Maintenance & Support

The success of Weichai is reinforced by the people who stand behind our products. Working with us means you receive end-to-end care of products and services and ensuring you're getting the most out of your investment. Our goal is maximum your satisfaction with the performance of Weichai products, services and our people.

    Maintanence & Service Manual:

    Coming soon ..

    Weichai Engine Diagnostic Software:

    The software is exclusively developed and researched by Weichai Power. Connected to ECU via DiagSmart, the device can transfer data to PC, smartphone via USB connection or Wifi. Through software, users can check the operating status of the engine, sensors as well as actuator components, can extract data files, data streams. It's supported the repair process as well as timely detection and handle big error.

    * DiagSmart 3.2.9 (updated Sep 2018 - Language: VN): Download

    * DiagSmart 3.2.15 (update for WP4.1N/WP4.6 - Language: EN-CN): Download


    Customer Assistance

    For general inquiries, questions regarding your Weichai products, or assistance locating authorized distributors or dealers, please complete the form below.

    Fill Out The Inquiry Form

    Or you can reach us by phone:


    Hanoi Office: R1703, Charm Vit Tower, 117 Tran Duy Hung, Cau Giay Dist, Hanoi,

    Tel: +84 24 3726 3911

    HCM Office: R702, Dai Minh Convention Tower, 77 Hoang Van Thai, Tan Phu Ward, Dist. 7, HCMC,

    Tel: +84 28 5416 5181


    Hotline: 1800 6323