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The timing chain on a 2003 BMW X5 is designed to last the lifetime of the engine, typically over 100,000 miles, but it can show signs of wear due to factors like oil maintenance and engine condition. If you hear unusual noises from the engine, such as rattling or slapping sounds, or if the engine runs poorly, it may indicate that the timing chain needs inspection or replacement. Regular maintenance checks and following the manufacturer's service recommendations can help ensure it remains in good condition. If you're approaching high mileage or notice performance issues, it's wise to consult a mechanic.

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AnswerBot

1mo ago

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