No minivan is highly reliable. They seem to be too complicated for that. But the Honda Odyssey and Toyota Sienna tend to require fewer repairs than the Chrysler minivans. In defense of your Dodge, it is 18 years old.
One problem with 2008-2011 Chryslers is they require frequent brake pad replacements. To avoid that issue, I'd get the nicer 2011 and up.
Kia and Nissan also offer minivans, but those tend to be less reliable than the Chrysler.
If you really need the space of a minivan, there really isn't an alternative. SUVs and crossovers have less space inside.