I already fixed manually the few that had the wrong chassis for their year, except pre-1991 where there are many [AS], is it sure it is just [S]?
If so I'll mass-update that, at the same time I fill those without code

The EU Chrysler are difference code yes, they have to be manual check in case being a USDM.

Graz built models carry different codes. This also happens with Graz built Grand Cherokee and PT Cruisers.

Wasn't there also some difference of code between USDM/export models? Or maybe that was just for Chrysler then?

Some Mopar minivan chassis code was left out and some need correction.

Dodge Caravan & Grand Caravan:
[S] for 1984-1990
[AS] for 1991–1995
[NS] for 1996-2000
[RS] for 2001-2007
https://www.imcdb.org/vehicles_make-Dodge_model-Caravan.html
https://www.imcdb.org/vehicles_make-Dodge_model-Grand+Caravan.html

Should only these "Auris Tourning Sports Hybrid" be changed to "Auris Hybrid Touring Sports"?
Because GB vs rest of Europe? (and rest of Europe keeps Hybrid at the end?)

For wagon version of Toyota Auris.
Origin: Europe
Built in UK.
Delete "Made for EU".
https://www.imcdb.org/vehicles_make-Toyota_model-Auris+Touring+Sports.html
https://www.imcdb.org/vehicles_make-Toyota_model-Auris+Touring+Sports+Hybrid.html

For there:
https://www.imcdb.org/vehicle_1455508-Toyota-Auris-Touring-Sports-Hybrid-ZWE186-2013.html
https://www.imcdb.org/vehicle_1658886-Toyota-Auris-Touring-Sports-Hybrid-ZWE186-2014.html
https://www.imcdb.org/vehicle_1663478-Toyota-Auris-Touring-Sports-Hybrid-E180-2014.html
https://www.imcdb.org/vehicle_1747725-Toyota-Auris-Touring-Sports-Hybrid-ZWE186-2015.html
https://www.imcdb.org/vehicle_870901-Toyota-Auris-Touring-Sports-Hybrid-ZWE186-2015.html
https://www.imcdb.org/vehicle_1891821-Toyota-Auris-Touring-Sports-Hybrid-E180-2016.html
https://www.imcdb.org/vehicle_1211208-Toyota-Auris-Touring-Sports-Hybrid-ZWE186-2016.html
https://www.imcdb.org/vehicle_1681268-Toyota-Auris-Touring-Sports-Hybrid-ZWE186-2016.html
https://www.imcdb.org/vehicle_1956534-Toyota-Auris-Touring-Sports-Hybrid-ZWE186-2018.html

Model is "Auris Hybrid Touring Sports".
Origin: Europe
Built in UK.
Made for GB
https://www.imcdb.org/vehicles_make-Toyota_model-Auris+Hybrid+Touring+Sports.html

Yes.

For there it's Mk1.
https://www.imcdb.org/vehicle_605951-Vauxhall-Frontera-UT4-1998.html
https://www.imcdb.org/vehicle_957689-Vauxhall-Frontera-UT4-1998.html

Vauxhall you mean
Done

For all "1992-1997 Opel Frontera" and "1992-1998 Opel Frontera Sport", it's Mk1.
https://www.imcdb.org/vehicles_make-Vauxhall_model-Frontera.html
https://www.imcdb.org/vehicles_make-Vauxhall_model-Frontera+Sport.html

For all "1998-2001 Opel Frontera" and "1999-2003 Opel Frontera Sport", it's Mk2.
https://www.imcdb.org/vehicles_make-Vauxhall_model-Frontera.html
https://www.imcdb.org/vehicles_make-Vauxhall_model-Frontera+Sport.html