A Study on Breakdown Problems of High-Speed Diesel (HSD) Euro 6-Vehicles (Tata motors, Toyota, Hyundai, Mahindra, Eicher, Kia and Ashok Leyland) in BHUTAN

Program Analysts, Organization: Department of Trade, Ministry of Industry, Commerce and Employment,  Royal Government of Bhutan Thimphu,  Bhutan

Email Id: tshering@moice.gov.bt

This study investigates the breakdown issues associated with High-Speed Diesel (HSD) Euro 6-compliant vehicles in Bhutan, focusing on leading automobile brands including Tata Motors, Toyota, Hyundai, Mahindra, Eicher, Kia, and Ashok Leyland. The research aims to identify the root causes of frequent mechanical failures and operational inefficiencies in these advanced diesel vehicles operating under Bhutan’s unique topographical, climatic, and fuel-quality conditions. Using a mixed-method approach—comprising vehicle diagnostics data, maintenance records, and expert interviews—the study uncovers key challenges such as poor fuel compatibility, inadequate servicing infrastructure, and engine management system faults. Additionally, variations in performance across brands and models are analyzed to provide comparative insights. The findings highlight the need for localized technical adaptations, improved after-sales support, and policy interventions to enhance the reliability and sustainability of Euro 6 vehicles in Bhutan’s transport sector.