Front Air Bag Sensor Control problems of the 2008 Mazda CX-7

Took car to Mazda for airbag recall, replaced airbag but Mazda tells me the actual sensor that tells the airbag to deploy does not work and its my responsibility to fix it. Prior to the recall the sensor did not come up on the dash after the recall I now have a light on my dash and Mazda is telling me its 700. 00 to replace fix and part and labor. Electrical car shorts out all the time, windows, engine, lights work one day not the next when doors open. Car stalls out when driving and system reboots. Other issue is I have spent 7 thousand dollars in repairs on this car. I have black smoke coming out of the tail pipes, ive replaced thousands of dollars in parts. Engine light wont go off. I took it finally to auto zone for a free engine diagnosis to get a print out and now the emissions valves are showing faulty. Its burning 2 quarts of oil about every couple of weeks/monthly basis. Ive replaced motor mounts, coolant/oil parts, air compressor, headlights, bumber, wiper blades, electrical control panels, rocker arms, spoilers that have cracked with weather, the car still needs another motor mount, I now have a knock in the engine like its the lifters and I still have another year on this 5 year loan on this car. I have to keep rolling payments to the back of the loan to keep up with the repairs. Its very frustrating. Ive never had this many problems with any car I have purchased ever!!! even the parts department at Mazda has said what do you expect you purchased a plastic car on wheels. Is there any other people experiencing problems besides myself?.

The contact owns a 2008 Mazda cx7. While driving approximately 40 mph the "air bag" warning light indicator illuminated. The contact stated the warning indicator remained illuminated until the engine was turned off. The vehicle was taken to an authorized dealer on four different times for the identical failure. There was a replacement of the two air bag modules, and the front driver side air bag. The contact had concern of the potential safety hazard. The failure mileage was unknown. The VIN was unavailable.