The manufacturer usually buys chassis in large numbers and has them in there lot until they need one to build a coach. With that in mind, the chassis could be a year different from the manufacturer date. Example: My Thor Siesta 24SS is a 2018 model year but is built on a 2017 Mercedes Benz Chassis. As far as chassis warranty, it does not start when the chassis was built but when the model was sold. I took possession in March 2018 so that is when the Mercedes Benz warranty started.
Paul
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