Notes: 23875-010000 PLUG, R01 is original YANMAR product. 23875-010000 PLUG, R015 is commonly used in transmissions/axles/engines 4TNE92-BRTL, 4TNE98-BQMFK, 4TNE98-BQFLC, 4TNE98-BQSNMS, 4TNE98-SNMU, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849