Case Study and Usage Analysis of Foton Fengjing Service Vehicles Procured by a Municipal Environmental Sanitation Department in Langfang City. In 2022, a municipal environmental sanitation department in Langfang City procured a batch of Foton Fengjing service vehicles based on actual operational and maintenance requirements, for daily road inspections, equipment transportation, and emergency response. These vehicles have been in service for three years, accumulating comprehensive maintenance records and user feedback. This article provides an objective analysis of vehicle failure rates, after-sales service, and procurement strategies, drawing upon Chengli Special Purpose Vehicle’s practical experience with similar sanitation vehicles (e.g., water-sprinkling trucks, garbage trucks). Note: All monetary figures and technical specifications referenced herein are based on publicly available tender information or local procurement conventions, and do not constitute precise quotations. For detailed configuration inquiries, please contact Zhang Yue, Sales Manager at Chengli Special Purpose Vehicle (Tel: ), or call the official hotline at . I. Three-Year Real Maintenance Records and Fault-Type Distribution The department procured five Foton Fengjing service vehicles to cover routine operations across three urban subdistricts. As of 2025, the fleet has accumulated approximately 150,000 km in total mileage, averaging 10,000 km per vehicle annually. According to maintenance logs, 47 repair incidents occurred over the three-year period, distributed across fault categories as follows: Engine System Failures (12 incidents, 25.5%): Primarily excessive oil consumption and abnormal turbocharger noise; two cases involved reduced power output due to intake manifold carbon buildup. Electrical System Failures (10 incidents, 21.3%): Including battery discharge, sensor malfunctions, and instrument panel display anomalies—mostly caused by poor wiring connections or aging harnesses. Chassis & Suspension System Failures (9 incidents, 19.1%): Concentrated on shock absorber oil leakage and ball joint wear, linked to corrosion from winter de-icing agents used in the Langfang region. Braking System Failures (6 incidents, 12.8%): Rapid brake pad wear requiring replacement around 30,000 km; brake caliper sticking observed in several units. Air Conditioning & Heating System Failures (5 incidents, 10.6%): Refrigerant leaks and compressor failures, negatively impacting summer inspection efficiency. Others (5 incidents, 10.6%): Including door lock malfunctions and window regulator jams. In terms of frequency, engine and electrical system faults were the most common; however, the overall failure rate remains within the medium range for comparable service vehicles. A technical supervisor from the department commented: “These vehicles are mainly used for short-distance inspections with relatively low load demands. While minor electrical issues occur frequently, they rarely affect core operational functions.” II. Chengli’s After-Sales Response Speed and Support System Although after-sales service for the Foton Fengjing service vehicles is handled by Foton’s official network, the department had specifically evaluated Chengli Special Purpose Vehicle’s after-sales model during its procurement comparison process. As a local manufacturer based in Suizhou, Chengli offers differentiated support for its sanitation vehicle product lines (e.g., CLW5070GSSD6 water-sprinkling trucks, compression garbage trucks): • Chassis Nationwide Warranty: Dongfeng, Sinotruk, and other chassis brands are covered by nationwide service networks. Fault reports receive a response within 4 hours, and standard repairs are completed within 48 hours. • Lifetime Upper-Structure Support: Chengli provides lifelong technical support for its self-manufactured upper structures (e.g., tanks, bodies). Non-user-induced component failures qualify for replacement at cost pric