2010 Mazda CX-7: whining or grinding noise

Filed Apr 17, 2016 · Electrical, Engine · 108,000 miles · CT

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.

Filed Sep 8, 2014 · Engine · 52,000 miles · FL

On 8/31/14 I noticed a rattling noise when I accelerated as well as a whining noise. The noise was intermittent and did not occur all the time, but was a distinct noise coming from underneath the vehicle. I had not had any check engine lights illuminated or any other warning lights. I brought my vehicle into my local mazda dealership and they advised it was the turbo and in order access appropriately they would need to tear down the engine. After reading online there are numerous documented issues with turbos, vvt timing chains and engine issues with mazda cx7. The shop called me back 2 days after I dropped it off and said I would need to replace the turbo & I need a new engine. They also stated since there was oil sludge present that I would be responsible for $9000 costs. I provided the dealership my oil change receipts including the last oil change that was done in june. My car was still within 3000 miles and was not due a oil change, however the owners manual stipulates recommended changes every 7000 miles!! The dealership advised that when I brought it in no oil was in the dipstick and because there was sludge mazda is denying my powertrain warranty (which is still active) due to not maintaining the vehicle. This is absurd, I have maintained my vehicle and mazda is using this as an excuse to not be responsible for a obvious defect in their vehicle!!! There are many documented instances about this same scenario happening with others all over the internet, this issue is a result of a defective turbo and not due to lack of maintenance. Mazda extended turbos and vvt timing chain issues to 7 years because of this same scenario for 2007-2010 mazda cx7s but when I asked about ssp 86 im being told my vehicle does not qualify. I would like to know why mazda can get away with not abiding to their warranty and request this be investigated. Thank you

Filed Jul 15, 2014 · Engine · 65,000 miles · OH

While driving on the turnpike my car started to make a whining noise then smoke came from tail pipes. After having it looked at the turbo charger has gone bad!

Filed Feb 14, 2013 · Engine · 50,100 miles · TX

Tl* the contact owns a 2010 mazda cx7. The contact stated that while driving approximately 35 MPH, he heard a loud whining noise and was unable to accelerate the vehicle. The contact also stated that the turbo failed. The vehicle was taken to the dealer where it was diagnosed that the turbo needed to be replaced. The manufacturer was made aware of the failure. The vehicle was not repaired. The approximate failure and current mileage was 50,100.

Filed Feb 29, 2012 · Engine · 18,469 miles · OH

The turbo made a loud whining noise when the accelerator was pushed and you could not accelerate. Alot of white smoke was flowing from the exhaust. We immediately pulled over on our way home from out of town and called aaa to tow the car back to the service dealer in parkersburg wv. The vehicle only has approx. 19,000 miles on it with service records showing proper oil changes. The vehicle is under warranty and mazda sounds like they don't want to cover this problem.