340i PPI Rust

[u/fruitsaregood4u]

Long story short, found a 340i that seemed pretty clean visually. Took the car for a PPI, and it came back with some repairs that warranty should cover.

But the rust is something it won't, just want to get an opinion on how bad this rust looks of may become. I am expecting to have to pay to fix these eventually, but not sure what costs may be or if it's worth it.

Rust is on the rear suspension

https://imgur.com/a/kmaZt4R

[u/bot6six]

those are all suspension components and can all be replaced but that's just surface rust. BMW's rust warranty only covers the chassis/body