I have a 2002 Accent 4 door, automatic with 23000 miles. If I do the required maintainence (not suggested) and keep all the receipts etc. Can Hyundai refuse warranty work if it becomes necessary? I have had no problems at all! Took it from Wisconsin to Florida twice this year. I took it to a dealer for an oil change, twice, the second time they gave me the 12000 mile "check" which was rotating the tires and "checking everything". That cost almost $100.00. Any advice.