2000 BMW X5 Q&A

2000 BMW X5 Question: a/c works left side but not right

a/c blows cold air from left dash vent but blows warmer as it goes to the passenger side. -
Answer 1
A/C gas low -
Comment 1
That worked, thanks... -
Comment 2
How do you replace/fill A/C gas?? Do I have to go to a service station or can I 'try' to do it by myself. I really don't feel like getting screwed over by a $500 bill. Thanks! -