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While driving on a rough road, a bushing fell off from the front driver side suspension arm. I could not feel anything different on the 1km drive home. So I'm wondering what is the use for the part?

Random speculation from me, would be that it is protecting the suspension arm and the tire from damaging each other going over heavy (speed) bumps - possibly while turning. Would this be correct?

Mazda 6, 2009 2.0, Stc, Diesel, 140HP

The part and where it came from The passenger side where the part is intact

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user1622951
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While it does look like a bump stop, I can’t see anything that it can bump against.

According to this page, part number 34-970A is a ‘dynamic damper’. Presumably it is some kind of harmonic damper to remove resonant vibrations from the suspension components.

Is it a lump of metal mounted on rubber?

HandyHowie
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It is possibly a rubber bump stop. It purpose it to stop suspension movement before things get to a point of metal to metal contact or the shock bottoms out. If the piece just rusted off you wouldn't realize it until the suspension bottomed out. It is possible that the rough riding you did compressed the suspension to the point the bump stop hit and was knocked off. If that is the case then you may have worn shocks or springs that allowed the suspension to bottom out earlier than it should have.

mikes
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