Commercial vehicle repair businesses maintain and repair vehicles used for transporting goods or passengers, including vans, lorries, buses, coaches and specialist fleet vehicles. Work may cover routine servicing, oil and filter changes, brake and clutch repairs, steering and suspension faults, electrical systems, engine and gearbox problems, cooling systems and exhausts. Workshops commonly use diagnostic equipment to identify faults in modern vehicles and may carry out repairs on diesel, petrol, hybrid or electric models, depending on their facilities and expertise. Services can also include vehicle inspections, fault finding, breakdown repairs, replacement of tyres and batteries, and repairs to chassis, bodywork or tail lifts. Some businesses focus on particular vehicle types or systems, while others provide maintenance for mixed commercial fleets and arrange scheduled servicing to reduce vehicle downtime.