Which is more harmful to the car in summer: exposure to sunlight or using a car cover?

[OmarMarie]

Using a car cover in summer is more harmful to the car. Using a car cover in summer: The temperature inside a car cover is higher because the cover traps all the air circulation inside, creating a greenhouse effect that leads to very high temperatures both inside the cover and inside the car. Not using a car cover in summer: Without a car cover, the air inside the car can escape through the car doors, the rear of the car, and small vents in front of the engine. Similarly, wind from outside can enter the car, resulting in relatively lower temperatures compared to using a car cover.

[KiraMarie]

From a practical car usage perspective, prolonged exposure to the sun in summer is definitely more damaging to the vehicle. Direct UV rays on the car paint can cause yellowing and fading over time, while the plastic and leather interiors become brittle and prone to cracking. High temperatures may also lead to electronic component failures or abnormal tire pressure expansion. A breathable car cover can help mitigate these damages, but caution is needed when using one in summer. If the cover is of poor quality or lacks breathability, accumulated rainwater or moisture inside the car can cause mold growth on the interior, rust on the body, or even scratch the paint. Comparatively, sun exposure causes more extensive and lasting damage, as sunlight and heat are constant. I recommend parking in shaded areas or garages whenever possible. If using a cover, opt for a professional, breathable type—don’t compromise the car’s condition just to save effort.

[LouisLee]

I often discuss this in summer, to be honest, the troubles caused by prolonged exposure to sunlight are more significant. Extended exposure can lead to paint discoloration and cracking, a sharp rise in cabin temperature, scorching hot seats and steering wheel, and even overheating and malfunctioning of electronic devices. Car covers can provide sun protection, but in humid environments or with non-breathable covers, trapped moisture can lead to mold growth and corrosion of parts. Based on my experience, the overall damage from sun exposure is more severe than that from using car covers, as it accelerates overall aging. Nowadays, I prioritize parking indoors or in shaded areas, using breathable car covers only when necessary, and regularly cleaning them to prevent dust accumulation. These simple measures can save a lot on repair costs.

[VanAaron]

I think exposure to intense sunlight in summer is more damaging to cars. It directly harms the paint and interior, while high temperatures also affect the battery and tires. Using a car cover properly can protect the surface, but poor ventilation may trap moisture and cause rust. Parking in shaded areas is a safer option.