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Investment in Joint Ventures - Summary of Significant Joint Ventures (Detail)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Y & C Engine Co., Ltd. [member]    
Disclosure of joint ventures [line items]    
Principal activities Manufacture and sale ofheavy-duty diesel engines,spare parts and after-salesservices  
Place of incorporation PRC  
Percentage of interest held 34.40% 34.40%
MTU Yuchai Power Co., Ltd [member]    
Disclosure of joint ventures [line items]    
Principal activities Manufacture off-road dieselengines  
Place of incorporation PRC  
Percentage of interest held 35.70% 38.20%
Guangxi Purem Yuchai Automotive Technology Co., Ltd [member]    
Disclosure of joint ventures [line items]    
Principal activities Application development,production, sales andservice on engine exhaustcontrol systems  
Place of incorporation PRC  
Percentage of interest held 37.40% 37.40%