Good morning,
The front sub-frame does have a rusting issue but it all depends on the area where you live. Areas with high salt, snow and salt air have huge issues.
As far as the rear, you have uni-body construction. Some rust is normal considering the age. I would keep an eye on it to be sure no holes from the rust allow outside air into the passenger compartment.
Roy
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Tuesday, February 12th, 2019 AT 3:51 AM