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The manufacturer's handbook states that the timing belt and tensioner should be replaced at 100,000 miles but many mechanics say it is safer to change timing belt at 45,000 or 50,000 miles. If timing belt fails it can cause serious engine damage so it's better to be safe than sorry.

An average timing belt with water pump and labor is around $600.00. The Focus has an interference engine which means if the timing belt goes, the engine needs to be replaced.

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11y ago

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