When to change the cambelt on a citroen relay 2.2 hdi?

The cambelt on a Citroën Relay 2.2 HDi should typically be changed every 156,000 miles (approximately 250,000 kilometers) or every 10 years, whichever comes first. However, it's essential to consult the owner's manual or follow manufacturer recommendations, as driving conditions and vehicle usage can affect the lifespan of the cambelt. Regular inspections may also help determine if a change is needed sooner.