For SEAT vehicles that are three to 15 years old, it's highly encouraged that you bring them in for standard service and maintenance every 12 months or 10,000 miles. If it's been 24 months or your mileage has reached 20,000, then major servicing is preferable as it often covers and addresses car parts that may need to be replaced after two years. However, once you start suspecting an issue with your SEAT or any type of vehicle, it’s best to have them checked by an experienced car repair specialist or mechanic right away to prevent further damage.