The question marks are: what is that (on the lower mount)?

[Motoman]

There seemed to be a loose part on my lower mount. It seems like a damper or tensioner of some kind. The accompanying image has it highlighted for you. Please excuse the low resolution. I checked a Mazda parts catalog, and that specific component wasn't listed as being included with the mount. After looking at a few different parts, I figured I may as well just ask.

[Craigbelont]

Not that I can tell much from the photo, but I don't see anything that seems loose. Tell me about the automobile you drive. The year, make, model, and powertrain choices would be very useful.

[Motoman]

Auto is standard on this 2003 Protege5. This next picture is somewhat improved. I need clarification on the red section. Lower Mount Blue is the Blue. The red central bar is nearly entirely pullable out, and it wobbles a great deal. A broken rubber bushing is used at one end. If these photos aren't good enough, I'll take more.

[Motoman]

All right, I discovered a different resource that explains it well. The Automatics use this device, which acts as a roll damper. I wasn't sure since the schematics I looked at didn't seem to match the part's actual form.

[clk320x4]

I've been hunting for this in every possible place. Why is this component here? It's broken and mine.

[Motoman]

This device acts as a roll or torque damper. It lessens tremors in the engine and transmission. Specifically, it's a

Engine Mount Dynamic Damper.
B28V39990 Item Number
B28V-39-990 is a superseding session.

[alpaco45]

Mine is in utter disrepair now. Not able to discover any more references to it online. The component number you provided saved my bacon.

[Motoman]

Happy you stumbled onto this!