Notes: 24358-240310 O-RING, 524031 is original YANMAR product. 24358-240310 O-RING, 5240315 is commonly used in transmissions/axles/engines 4TNV86CT-KKTFK, 4TNV86CT-MKTFK, 4TNV84T-BMKTF, 4TNV84T-GMG, 4TNV86CT-DKK, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849