It's hot, and it's starting to sound strange. What happened to the left and right B-pillars?

It is normal. Plastic parts are caused by thermal expansion and contraction. My home is MINUS 20 degrees all day. Every day when driving, the cars are sparse. It's usually loud now, so I just want to think about what doesn't ring at ordinary times. But if I stay in the hot storage for one night, it won't ring. Don't worry about normal thermal expansion and cold contraction. If high-end cars use soft materials and damping materials, the abnormal sound will be much better. After all, where is the price? Brother, if this answer satisfies you, please adopt my answer and don't let my heart and blood be in vain!