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If you own a Hyundai Sonata made between 1989 and 2006, it comes with a timing belt. In contrast, models from 2007 onwards are fitted with a timing chain. For vehicles with a belt, it is advised to replace it every 90,000 miles, costing between $520 and $670 on average, with labor costs ranging from $220 to $290. On the other hand, cars with a chain usually do not require this maintenance, as the part is meant to last the entire lifespan of the vehicle. However, there can be exceptions to this rule. The average cost to replace a timing chain is around $750 to $900, with labor contributing between $630 and $800. Belts and chains play a critical role in synchronizing the camshaft and crankshaft sprockets, which control the intake and exhaust valves. If either of these parts fails, it can lead to significant engine damage.
The Hyundai Sonata is equipped with a timing chain that doesn't require maintenance, unlike a belt which would need periodic attention.
The 3.3-liter engine in the 2006 Sonata is an interference engine that uses a chain and requires no maintenance.