Government procurement case of the Baotou 3308 sewage treatment vehicle EHY5045TWCE6: Total Cost of Ownership (TCO) analysis and selection guide for 5-year, 8-year, and 10-year service life. In municipal sanitation applications, sewage treatment vehicles serve as core equipment for emergency sewage cleanup, pipeline maintenance, and urgent response operations; procurement decisions directly impact fiscal fund utilization efficiency and long-term operational costs. This article analyzes a real-world procurement case by a municipal sanitation department in Baotou—acquiring the 3308 sewage treatment vehicle (model: EHY5045TWCE6)—from a service-life perspective, conducting an in-depth TCO assessment across 5-, 8-, and 10-year timeframes, including major repair cycles and Chengli vehicle depreciation characteristics, and provides practical selection recommendations. Whether you are preparing for a government procurement tender or optimizing your existing fleet configuration, this case study offers actionable insights. I. Case Background: Overview of the Baotou 3308 Sewage Treatment Vehicle EHY5045TWCE6 Procurement In 2023, a municipal sanitation department in Baotou procured a 3308 sewage treatment vehicle via public tender to meet local drainage network maintenance requirements. The Chengli Special Purpose Vehicle Co., Ltd. model EHY5045TWCE6 was selected. Built on a Dongfeng chassis and compliant with China VI emission standards, this vehicle integrates suction, separation, and discharge functions, making it suitable for urban sewage wells, septic tanks, rivers, and similar applications. According to publicly available tender information, the procurement budget was capped at approximately RMB 499,000, with an actual unit price around RMB 430,000. Chengli’s direct-sales model delivered a competitive advantage in this procurement: compared to 4S-channel alternatives, cost savings of RMB 8,000–15,000 were achieved for identical configurations. During delivery, Chengli offered a rapid lead time of 7–15 days and leveraged Dongfeng’s nationwide chassis warranty plus lifetime upfit service support, ensuring swift commissioning. The vehicle has been in operation locally for over one year, with users reporting stable performance and convenient maintenance. II. Total Cost of Ownership (TCO) Analysis for 5-, 8-, and 10-Year Service Life Total Cost of Ownership (TCO) is the key economic indicator for evaluating municipal sanitation vehicles, encompassing initial acquisition cost, operating expenses (fuel/electricity, maintenance, labor), major repair costs, and residual value recovery. Below is a TCO projection for the Chengli EHY5045TWCE6 based on actual operational data from the Baotou case and industry benchmarks, covering 5-, 8-, and 10-year horizons. Cost Item Year 5 (RMB 10,000) Year 8 (RMB 10,000) Year 10 (RMB 10,000) Initial Acquisition Cost (tax-inclusive landed price) ~43.0 ~43.0 ~43.0 Annual Operating Cost (fuel, maintenance, labor, etc.) ~8.0/year × 5 years = 40.0 ~8.0/year × 8 years = 64.0 ~8.0/year × 10 years = 80.0 Major Repair Costs (engine, hydraulic system, etc.) ~2.0 (minor repair in Year 4) ~5.0 (major repair in Years 6–7) ~8.0 (second major repair in Years 9–10) Residual Value Recovery (after depreciation) -~15.0 -~8.0 -~3.