Was wondering if anyone could identify this UFO I found under the Left fender. It has a small hose going to it that seemed like a vacuum hose.

 

It's a vacuum cannister. It "stores" vacuum (technically can't store anything that is not there, but hey). It is needed to perform several functions which use vacuum, such as door locks, when the engine is not running.

 

Also used for cruse control and air solenoid operation. Check your one way valve also it holds it vacuum when the motor is off.

 

Thanks so much. Off to put it on Ebay I guess.

 

this would be one part that you probably wont sell they dont usually fail and the reservoir isnt worth much either