[sam911]

This is the story. I find a 2011 3M for sale and guy is up front and tells me it has a salvage/ rebuilt title from flood which he has bought from insurance auction. it has appr 33k. I go test drive and car drives great . plenty of power no lights on in car by computer. wants 15 k below book at around 24k. everything works . so i do some digging and find out through carfax that car was driven into high water by driver at 31500. car is then towed to an actual BMW service center by tow not running and tech removed air box and drained removed intake manifold and drained. . then removed all 8 spark plugs . performs compression test and found cyl 4 low on compression and states bent rod!! then states vehicle needs complete engine. Cost $1200 by BMW service center just to diagnosis. so now car goes to insurance auction sells to this dealer who is now selling. as i understand fluids changed by auction house? car now has 33k and drives great. My question is would the car either run bad with engine lights on or just completely die?? am i wasting time to just forget or should i take to another BMW facility for compression test ?? if the car had a bent rod would the car still run great??? confused and need help with good advice from a person real knowable with these car.( preferable a BMW tech adviser?