Notes: The 2008 Mazda CX-7 has numerous reports filed with the NHTSA about engine & A/C problems, continuing these defect trends from the 2007 model year.

Owners report problems with the 2008 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 2008 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.


hardly worth mentioning
Crashes / Fires:
0 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
60,148 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.

2008 Mazda CX-7 engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2008 Mazda CX-7:

Unsubscribe any time. We don't sell/share your email.

2008 Mazda CX-7 Owner Comments (Page 2 of 2)

« Read the previous 20 complaints

problem #15

Sep 132013


  • 40,856 miles


Timing chain went out. Mazda is trying to say it sludge from poor maintenance. Even though we have all receipts since we owned it for oil changes. We just purchase this CX7 in August of 2012 with almost 28000 miles. Now a year later and 40000 miles it needs a motor.

- St Charles, IA, USA

problem #14

Jun 222013


  • 100,262 miles
The contact owns a 2008 Mazda Cx-7. the contact stated that while driving approximately 65 mph, the vehicle stalled without warning. The vehicle was towed to a dealer where it was diagnosed that the turbo charger and the engine needed to be replaced. The manufacturer was notified of the failure. The vehicle was not repaired. The approximate failure and current mileage was 100,262.

- Revere , MA, USA

problem #13

Jan 052011

CX-7 4-cyl

  • 40,000 miles
There was a knocking almost as if the car was a diesel, brought the car to milford Mazda in milford ct after purchasing the vehicle a month earlier at bobs in milford ct. The Mazda dealer replaced the vvt December 2012 the service engine light goes on and I take it to the local garage and they get a code for camshaft, I bring the car to Mazda who tells me upon arrival with out even looking at the vehicle that I need a new engine and it wouldn't be covered under my extended warranty because they are sure there is sludge in the engine, yea same story everyone else gets. I faithfully had my oil changed every 5,0000 miles max as this was drilled in my head growing up from my dad. Approximately some time in March I was driving to work I get this loud whining sound coming from the engine and the car loses all power the turbo went. I have a new turbo installed and still supposedly need another vvt just 2 years after they replaced this part and now there is a humming/whining noise coming from the rear of the car not to mention (2) tie rods are bad. This car is no doubt a piece of crap that I still owe 13K on and Mazda corporate will not even return my call. There has to be something that can be done with all the same complaints.

- Trumbull, CT, USA

problem #12

Dec 242012

CX-7 4-cyl

  • 86,000 miles


First the turbo went out and now the engine!!!

- Galloway, OH, USA

problem #11

Feb 222013

CX-7 4-cyl

  • 76,100 miles
While traveling at 45mph, experienced sudden loss of power. Cel came on and trouble P3001 was the code display on handheld reader. Car is out of warranty, dealer states several components within engine have failed and Mazda has no responsibility over failures since I do not have an extended warranty. I have researched the problem production years 2007 and 2008 are plagued with premature engine failure.

- Oakland Gardens, NY, USA

problem #10

Jan 302013


  • 54,000 miles
Earlier that day I got my oil changed on my lunch break at work. I drive back to work my car sits in the parking lot and I leave a few hours later well my car it was making a really loud noise it sounded like a helicopter I live about 30 miles away so I figured if I drive slow enough I might be able to make it home. As I was going up a hill the car start to decelerate so im like ok maybe I need to go slower no I get up over the hill and am going down the hill and the car just dies there on the side of the road. I get it towed to Mazda the next day because I find out I have a powertrain warrenty until 60,000 miles I only have 54,000 miles on it so they tow it under my roadside assistance. Now my car has been there for a month and come to find out my timing chain went on it causing a domino effect on it and making the engine go. Now the dealership wants 8 grand to fix my car because Mazda denied my claim due to "engine sludge" which at this low of miles and me performing regular oil changes they considered "lack of maintance" because I couldnt prove it.

- Boonville , NY, USA

problem #9

Feb 172013

CX-7 4-cyl

  • 78,000 miles


I purchased the 2008 Mazda CX7 about 2 weeks ago and already replaced the compressor I first had white smoke coming out the tail pipe well I didn't think anything of it until someone told me that is not normal so a week later I started hearing noises like a diesel truck and a knocking noise so the next day I went to the dealership that sold me the vehicle and we drove the vehicle and he stated it was fine he then drove again and the vehicle locked up and they told me the compressor locked up now I'm hearing a ticking noise from the engine and they stated it was normal but it still concerns me cause reading other statement have me worried that the engine valve will be next and I don't have money to repair a vehicle I'm a single parent of 4 kids.

- Montgomery, AL, USA

problem #8

Oct 162012


  • 60,000 miles
Check engine light came on took it to dealer...egr value needed to be replaced...warranty was expired. About $700 or part...wondering if there is recall on part. Reading forum and seems to be a problem with others.

