The front end is filled with sensors and cameras. The rear end is filled with sensors an cameras and fragile motors. Some of it is mandated by regulation, the rest is endless featurization. All of it is so close to one-year-only components it doesn't matter, so every impact is a $10,000 repair that can only be done at a dealership, because the technicians qualified and equipped to deal with this stuff are rare, employed almost exclusively by dealerships, and priced accordingly, and the components have to come from Japan or Europe or wherever and there are no qualified aftermarket parts for most of it.
Even with the right parts, the best technician and the correct diagnostic equipment, the repairs frequently don't take, so a cycle of rework begins, usually ending in a sale on the used market. The insurance company gets billed for some of it and the dealer has to eat some of it, and all these costs get amortized into the rates and prices of everything car.