Aux cable only works when half plugged in car
I have bought my IPhone 11, 2 weeks ago and it was working fine in the aux in my car, one day the aux stopped working and today I discovered only when the aux is half plugged in my car. (so the cord is fully plugged in phone and half plugged in car). The aux was working fine before when I had an IPhone X. I headphones work fine, it’s only aux. Any suggestions why?
iPhone 11