Found out my car was in an accident..

[Ken]

2) The entire front side of the car had been repainted, see pictures below for proof.

3) The accident was more severe than I thought because the body panels now have uneven gaps on each side.

4) The driver's door does not close properly upon close inspection.

This is why you always go over a prospective car purchase, new or used, with a fine tooth comb. All of what you mentioned is hard to miss and should of thrown several red flags. If you do not have the knowledge/skill, etc, pay a reputable shop to do a PPI.

CPO'd by BMW

BMW never states that CPO is conditional on no previous accident. Cars can become CPO if they meet the minimum requirements on the inspection. Basically it's a marketing gimmick. How many owners has the car had? It could of gotten wrecked and repaired after gaining the CPO label.

So here's my dilemma, I was under the impression from the dealership that nothing was wrong with the vehicle, and that they had performed a full check up to ensure this.

Can you prove they knew anything about it? They probably got it at auction, washed it, and listed it for sale.

I am wondering what the best course of action would be, and if anyone has ever experienced something like this. I am not comfortable knowing this as it will affect resale in the future, and might cause issues with the car mechanically down the road. I am wondering if it is too much to request a buy back from the dealership, considering it has only been 4months since the purchase.

A lot can happen in 4 months of ownership, I guess it never hurts to ask, but I wouldn't expect them to do anything. First thing I would do would to run a Carfax and an Autocheck to see if anything as appeared during your ownership and go from there, sometimes it takes months for things to show up, if they do at all. I would file this under a lesson learned and move on.

Crappy situation either way.

Yeah - all of this. Shit situation but a lesson learned. I don't believe there is much ground to stand on here unfortunately.

On the positive side, if the CarFax is clear still - i'm sure your resale won't be affected much, if at all. Most buyers, or at least some, will go through the same process as you did. While morally dubious, that might be your best bet if the dealer tells you to get fucked, turn around and sell it and get out with what you can in case any issues crop up.