Looking for recommendations for installation shop for (either Draw Tite or Execuhitch) trailer hitch for 2012 BMW X5 and BMW harness/coding.

Thanks

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Bob Voskian

2012 BMW X5 3.5i
2014 BMW 535i xDrive (wife's)
1991 Porsche 928 GT 5 speed (44K miles)
2003 MB SL 500 (wife's summer car)
2004 Audi TT 3.2 quattro with DSG