Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety. Notes: The 2007 Mazda CX-7 has numerous reports filed with the NHTSA about engine & A/C problems.

Owners report problems with the 2007 CX-7's Variable Valve Timing (VVT) & timing chain failing, causing major damage to the engine — Mazda uses an interference design so typically the valves are bent & the entire engine needs to be replaced. Mazda dealers typically quote $9,000 for an engine replacement.

There is also a trend of the turbo failing at low mileage.

Finally for the 2007 CX-7 there is a clear pattern of A/C compressor failure at relatively low mileage. Owners report smoke & occasionally the serpentine belt catches fire when the A/C compressor clutch seizes while driving. Mazda extended the A/C warranty to 60,000 miles, however many owners report their A/C compressor failed very soon after the 60k mark.

In 2011, Mazda began a "Special Service Program" that extended the warranty to 7 years/70,000 miles covering turbocharger oil leaks & excessive timing chain noise — an early sign of timing chain failure. However coverage under the program requires perfect documentation of all required maintenance with other stipulations. Buyer beware.


really awful
Crashes / Fires:
0 / 7
Injuries / Deaths:
1 / 0
Average Mileage:
62,708 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2007 Mazda CX-7 engine problems

engine problem

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2007 Mazda CX-7 Owner Comments (Page 3 of 6)

« Read the previous 20 complaints

problem #71

Dec 132011

CX-7 4-cyl

  • 81,887 miles


Just purchased the vehicle for my mom as a present because she has wanted one since they came out. It has 81,000 miles on it. The vvt has gone out, the timing chain needs replaced and now they are telling me that the engine is shot because of the sludge and the neglected care to the vehicle. I purchased the vehicle used so I do not know how it was cared for previously, but since we have had it, it has been cared for magnificently. I have read numerous consumer reports which stated the exact same problems im having. I'm getting quoted over $7,500 to fix the vehicle that I purchased not even 2 months ago. Mazda should be held responsible for this.

- Houston, TX, USA

problem #70

Dec 062011

CX-7 4-cyl

  • 84,898 miles
My car (which I bought in Aug. Of 2010) started making a loud tapping noise and 2 days later it just quit on me, I was pulling out of the parking lot were I work so thank god I wasn't on a major street or anything because it just turned off out of the blue. I had to get help to push it in a parking space and it's been sitting there for the last week because I have no money to go find out what is wrong with it. The warranty has expired now so I'm not sure of what to do since this seems to be an ongoing thing with these cars, not just mine.

- Concord, NC, USA

problem #69

May 062008

CX-7 4-cyl

  • 34,951 miles
Timing valve replaced at 34,951 miles, then engine replaced at 41,060 miles on July 24, 2008.

- Ypsilanti, MI, USA

problem #68

Jul 012011


  • 76,000 miles


Bought my 2007 Mazda CX7 with 76000 miles not even kidding but 12hrs later my motor mount and the vvt went out. A month later radiator cracked and now it had a bad oil leak and loud knockin noise it sounds like an old truck very bumped out I have only had it for five months.

- Avondale, AZ, USA

problem #67

Nov 242011

CX-7 4-cyl

  • miles
Bought car 4 months ago, 61K miles, at 64K miles car turned off on highway, had the car towed to dealership where purchased and the timing chain broke, and now car needs a new engine at 64K miles and Mazda will not cover due to out of warranty.

- Aurora, CO, USA

problem #66

Nov 152011

CX-7 4-cyl

  • 63,000 miles
Driving vehicle when it makes a loud squealing sound and shortly thereafter begins to smoke. Air conditioning had quit working the day before. Have been told by a mechanic that the A/C compressor "took a crap" and the clutch locked up, furthermore this caused all of the fluids to leak out of the bearings. Basically, a worst case scenario. I bought this car in may of 2010 at 24,000 miles and after seeing these complaints, I wonder if the dealership I bought the car from knew about these problems when I made the purchase. The mechanic is working hard to find the best priced compressor kit for replacement and offered to run my VIN thru a local Mazda dealership to see if there was a recall I wasn't told about. Either way, I am out alot of money up front; thank goodness there are still good independent mechanics out there.

