What are some of the 2003 hyundai xg350 problems?

The most common problems reported by owners of the 2003 Hyundai XG350 are a rough idle due to a faulty EGR valve and oxygen sensor failure. A faulty EGR valve can cause problems with the flow and operation of the EGR system leading to performance issues including a reduction in power, reduced acceleration, and decreased fuel efficiency. EGR valves can become stuck 'open' or 'closed' due to a build-up of soot particles, carbon deposits, and dirt from fuel. The oxygen sensor in Your vehicle measures oxygen levels in the exhaust gases exiting the engine. The oxygen sensor should be replaced every 60,000 to 90,000 miles. This sensor is a wear item and does fail over time.