Welcome! Take some time to read through what was shared here, and feel free to ask any questions.
Now that we know what the car is, I’d suggest:
You can plug-in the VIN, mileage, and condition. With less than an hour of effort, you should be able to get a half-dozen actual estimates to see what this car is worth.
There already is (and will be) a ding a your credit report, but you’re asking the right question: do I spend the money to recover this, or eject and deal with the replacement 6 months early. To my point above, having an idea what the replacement would be (consider buying, not leasing, something Asian with a warranty until the loan is paid-off), and what the impact will be.
On the impact, this is a very useful thread:
You will want to spend some time reading through, but while you are doing there you should pull your 3 credit bureaus to see what is actually on which, and get your current FICO scores. You are eligible for a free credit report every year, and often your Bank or Credit Card might give you your current FICO (not Credit Karma) score for free - 2 of my credit cards offer it right inside their app. If not, you can pay for a FICO subscription and get it - I’d recommend paying $30 for the Advanced and cancelling after 1 month:
Also check out the tips here:
Did BMW give you any kind of deadline by which to respond to them, before they close the repossession and send your car to auction? How long do you have to make a decision?