When considering used cars, understanding maintenance cost is key, and the 2014 ATS-L 25T has moderate maintenance costs for a luxury sedan. A basic synthetic oil change costs approximately $80-$120, while major services like transmission fluid replacement or timing belt inspection range from $300-$500—figures that align with other comparable used cars in its class. At the 140,000 km mark, critical routine services for this used model include: full engine oil and filter change, replacement of spark plugs and air filters, inspection of cooling system hoses and coolant flush, brake system inspection with pad/rotor replacement if needed, and a comprehensive check of the rear-wheel drive components (differential fluid, axle boots). Using genuine parts is recommended to maintain its reliable performance, an important factor for anyone who buys used cars and wants to keep their vehicle running smoothly long-term.