The timing chain tensioners & bearings that keep the chain tight wear out way before their life should be up. I took the car to the Mazda dealership to have it looked at & the shop technicians said they get this problem with these cars all the time. All they had to do was listen when the car was started & they knew exactly what the problem was. Even before going in I called & spoke to a service tech. As soon as I said "my car sounds like a diesel vehicle he said over the phone that the problem was with the timing chain tensioners and such. He also said many of the same cars come in with the same problem & he couldn't understand why there wasn't a recall on this. That is why I am writing to you. The sound occurs when the engine is running regardless of if we're in motion or not. If you put Mazda Cx-7 sounds like a diesel in a browser search you will get many results regarding the timing chain issue.

- Woodstock, GA, USA

Faulty fuel rail causing the vehicle to not accellerate

- Newport News, VA, USA

Air bag light comes on and off randomly with or without passenger in seat. Have had so many issues with this 2007 Cx-7 from 2 different complete A/C system rebuilds in first 2 years, belt tensioner pulley, egr valve codes (had to get egr valve cleaned), coolant temp codes (replaced thermostat & temp sensor) and now air bag random light. I am on a Mazda forum and honestly there should be more recalls on this vehicle due to the volume of complaints in several categories... Mazda responses to just about everything is to replace something for a minimum $500 up to thousands... I am tired of having to deal with Mazda and will never buy another... traded in a 2001 Chevy Tahoe for Cx-7 with 250,000 mi and only had normal maintenance. The Cx-7 was a bad investment for me...

- Salisbury, NC, USA

My 2007 Cx-7 started making a loud banging noise when I started it (May 7,2012). I brought it to the dealership to have it checked out and they said it was my timing chain & actuator (vvt) and it would take $1350 to repair. I paid the money and it was fixed in a couple of days. On June 7th,2012 I started to realize that my ac was not working, but had decided to wait a little bit to have it fixed because I was still hurting financially from the last fix a month ago. Than on June 9th, 2012, I went to start my vehicle and it sounded like it was about to explode. I live in the country and the closest dealership is at least 50 miles away. So I brought it to my local repair shop and they told me my turbo is blown. The Mazda dealership wants $80 to diagnose it and $5000 to fix it (that doesn't include my towing fees and the cost of fixing the ac). I've read all of the complaints online and everyone is saying sludge build up and Mazda wants the receipts for all of their oil changes. I have all my receipts for the synthetic oil changes that I have had done to the vehicle on time (not to mention only filling the car with premium gas). Unfortunately, my car is up to 100,000 miles and they only extended the warranty to what...70K" so basically I have a car that I paid $16K for and is completely useless to me only after 100K miles. From what I've researched vvt's are not supposed to go out until what 250K-300K miles" and it seems a bit ridiculous for the turbo to go out after 100K miles....

- Watertown, TN, USA