The evap is ~$700.... I'd ask precisely what parts they are replacing, and how many hours...

Otoh, I do like the 2 year BMW warranty that will come with this repair. One issue will be to make sure the system is flushed and is whistle-clean so that you don't get failure of other components. I'd replace the receiver/drier at the same time

In the past I've commented on the extended warranty with, "it doesn't need to be an engine or transmission failure. Just an AC compressor can cost you $2500"



A