I will also say the build date of the 1989 car with 0324 Crimson interior is late April 1989. To me that sounds very late for MY1989? If so, wonder if some additional allowances were made as MY1990 was approaching with possible changes and those were then offered on late-build 1989 cars that might not have been mentioned in 1989 printed materials. It appears from the OP, that Crimson was available in 1990.
Just thinking out loud: by April 1989 the Cardinal material had all been flushed out from inventory and BMW was not gonna order more of it for just a few late builds, so as BMW was procuring Crimson for the pending 1990 cars if you still wanted red in your 1989, you had to settle for MY1990 Crimson or pick a different color. And printed materials published at the start of MY1989 production would never reflect any changes made post-publishing.
I could be talking out of my ass here.
Just thinking out loud: by April 1989 the Cardinal material had all been flushed out from inventory and BMW was not gonna order more of it for just a few late builds, so as BMW was procuring Crimson for the pending 1990 cars if you still wanted red in your 1989, you had to settle for MY1990 Crimson or pick a different color. And printed materials published at the start of MY1989 production would never reflect any changes made post-publishing.
I could be talking out of my ass here.

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