One problem related to mass air flow sensor has been reported for the 2003 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Chevrolet Impala based on all problems reported for the 2003 Impala.
Several times since I got my car, it has stopped running while I was driving. I had the mass air flow sensor replaced, the fuel pump, the bcm also but it still continues to shut off completely while I'm on the road. My check engine light was not on the last time it did it and I've done several repairs to attempt to fix it. Ive spent nearly 1000 in these repairs and still nothing works. I'm afraid to drive my car but I have to work. I take care of my vehicles and I'm not sure if this is a gm issue or what, but I've read many complaints sounding similar to mine and I want something done. I was on a very busy road on these days and in complete motion (35 mph and above).