March to May: the pre-summer window that exposes cooling systems
Late spring is quietly the smartest time to buy in the UAE. Daytime temperatures are already pushing past 35 degrees, which is enough thermal load to make a marginal cooling system show itself, but workshops are not yet buried in the summer breakdown rush. An inspector working in April can run the engine to full operating temperature, sit it at idle with the AC on maximum, and watch what the coolant temperature and AC vent readings actually do. In January that same test proves very little.
The pre-summer inspection should lean hard on everything that heat will punish three months later. That means a pressure test or at least a visual check of the coolant system for weeping hoses and crusty residue around the radiator end tanks, a look at the condition of the water pump and drive belts, vent-temperature readings with a probe thermometer rather than a hand held over the vent, and a battery test under load. UAE batteries realistically last 24-36 months; one that scrapes through a March test will very likely strand the new owner in August, so a good report notes the battery's age and cold-cranking performance, not just pass or fail.