When do you change the cambelt on a 54 plate vauxhall astra 1.7 cdti?

The cambelt on a 54 plate Vauxhall Astra 1.7 CDTI should typically be changed every 60,000 to 100,000 miles or every 5 to 6 years, whichever comes first. It's crucial to consult the owner's manual or a reliable service guide for specific recommendations, as maintenance schedules can vary. Regular inspections are also advisable to check for any signs of wear or damage.