Update: I bought the 2013 x5 for ($2290USD) $3150 CDN plus tax. So I am thinking I’ll try to find an N55 engine replacement. I already sourced 2 N55 engines locally…one for $4800 removed from 2013 435xi and another engine still in a 2011 X3 for $2000. I went online to research X5 N55 engine removal videos and found that owners or shops are sometimes just replacing rod bearings and sometimes crankshaft on N55 that are seized or knocking. I think I’ll just go with engine replacement if I can find a good engine and do it myself at home in my double garage.