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I put new (aftermarket) motor mounts on my niece's 740 (157K) about three years ago @ 130K. It stopped the vibration at idle that was common to the 740s.
However, now it's back after only 30K more miles (and three years) on the car -again, with the brake on at a stop light you get the vibration, shift into neutral and it goes away. No vibration while driving - only idle and in drive. I hate to put another set of motor mounts on this one. And it's more pronounced in cold weather?? Warmer weather quiets the vibration a bit.
That seems like a short lifespan for motor mounts? Anyone else been down this road? I do have the exhaust anti-vibration bracket on it - so I assume that rules out that possibility.
Bob Weber
Hamilton, Ohio
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