「恒信車專業」廠房設於觀塘偉業街171A偉業工業大廈地下 服務包括 (**詳細服務內容以「恒信」最新發表為準) : 定期安全檢查及保養 (每隔5,000公里或四個月) 檢查包括以下項目 引擎                                           冷卻系統 -  檢查漏油                                 - 檢查水箱漏水 -         更換機油及油隔                   - 檢查水喉 -         更換火咀、風隔、電油隔 -         檢查點火，火咀線                傳動系統 -         檢查皮帶，調較張力           - 檢查／更換波箱油 -         調較迨速及火位                    - 檢查漏油 -         檢查機器膠                           - 檢查極力子虛位 -         檢查排氣喉                           - 檢查離合器油                                                    - 檢查尾牙油 轉向系統                                   制動系統 -         檢查軑尺和尚頭虛位            - 檢查前後剎車片厚度 -         檢查漏油                               - 清洗粉末 -         檢查連杆                               - 調較手掣行程 -         檢查防塵膠蓋                        - 檢查迫力油                                                                                     - 檢查迫力喉                                                    - 檢查剎車系統漏油                                                    - 檢查前後分泵活動情況 縣掛系統                                   電器系統 -         檢查和尚頭虛位                    - 檢查照明系統 -         檢查避震機漏油                    - 檢查水撥功能 -         檢查膠柸士                           - 檢查電池 -         檢查穩定杆柸士                    - 檢查充電系統 輪胎狀況                                   道路測試