When I took my van in for the isolator post inspection the dealer notified me that if they found a problem with the isolator post that they’d have to keep the van until the part came in. I quickly reminded them that the car belongs to me and I would make the decision and they backed down.Haha yes. We got it inspected at the beginning and they said they would get the parts in within a few days. Unfortunately that turned into weeks. We were fortunate they gave us a loaner so we weren’t too worried but i think I’ll do the same as you this time and take it in only when they have the parts.