Nothing looks broken. On a hot day the tires, the battery, the coolant and the paint are all under attack at once. Nine places the heat does its work.
Park in the sun at 90°F and the cabin gains about 19°F in ten minutes and 43°F in an hour. Dashboards in direct sun routinely pass 160°F.
Pressure rises roughly 1 psi for every 10°F, so a cool-morning reading understates a highway tire. Underinflation, not heat alone, causes most summer blowouts.
A 50/50 coolant mix under a sealed, pressurized cap boils around 265°F. Let the cap lose pressure and the same coolant boils far sooner, on the same hot day.
Under-hood air passes 140°F when the outside air is only 90°F. That heat evaporates battery electrolyte and corrodes the plates. Summer does it; winter reveals it.
Oil thins as it warms, so the film protecting bearings is at its weakest when loads are highest. High heat also oxidizes oil faster than any mileage number suggests.
Refrigerant is not consumed. If the cold has faded, the system has leaked somewhere. A clogged cabin filter is the other suspect, and it starves airflow first.
Gasoline expands as it warms, and topping off past the pump's click pushes liquid fuel into the vapor canister built only for vapor. It is a common check-engine cause.
UV breaks down the clear coat sitting above the color. Once that layer fails the pigment chalks and fades, and the same sunlight cracks dashboard plastics.
Lithium cells age faster when hot, so a sun-soaked EV taken straight to a fast charger gets the worst of both. The car throttles the charge itself to protect the pack.
None of it needs a workshop. Park in shade, check tires when cold, glance at the coolant. Heat is patient — it only wins when nothing gets looked at.