2007 Mazda CX-7: sudden loss of power

Filed Feb 19, 2019 · Engine · 115,466 miles · VA

The motor started running hot and losing power and I shut it off. The vehicle was towed to a garage and was scanned on computer and only showed code for steering wheel angle. The mechanic pulled the coils and plugs and checked for spark and installed new plugs and all coils operated normally. Compression was checked and was low in all cylinders around 70-80 psi. Plugs and coils were reinstalled and intercooler put back on. Car is in a no start condition, car was taken to closest mazda dealer and they said they would not fix problem since someone had been in the motor. The mechanic called their service department and told them exactly what had been done and they said they would not make it right. The car has 115000 miles and has numerous recalls for the vvt timing chain, turbo, engine, and they have tsb's for these issues and still play dumb. I want my motor fixed by mazda at mazda's expense since there are so many complaints and issues with these vehicles and mazda knows about it and still doesn't want to make things right.

Filed May 12, 2017 · Engine · 156,000 miles · WA

When starting the vehicle there is a loud sound coming from the engine for 2-3 seconds . It doesn't happen all the time, but it sounds like a card going through bicycle spokes and is accompanied by a high rev sound . This sound also happens when driving directly after the vehicle automatically shifts into a new gear, and is accompanied by a loss of power until the rev sound and card in spokes sound. Mazda corporation has been notified of all reports I have made, and I didn't know of this site to report until recently. I have reported addition defect s to mazda corp as well but do not have the details at this time. That is the reason for submitting them all at this time.

Filed Jan 8, 2016 · Engine, Transmission · 77,000 miles · CO

While driving on colorado state highway 91 at approx 55 MPH, the vehicle suddenly died. The engine ceased working, all systems ceased immediately. I was unable even to safely pull the car onto the shoulder, the loss of power was so complete and so sudden. The vehicle was 200 miles from my home, and 250 miles from the closest dealer at that point, so I had it towed to the closest garage that would look at it, about 60 miles away. That garage evaluated the car and stated that the timing chain had broken and a new engine would be required, at approximately $6,000 to $8,000. I phoned the closest mazda dealer, in denver, and asked what they recommended. They also stated the engine would have to be replaced, at a cost of $8,000 to $9,000. I contacted the garage closest to my home and asked their advice. They stated they had experience replacing the timing chains and repairing engine damage in other vehicles and that they could diagnose whether that was an option. Their guess on cost was between $2,000 and $4,000 if the repair were possible and there was not too much damage to valves. Since the shop that is 25 miles from my home recommended repair at less than 1/2 the cost of the dealer 200 miles from my home, I elected to take it there. Upon research I found 1. The VIN # is one in a series with known timing chain failure, and that a heavier duty one had been issued to replace; 2. The dealer had replaced the vvt previously and should have replaced the timing chain at that time according to service bulletin 01-012/12, but did not replace the timing chain; 3. The failure happened 4 days after the expiration of the engine warranty and 7,000 miles over the 7yr/70,000 mi period; 4. Mazda would not honor the warranty since the repairs were done by an independent shop, not a dealer. Mazda knows that this VIN# is in a range of vehicles with this issue but will not fix.

Filed Dec 7, 2015 · 138,000 miles · CO

While traveling through the state of new mexico, the vehicle A/C compressor locked up causing the serpentine belt to melt and break. This resulted in a loss of power steering and made controlling the vehicle difficult, if not dangerous. Based on other complaints this is a very common problem on 2007-08 mazda cx-7 vehicles and so absolutely be a recall.

Filed Jul 2, 2014 · Engine · 70,000 miles · AL

Mazda extended the warranty on AC compressors, well, my original compressor failed and was replaced under that original warranty. Exactly 30,000 miles later the replacement compressor failed almost 3 years to the date of the original failure. Mazda is refusing any responsibility for this since now my car is out of warranty. Eventhough the replaced part itself is only 30,000 old. This vehicle is also experiencing timing belt issues and extremely loud engine noise. This particular model year just seems to be a lemon all around. Even the replacement parts are failing. And the company is not holding themselves responsible at all. I've research this particular year and found more than adequate evidence that these vehicles are lemons. The same issues are being reported across the world! And mazda is doing nothing. The hazards they are causing are tremendous! Some failures have resulted in fires, quick loss of engine power at high speeds and thousands of dollars in repairs. My car was paid off less than a week before this second compressor malfunctioned. How many cars have had 2 AC compressors in a matter of 6-7 years?? And how many engines can completely fail in the matter of 7 years? Everyday when I start my car it sounds like a diesel engine; popping and clanking noises project for the hood like it's a semi. That's just bad craftsmanship and bad business. Mazda should be held accountable. The recalls should be extended to 100,000 and 10 years at least. These vehicles should be built to last. And a multi billion dollar company should be made to fix their mistakes before someone gets hurt or worse, killed because of their neglect.

