If you decide to keep it, maybe inquire about extended warranty (expensive). Also factor in slightly increased maintenance costs.
The car will probably depreciate a little faster since the F30 is out. It might not be advantageous to sell it privately.
I extended the lease on my A4, did a 3 year and then another 3. After six years, I was pretty tired of the car and was ready for a new model.
Sell your parts and use it towards a new vehicle?
Organized crime is alive and well: It's called auto insurance