One problem related to loud engine noise has been reported for the 2010 Mazda CX-7. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Mazda CX-7 based on all problems reported for the 2010 CX-7.
Was driving and all of a sudden lost power and a howling noise no check engine light came on. Pulled over to see what it was and nothing visible no leaks nothing. Had my wife hit the has and no noise. Stared driving and noise came back and white smoke. Just had an oil change done and next oil change due in about 1000 miles. Drove about 20 mph to get home check oil and it was ok. The white smoke makes me think the turbo went on my car. I just purchased this car in October of 2015. It's been back to the shop for electric problems with the key and radio that still not resolved. Radio shuts off and beeps that key is not in car.