If you want your car to be dependable for years, you need to have it serviced at regular intervals. There are a few generally accepted times when you should absolutely have it serviced: 15,000 miles, 30,000 miles, 60,000 miles, and 90,000 miles. The exact timing of these services can vary depending on the manufacturer, the model, and the year, so you should always check your user's manual to understand your specific vehicle's needs, but here are a few general guidelines.