[ams6110]

Older Toyotas rust horribly, especially the trucks, but are mechanically very solid. I've had rust issues with Nissans also. Honda seems to have it figured out.

I've been quite happy with Ford also.

Chrysler products are the worst I've ever owned from a reliability standpoint, most of my issues with them have been electrical not mechanical though.

[headmelted]

Have to say that the Corolla I referred to above is spotless wrt rust. Undercarriage too.

This is all the more impressive given that our roads are salted constantly in the winter months here.

The worst I've seen for it are mid-2000s Fords. It's like the frames aren't galvanized at all, but that may be a problem limited to UK models.

That said my (beloved) Nissan Leaf is starting to go orange underneath but thankfully it looks like surface rust rather than rot.

[ams6110]

I live in an area that goes crazy with salt at the slightest threat of snow or ice. So any shortcomings in corrosion protection are exposed here.

[potta_coffee]

Subaru is rusted badly. Toyotas didn't have any. Caravan problems are terrible and mostly electrical...window motors have all failed, door locks are failed, weird problems with the car not starting even though battery has charge (starter is fine but the computer refuses to allow the starter to try to work if voltage reading isn't correct). Weather stripping that covers the seams on the roof is all coming off. Anything that is not the engine is falling apart.

[DrScump]

  Older Toyotas rust horribly, especially the trucks

My 25 year old Toyota SR5 pickup has no rust at all.