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08 G37S, Prev MO owner
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50 Posts
Discussion Starter #1
Has anyone had their tensioner pulley bracket replaced? I have 46k miles on my MO & started noticing a vibration under load at low RPMs. This happened around thanksgiving & thought nothing of it. A few days ago noticed the MO surging violently under heavy throttle. Seems that the tensioner bracket also serves as a motor mount, & the excessive vibration caused the Mass Airflow Sensor to fail.

Is this normal to have the bracket fail at only 47k?
 

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Yes, this happened on my Mo at about 30k miles.
I knew it was a pulley/belt noise, the usual squeaking sound. At first, they said it was the pulley - then it was the bracket that was broken. I did not know it was a motor mount. Anyway, they replaced it and no problems since.
 
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