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There is Tech Service Bulletins in North America for this.

TSB: TRANS 037

This bulletin provides information for TCM software upgrade of some 2011MY Sorento (XM)
3.5L vehicles produced from start of production to August 31, 2010, and some 2011/2012MY
Sedona 3.5L vehicles with automatic transaxles which may experience a shock and clunking
noise when the engine starts after long-term parking.
For confirmation that the latest reflash has been done to a vehicle you are working on, verify
CAL ID using the tables in this TSB.
 
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