I recently had to top off my coolant with w.e the BMW coolant was. But JCL you mentioned bleeding the coolant system. i am the 2nd owner of the X and i am not sure thats been done at all. When should i do this again? i got it at 50k and i am at 70k right now. Getting ready to change the pulleys and belt since there squeaking once in a while. i got 3 bottles of the premixed BMW coolant in my basement lol.

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2005 Black x5 3.0i