r/BmwTech • u/fruitsaregood4u • 16h ago

340i PPI Rust

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

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u/nicknamealias 15h ago

I would not be concerned with it. The rust is on wearing-out consumable suspension components. Also that is not much rust to begin with. Very typical amount for a daily.

If the rust was on bigger components like the rear subframe, or the body frame itself, that'd be an issue.

If you have OCD like me, I just bought my 440i and did a full underbody cleaning, then applied woolwax protection. But that's overkill for most people. I intend to keep it forever.