Engine Exhaust System problems of the 2008 Mazda CX-7

I write to express my disappointment at the quality of vehicles Mazda is putting out, and the lack of response Mazda's customer service department offers its customers. In 2008 I bought a 2008 Mazda cx7 and this car has given me nothing but problems. From the faulty wiring that always blows out the headlights, to the power windows which sometimes turn off and turn on, to the exhaust fumes that can be smelt inside the car, I’ve complained about all of it and spent countless resources and time trying to fix it all. The last straw came about a month ago when I was informed that my vvt adjuster and chain were out, the turbo was out and the engine was failing and it would cost me close to $4,000 to repair it. We’re talking about a car with only 75,000 miles. According to my mechanic and according to edmunds. Com reviews these are all common Cx-7 problems and Mazda just won't own up to them.

The contact owns a 2008 Mazda Cx-7. While driving approximately 40 mph, the contact heard a loud grinding noise outside of the vehicle and blue smoke emitted from the exhaust pipe. The vehicle was taken to an authorized dealer who stated the failure was contributed to engine sludge. The technician advised that the engine be replaced. The vehicle had not been repaired. The manufacturer was not notified of the problem. The approximate failure mileage was 50,835. The VIN was unavailable.

This Mazda Cx-7 is at a Mazda dealer's service center right now getting the timing chain replaced, vvt issue corrected, a new turbo system to keep it from dumping tons of blue smoke from the exhaust, a/c system fixed, and there is an intermittent electrical issue as well. Not happy obviously, as these are all know issues with the vehicle. Mazda has agreed to pay for the timing chain, but the rest comes out of my pocket.

I have a 2008 Cx-7 with a failed egr valve. They refuse to cover this part under my power-train warranty even though this is clearly an emissions failure. I have been doing some research on the environmental protection agency's website and it is my understanding that the vehicle manufacturers are required to design and build their vehicles to meet emission standards for the useful life of the vehicle specified by law. Under section 207 of the clean air act, if epa determines that a substantial number of vehicles in a class or category do not meet emission standards in actual use even though they are properly maintained and used, epa can require the manufacturer to recall and fix the affected vehicles. My car has less then 30,000 mile on it and the erg valve should not have gone out already. I should not have to pay $712 to replace a part that does not meet emission standards set forth by California. It is not just my vehicle having this problem, the more research I do the more I realize that this an on going problem with multiple Mazda consumers.

We purchased the vehicle new from a Mazda dealer. From the time we purchased the vehicle I have noticed excessive carbon buildup around the exhaust openings at the rear of the vehicle. It is progressively getting worse to the point where the catalytic converters are getting red hot. The chrome exhaust tips are now discolored due to the heat. This vehicle was checked several days after purchase, where according to the Mazda dealer, there were no issues. We moved, and a new Mazda dealer is servicing the vehicle. Today, 03-18-09 it was again checked diagnosticians with no issues. When this vehicle is driven for approximately 100 miles or more the exhaust system gets extremely hot. It is this "layman's opinion" that this engine is running very rich, "starving for air". I am concerned that this will eventually catch fire from the excessive heat generated at the catalytic converters and transmitted through the remainder of the exhaust system. (last trip back from phila area was 03-11-09. . . I was concerned about parking it in the garage until it cooled down).