Help identify air system part

[Lead_sled]

Much respect and many thanks to all of you. I've got lots to learn still, but not afraid to get down and dirty to do most of my own work. Hopefully this will fix the issue.

Over the next few days, I’ll do the EGR tune up. Just got my sensors in.

My other issues involve a pin hole leak in one of my airbags. It’s not affecting anything at the moment. But I can hear the air and located where it’s coming from.

My leveling valve is leaking air also. I’ve been looking for info to see if it can be rebuilt or if it needs to be changed. It’s a Haldex 90555059.

Again, thanks!!!