Filed Jun 19, 2014 · Engine · 72,000 miles · NC

Driving to work on interstate truck lost power and had to roll to side of the road until it finally stopped rolling. Had truck towed to local mazda dealer, service manager stated the timing chain broke and would need to be replaced. Advised manager to fix the timing chain at a cost 1700.00, notified two days later timing chain was fixed however when the timing chain broke a piece went into the engine and "broke' it. I was advised could have repaired for 8,000.00. Could not afford it, had truck towed home and it has remained parked for 4 years, and yes I still owed on it. Have researched online and see the thousands and thousands of complaints about the truck same year make and model and same issue. Please look into this matter. Please please please..mazda cx7 are unsafe, I could have been killed if the truck cut off in front of 18 wheeler. This is my second complaint submission about this issue to your branch, and reading online I am not the only on that has submitted this claim to you. Please please please please get this truck off the road!!!!!

Filed May 21, 2014 · Engine · 76,000 miles · IL

Driving on my way to tennessee, the car had a major power loss and screeching noise from inside the engine bay. The car was taken to the closest mazda dealership and was told that the turbo had to be replaced due to engine sludge. The car had regular oil changes using the proper amount and oil weight. Mazda had a recall involving the turbo and they did not honor it because I was about 1000 miles over the extended warranty.

Filed Dec 23, 2013 · Engine · 78,000 miles · VA

December 2012 (at about 64,000 miles) dealer replaced timing chain under extended warranty but didn't do anything to correct intermittent power loss and engine hesitation that I had complained to them at the time. November 2013 (at about 78,000 miles), the car experienced severe loss of power, stalling and heavy white smoke from the tailpipe. Dealer claimed "oil sludge" caused engine and turbo failure and refused to bear any responsibility or cost to fix. Mazda USA also refused, claiming the problems were due to insufficient oil change by the customer. Since we change oil regularly, we don't buy mazda's claims, especially when they just opened up the engine less than a year ago to change the timing chain, and at that time didn't claim there was any "sludge" inside. Seeing many similar customer complaints on the internet, it seems mazda has been trying to hide a serioius design and/or manufacturing flaw by blaming the customers as the cause of it. ?

Filed May 29, 2013 · Engine · 65,000 miles · TX

While driving on the highway I heard a ticking noise after a few seconds later the car lost power and smoke came out of the exhaust. When I pulled over I took the cover off from the engine and noticed that there was oil coming out from where the top of the oil goes.the oil pressure on the block was compromised due to failure of the turbo. When taken to the roger beasley mazda dealership and the car was cranked the dip stick shot out from the engine. The dealership indicated that there was carbon build up but could not explain why. The car was towed to another acs certified mechanic and confirmed that the engine failure was due to the failure of the turbo. Before taking the trip on 4-18-2013 I took my car the mazda of mesquite dealership because I heard a ticking noise and the technician indicated that the noise was normal. Also the technician performed msp 36 reflashed PCM with updated software and cleared all fault codes since there was a recall. Three weeks later the engine goes out. The manufacture warranty expired, but have a in service warranty. The in service warranty agency denied the claim indicating that it was not normal wear and tear of the engine failure. I contacted the dealership and also emailed the manufacture to express my concern and both agencies directed me back to the in service warranty. Both the dealership and in service warranty are not willing to assist in the cost being that the cx7 model is a lemon in my opinion. There have been many claims against this model by other consumers in which was confirmed by the employees at the georgetown roger beasley mazda dealership. The employees indicated that the cx7 model has a lot of problems that is why the cx5 replaced the cx7 model. Since the claim was denied I have spent over 1000 which does not include any repairs, on a side note I was 300 miles away from home.

Filed May 28, 2013 · Engine · 76,000 miles · CA

My check engine light came on as I was driving at 40 miles per hour. I did not notice a difference in the way the car was handling, however I took my car into my local mazda dealer to have it checked. They informed me the cars timing belt needed to be replaced and there was sludge on the engine. Ironically I had just had my oil changed and my engine cleaned of sludge less than 2 weeks prior. We submitted the claim through my extended warranty and after a week got it approved. The morning I was slated to pick up the car I was told by the dealer that there was still an issue that they needed the car later. A few days later they told me I needed my engine replaced. The extended warranty denied the original claim now and the claim for a new engine due to poor upkeep, though I have my records of maintenance. I have only had the car for 1 and 1/2 years. This is ridiculous. I am now in the process of taking the car to another mechanic, bear in mind I have been without transportation for about a month and am pregnant. After researching this issue I have discovered tons of issues with the 2007 cx7 which can result in severe safety issues, engines losing power etc. Mazda is not owning up to any of it. No engine should die at 76,000 miles. This is deserving of a recall, mazda needs to own their mistakes.

Filed Dec 26, 2012 · Engine · 98,700 miles · IN

We were driving home on christmas eve going about 65 MPH when the cars engine just died. We lost all power to the car including the power steering. Thankfully we were on a straight stretch and due to time of night there were not many other cars on the road. We were able to coast to the side of the road safely. The car was towed to a dealership where it was discovered the timing chain broke and damaged the engine in the process. After researching this online I discovered hundreds if not thousands of complaints about a broken timing chain that required replacement of the engine. Some of these complaints were as early as 30,000 miles. There was even discussion about a recall on the timing chain from mazda saying that it was defective but mazda was not always honoring this recall. Obviously based on these complaints there is a problem with the timing chain in the 2007 cx-7 that needs to be addressed. Mazda is not doing anything about it and trying to get out of the mess they created.

Filed Aug 31, 2012 · Engine · 55,000 miles · PA

My husband was driving home when he suddenly heard a loud whining noise then lost power. On the way to the dealer, he noticed it was smoking.