- Washington, KS, USA

problem #65

Nov 122011

CX-7 4-cyl

  • 47,500 miles


The power train (timing chain) failed in less than 4 years, 47,000 miles --one owner with regular maintenance done.

- Granby, CO, USA

problem #64

Nov 112011


  • 66,300 miles
The ac compressor on the vehicle seized causing smoke and sparks to come off of the belt. The ac compressor and the belt both need to be replaced.

- Thomaston, CT, USA

problem #63

Nov 082011


  • 68,000 miles
Smoke and rattling and low oil prompted me to make an apt at my local Mazda dealer only to find that my turbo has blown and my vvt valve and timing chain. (the truck is a 2007) I was told that I should not drive the truck as it would be a safety issue with 2 kids. So after my quote of $7000 to fix the truck I thought I would do some research online only to find that there are as many as 50 people with the same problem in the same truck with the same year~!! why wont Mazda stand behind there product and put out a safety recall on this issue? I was told to find this site and lodge my complaint. Hope this will do some good !!

- Richmond Hill, WA, USA

problem #62

Nov 062011

CX-7 4-cyl

  • 53,000 miles
I started to accelerate after coming off of an exit ramp when I heard a noise from the engine then I started to lose power. Immediately after that when I depressed the gas pedal to accelerate, a grinding noise occurred. I was able to get the vehicle to a parking lot. I had the car towed to Mazda dealership who informed me that the turbo had failed. They want all maintenance records for the time I have owned the car in order to make a determination of whether it will be covered under warranty. I purchased an extended powertrain warranty which covers the engine and turbo to 100,000. But it appears they are stating it is due to improper maintenance as I cannot produce all my oil change receipts.

- Staatsburg, NY, USA

problem #61

Sep 192011


  • 82,000 miles


Timing chain broke.

- The Woodlands, TX, USA

problem #60

Oct 222011

CX-7 4-cyl

  • 62,000 miles
Purchased my vehicle 15 months ago at 38,000 miles. In October, I was driving along and the car stopped running. No warning, nothing on the dash lighting up, the vehicle just started loosing speed. The steering was going as well. I put the vehicle in neutral to try and get the steering back and it was a hard steer to the side of the road. I tried starting the vehicle and it would turn but not start. Two tows later, I find, to my surprise at 62,000, that I need a new engine. My timing chain either broke or has derailed. This all happened on October 22nd. It is now November 10th and I still do not have an exact diagnosis nor a vehicle. Yes, warranty is done at 60,000 miles, but what vehicles loose and engine at 62,000 in this decade? and, thankfully, I was not on a highway when this happened as I'm not sure what happened to the steering in this whole process.

- West Dover, VT, USA

problem #59

Oct 142011


  • 100,000 miles
The contact owns a 2007 Mazda Cx-7. the contact stated that there was an abnormal knocking could be heard hear from the engine when first starting the vehicle. Later, the vehicle stalled while driving and was taken to a local mechanic. The mechanic advised that the time belt was fractured and the engine needed to be replaced. The contact did not call the manufacturer. The failure mileage was 100,000.

- Virginia Beach, VA, USA

problem #58

Oct 022011

CX-7 4-cyl

  • 88,000 miles
The air conditioning compressor on the vehicle seized with no warning & caused the serpentine belt to catch on fire. This appears to be a known issue with this vehicle, based on many postings on the internet. Additionally, the service manager at the dealer I take my vehicle to for service said a noise getting progressively louder in the engine is the timing chain adjuster that will require replacement very soon. He said this is a known issue with this particular vehicle, and the many postings on the internet about the same issue seem to confirm his statement. Combined, repairs for both will be in the $3500 to $5000 range.

- Highlands Ranch, CO, USA

problem #57

Sep 222011

CX-7 4-cyl

  • 70,000 miles
There are two complaints for this vehicle. 1. timing belt...failure after 68,000 miles changed after a dispute with dealership, we still had to pay for 2 hrs of labor. 2. turbo unit...failure after 70,000 miles still at option but to pay $3083 to get fixed. Turbo failure happened on highway, vehicle performed erratic and limped to off ramp using shoulder.

