Is that build location so important for cases like this one?
In the movie titles of those without assembly country I still see European titles, so having all these as Korean-built by default would be wrong too.
I think it is better not to have build info for 70% than having wrong info for 20% of them.

Indeed making a comment on each to change one by one would be time-consuming.
If you want to make a list of the vehicle IDs to be changed to one or the other, I can easily do the update based on that, and then change the rest to the other value.

Hyundai i30 - should be listed as built in Korea by default. We have a huge number of i30s appearing in Korean movies where this should be the case, but going through them all and changing them one by one would be very time consuming. So I suggest listing them all as made in Korea unless stated otherwise.

Updated, thanks

For all "2000-2005 Chevrolet Impala" and "Chevrolet Impala Limited":
https://www.imcdb.org/vehicles.php?resultsStyle=asImages&yearFrom=2000&yearTo=20- 05&makeMatch=2&make=chevrolet&modelMatch=1&model=impala&modelInclModel=on&modelInclChassis=- on&mk=&origin=&madein=&madefor=&role=

Chassis-Code is "GMX210" and built in Canada.

And for there, chassis-Code is "GMX210", year is "2000" and built in Canada:
https://www.imcdb.org/vehicle_1281560-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1558577-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1469109-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1727979-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1759364-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1767620-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1782003-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1599090-Chevrolet-Impala-GMX210.html
https://www.imcdb.org/vehicle_1705378-Chevrolet-Impala-GMX210.html
https://www.imcdb.org/vehicle_1723408-Chevrolet-Impala-GMX210.html

for there, chassis-Code is "GMX210", extra info is "9C1", year is "2000" and built in Canada:
https://www.imcdb.org/vehicle_1535299-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1757396-Chevrolet-Impala-GMX210.html

Indeed it seems that they were already renamed one by one by someone else

But since the SJ413 badge is also visible, shouldn't we rename them as SJ413 Caribian instead ?

(and SJ413 Sporty Caribian fot those with that longer roof/shorter hardtop)


Edit : Done.

Suzuki "Caribbean" on this site is mis-spelled. It's actually "Caribian". This is confirmed by Wikipedia and other sources. For example, this pic, where the lettering on the rear window clearly reads Caribian: https://i.pinimg.com/originals/f8/b2/98/f8b298b4fc37c371cbee96cc736efee6.jpg


All these need to be changed:

http://www.imcdb.org/vehicles.php?resultsStyle=asImages&yearFrom=&yearTo=&makeMatch=- 2&make=Suzuki&modelMatch=1&model=Caribbean&modelInclModel=on&modelInclChassis=on- &mk=&origin=&madein=&madefor=&role=

For all "2006-2013 Chevrolet Impala" and "Chevrolet Impala Limited":
https://www.imcdb.org/vehicles.php?resultsStyle=asImages&yearFrom=2006&yearTo=20- 13&makeMatch=2&make=chevrolet&modelMatch=1&model=impala&modelInclModel=on&modelInclChassis=- on&mk=&origin=&madein=&madefor=&role=
https://www.imcdb.org/vehicles_make-Chevrolet_model-Impala+Limited.html

Chassis-Code is "GMX211" and built in Canada.

And for there, chassis-Code is "GMX211", year is "2006" and built in Canada:
https://www.imcdb.org/vehicle_1456323-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1634171-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1579735-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1567750-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1690839-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1767131-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1771723-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1782147-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1811686-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1751230-Chevrolet-Impala-GMX211.html
https://www.imcdb.org/vehicle_1816617-Chevrolet-Impala-GMX211.html

for there, chassis-Code is "GMX211", extra info is "9C1", year is "2006" and built in Canada:
https://www.imcdb.org/vehicle_1065123-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1432967-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1656135-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1815231-Chevrolet-Impala.html
https://www.imcdb.org/vehicle_1796434-Chevrolet-Impala-GMX211.html

for this, chassis-Code is "GMX211", extra info is "9C1" and year is "2013":
https://www.imcdb.org/vehicle_1590421-Chevrolet-Impala.html

for this, chassis-Code is "GMX211", extra info is "9C1", year is "2012" and built in canada:
https://www.imcdb.org/vehicle_1727806-Chevrolet-Impala.html

Thank you!

Done.
I also updated existing ones.
And I also fixed a bug: the models with a space were not correctly handled for the default origin.