugs: cross-references for NGK, Bosch, Champion, Denso and every brand.
Technical information Japko B121 spark plug
- Resistor
- no
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What can replace a Japko B121 spark plug?
The Japko B121 is interchangeable with: Bosch GLP275, Champion CH273, Denso DG188, Champion CH273002, Denso DG-188, Beru 100226506. These spark plugs share the same mounting (thread, seat) and heat range.
What are the specifications of the Japko B121?
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.