In accordance with Peugeot's specifications, the timing belt of your 2004 Peugeot 307 1.6 HDi should be changed after 76,000 miles (or approximately 123,000 km) or five years, whichever comes first. This replacement interval pertains to standard operating circumstances. However, if your vehicle is routinely pushed to its limits via frequent long-distance travel, hauling weighty weights, or navigating mountainous terrain, it would be wise to consider exchanging the cam belt somewhat sooner for safety reasons.
