First time post, been using the search for years. The front brake vacuum canister has become really loud lately, like a loud pump sound, go figure, but considerably louder than before. It's a 2013 with 75k, never heard this before, I do have an abs sensor that was torn loose in the back, but that was a month ago. I also hit a tree pretty good and smashed the bumper in, it seemed to barely miss it, that was prob 6 months ago. Took it in to have a trailer brake controller installed, seems to have started then, but I removed all the wiring he did. I'm going to start with replacing the abs sensor and see if he hit anything drilling through the firewall. If anyone has any ideas let me know.