What UAE Heat Does to a Used Car

A car that has spent five summers in the UAE is not the same as a five-year-old car in a temperate climate, whatever the mileage says. Heat ages specific components much faster than use does, and those are the ones to check.

Air conditioning

The most expensive common failure. Compressors here work harder and for more months of the year than almost anywhere. Check the vent temperature with the engine idling and the system on maximum. Below 10 degrees Celsius is healthy. Above 15 means something is wrong, and a compressor replacement runs from AED 2,500 to well over AED 6,000 on European cars.

Battery

Gulf heat shortens battery life to around two years, sometimes less. Check the date sticker. A battery older than two years is a near-term cost, though a small one at AED 300 to 600.

Rubber and plastic

• Tyres crack from the sidewall in, regardless of tread depth. Check the four digit date code, and replace anything over five years old.
• Suspension bushes perish, giving knocks over speed bumps.
• Wiper blades last months, not years.
• Door and window seals shrink and let in dust and noise.
• Hoses go hard and split, which is how most overheating starts.

Paint and interior

Clear coat fails on horizontal surfaces first. Look at the roof and the top of the bonnet for a milky, peeling finish. On the inside, check the dashboard top for cracks and the leather on the driver's seat bolster, both of which take the worst of the sun.

Cooling system

Radiators here work at their limit in summer. Look for a crusty residue around the radiator seams and the cap, check the coolant level and colour, and watch the temperature gauge on the road test with the air conditioning running. A car that creeps above normal in traffic with the AC on has a cooling problem, and on a modern aluminium engine overheating is not a cheap mistake.

What to budget

The road test that actually finds heat faults

Most test drives are too short and too gentle to reveal the things that matter here. Ask for this instead:

1. Start the engine from genuinely cold. Listen for rattle in the first few seconds, which points to timing chain or hydraulic lifter wear.
2. Air conditioning on maximum, recirculate on, for the whole drive.
3. Fifteen minutes minimum, including at least five minutes stationary with the engine running and the AC on.
4. Watch the temperature gauge in that stationary period. It should stay put.
5. Some stop-start traffic, which is where cooling and automatic gearbox faults show.
6. A stretch at road speed, then a hard braking stop from about 80km/h to feel for warped discs.
7. After the drive, open the bonnet and look for steam, smell for burning coolant or oil, and check for fresh drips underneath.

Sand and dust

Heat gets the attention, but dust does quiet damage. Air filters clog faster, cabin filters block and strain the AC blower, and fine sand works into window runners and door seals. Pull the air filter and look at it. A filter packed grey is a sign the car has not been serviced to the schedule the climate demands, whatever the stamps say.

Cars that handle it well, and badly

Without naming models, the pattern is consistent. Vehicles developed with Gulf and Australian markets in mind tend to cope. Vehicles developed primarily for Europe, with tightly packaged engine bays and small cooling packs, tend to struggle in their later years here. That is not a reason to avoid them, but it is a reason to check the cooling system and the AC with more care on a European car than on a Japanese one.