Notes: 158553-51930 PLUG, M12 is original YANMAR product. 158553-51930 PLUG, M125 is commonly used in transmissions/axles/engines 4TNV94L-PLK2, 4TNV94L-PLK, 4TNV98-ZNTG, 4TNV98-ZNTGT, 4TNV98-ZNTGT, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849