I have a 2014 Mazda CX-5, which I have owned for seven months. I purchased from a car trader. Last week, it failed very suddenly with loss of power and black smoke from the exhaust, there were no warning lights or other signs the car was not running as it should. I had to abandon it in the road and later it was recovered. My local garage believe it could be the turbo and potentially the DPF, repair would cost anything from £1700-£5000. I rang Mazda HQ and they advised to take to a Mazda dealer for diagnostics, so arranged recovery to local dealer. They have advised it will need a new turbo, engine and exhaust - costing £12,000 for parts alone. Obviously this outweighs the cars value. Any advice would be greatly received.