Fuel Injector problems of the 2009 BMW 535

On an early cold morning, I crank my car and after it started I noticed that my check engine light came on; it stalled out and I had to restart it. This car has been in and out of the repair shop (BMW) within the last year approximately four times. The major reason was fuel problems. I had a diagnostic test done on it and the BMW repair shop stated that I needed all injectors, spark plugs and a fuel inlet valve replaced which will cost about 2200. The problem I have is that BMW published this information to correct an ongoing problem with 535i twin turbo fuel system; however at the consumers' expense. I spoke with a supervisor in customer relationship and she stated that BMW was not response for or repairing it.