A CAR file is nothing but a version of a zip file and any unzipping software to open this file (Example: 7zip).
Once this CAR file is unzipped, it would list the files that hold various information related to the resource/s exported. The metadata.xml file would contain the SQL that is part of the CAR file resource.
(i) Example: view1 is a CAR file, unzipping this CAR file using a software called 7-Zip (free third party software)
(ii) Files inside the view1.car file:
(iii) Open the metadata.xml file in a notepad and search for the below tag: this tag holds the SQL that belongs to the CAR file.
<attribute name="SQL" type="STRING">