- Mount Laurel, NJ, USA

problem #56

Aug 262011

CX-7 4-cyl

  • 63,000 miles
Car suddenly stalled 3 hours away from home; no noticeable performance issues / noise prior. Towed to mechanic who determined timing belt broke causing some valves to bend and other damage therefore replacement of engine required. Was on, other car blog sites along with researching this site and found that many, many others who have encountered the same issue around the 60K miles mark (or less in some cases). Spoke to Mazda and they are not taking any ownership or responsibility even though many incidences of the same mechanical problem. Oil changes were made regularly and car was last into Mazda for a noise less than a year ago which they said was due to my brakes. Have owned many cars before (not Mazda) and this car is a huge disappointment as is my experience with Mazda. I hope this issue will be or is being pursued with Mazda. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6)

- Warwick, NY, USA

problem #55

Sep 092011


  • 92,700 miles
I have had my 2007 Mazda Cx-7 for less than one year. I stopped at a red light after exiting the highway and my car engulfed in thick white smoke. I had the car towed to a local shop per my insurance company to have it checked out. The repair shop at first called to tell me it was the starter, and that it would cost 600 to fix it. Come to find out that not only the starter blew, but it also ruined the alternator as well as the fuses on the battery. I was told by Mazda that this is not a common occurrence. The total of the repairs is now over 1200. The vehicle has been meticulously maintained throughout its lifespan and is at 92,000 miles.

- Clinton, MA, USA

problem #54

Jul 012011

CX-7 4-cyl

  • 31,000 miles
After driving down the expressway the air conditioner stopped working. I brought it to the mechanic and was told the air compressor kit went out and it is $2,300 to fix.

- Bingham Farms, MI, USA

problem #53

Aug 272011

CX-7 4-cyl

  • Automatic transmission
  • 69,420 miles
The contact owns a 2007 Mazda Cx-7. the contact stated that the engine was started and a rattling noise was heard from the engine. The vehicle was taken to the dealer where the dealer confirmed that the variable valve timing actuator failed and would need replacing. The manufacturer was not contacted and the vehicle was not repaired. The failure and current mileage was 69,000. The timing chain and belt was replaced. Updated 11/10/2011

- Pine Mountain, GA, USA

problem #52

Jun 102010


  • 34,000 miles
2007 Mazda CX7 - turbo broke while driving causing tremendous squealing sound and loss of power. Able to drive home and had towed to Mazda dealership. Service mgr called me saying they checked car over and could not find anything wrong with it and asked if I wanted an oil change. I said go ahead with an oil change but there is definitely something wrong with car and to check again. Mgr called back later saying a screw in the turbo had come loose, turbo was broken, I needed a whole new engine and it would cost $9,000. Car had 34,000 miles and still under warranty. I fax'd copies of oil change receipts. Mazda North America denied warranty claim saying my oil receipts were unverifiable. Mna told me they would not verify my receipts. They claimed there was "sludge" and that caused it to break and I hadn't taken care of it. It was a leased vehicle with only 3 months left to pay. Had just started a new job after being unemployed and had to rent a car costing $650 and then go buy a Kia causing extreme financial & emotional duress. I told the serv mgr that I could have been killed and found out these cars were engineered incorrectly causing them to get too hot causing "sludge", that I knew he knew about the issue because a service bulletin had been released Jan 08 stating the exact problem, and mazada was trying to avoid a recall. He stated that it was "Mazda North America", and not him and if it were up to him he would fix the car under warranty. I told him I was under extreme duress and that Mazda should do the right thing and fix the car. They refused so had to leave the car at the dealership.and walk away. Now Mazda says I owe them $5,000. Filed complaints with BBB and attorney general. It is an outrage that so many Mazda CX7 owners have had same nightmare and Mazda does not care about the safety of it's customers. Please help us.

- Jupiter, FL, USA

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