We've run a 1.4 petrol Kangoo for about 4 years / 60,000 miles. In that time it has needed a pair of drive shafts, a complete exhaust system (including cat and lambda sensor) and an oil pressure switch (damaged when changing exhaust), a fuel filler neck ( that is electrically interlocked with sliding door lock), one lower engine mounting rubber and a couple of accessory drive belts.
One garage sold us a new coil pack to cure an intermittent misfire, but the fault was eventually traced to the cat and lambda sensor.
Never had any cooling problems, even after a serious loss of engine oil through damaged pressure switch.
The accessory drive belt seems to stretch like toffee, but re-tensioning at every service is sufficient.