- Ft Oglethorpe, GA, USA

problem #7

Dec 212012


  • 54,445 miles
The contact owns a 2008 Mazda Cx-7. the contact stated that while driving 25 mph, the vehicle stalled without warning. The contact pulled over and had the vehicle towed to a dealer. The dealer performed a diagnostic test which determined that oil sludge was in the turbo lines. The dealer advised the contact that the turbo malfunctioned and needed be replaced. The dealer did not state how the oil entered the turbo lines. No repairs were performed on the vehicle. The failure mileage was 54,445.

- Mukilteo, WA, USA

problem #6

Jan 022013

CX-7 4-cyl

  • 39,640 miles
The vehicle is a 2008 Mazda Cx-7 bought as a pre-owned certified from Mazda dealer in ramsey, NJ. It had the engine light on and I took it immediately to the dealer near my work (colmar, pa) and it was diagnosed with code P0401, egr valve failure. With under 40K I was not expecting this to fail and the repair cost was $718. (diagnosis, parts and labor). I looked up online and saw that it is a frequent issue with people having much newer car than mine. Obviously it was not covered under warranty and I had to pay from my pocket. But I am disappointed with the repair as the next day the brake light came on. It comes on in the morning and stays on intermittently. It finally goes away after 15-20 minutes of driving. I plan to go to the dealer tomorrow to see if this is something that resulted during yesterday's repair.

- Blue Bell, PA, USA

problem #5

May 012012

CX-7 4-cyl

  • 44,000 miles


Purchased vehicle used at 41,000 in Mar 2012. First issue: Egr valve had to be replaced at 44,000 miles in May 2012, not covered under warranty ("not a California emissions vehicle"). had 45,000 mile service performed. Dealership service tech also provided service history from previous owner and verified it was serviced regularly. Service tech confirmed this was a known issue with the vehicle, but it was not covered under warranty unless it was a ca emission vehicle. Also not covered under aul extended warranty purchased with vehicle. Cost: $750 to replace egr. Second issue: Dec 2012, 52,000 miles, driving for less than a mile in congested traffic at 15-20mph. Vehicle began spewing white smoke out of exhaust. Immediately pulled off road, called for tow truck. Waited 3 hours with two children under 8... vehicle was taken to same dealership for evaluation/repair. I asked them to evaluate turbo, based on white smoke and slow driving/idle, as consistent with other known issues. Was informed engine mount 3 filled with oil, which coated underside of vehicle, causing smoke. Engine mount failure covered under 60,000 mile factory warranty. Service technician indicated they haven't seen this issue before (however, I see it in several posts online). Service technician commented I was lucky that this did not result in a more catastrophic event (fire, total engine failure). He also commented there is "a lot of stress on mount #3" and it was hard to find the replacement part. He acknowledged turbo issues, but claims my turbo is okay (for now). Mazda needs to recall and fix these well known and documented engine issues (egr valve, engine mounts, turbo chargers, compressors) before there is further loss of vehicles/life. At a minimum, extend the warranty to cover beyond 60,000 miles when so many known issues exist. It will be cheaper than the class action lawsuit underway.

- Sherwood, OR, USA

problem #4

Oct 012012


  • 66,600 miles
The contact owns a 2008 Mazda CX7. The contact stated that the check engine warning light illuminated. The vehicle was taken to the dealer and a diagnostic was performed. The failure was located as the emissions gas recirculation valve. The dealer replaced the egr valve and the failure was repaired. The failure and current mileage was 66,600.

- Reynoldsburg, OH, USA

problem #3

Aug 232012


  • 50,835 miles
The contact owns a 2008 Mazda Cx-7. while driving approximately 40 mph, the contact heard a loud grinding noise outside of the vehicle and blue smoke emitted from the exhaust pipe. The vehicle was taken to an authorized dealer who stated the failure was contributed to engine sludge. The technician advised that the engine be replaced. The vehicle had not been repaired. The manufacturer was not notified of the problem. The approximate failure mileage was 50,835. The VIN was unavailable.

- Glenside, PA, USA

problem #2

Jun 042012

CX-7 4-cyl

  • 46,235 miles
I bought the car at 30K miles in November of 2011. I have since driven 15K miles on it. I noticed a click in the engine. I took it to the dealership where they proceeded to tell me that everything was fine and I needed to get a 45K mile maintenance on it. I told them the clicking was bothering me. They said that was fine. I got the car back and the noise appeared to have gone... but reappeared after a few days. I went back to the dealership and told them that a car under 5 years old with less than 50K miles on it shouldn't make that noise. They finally admitted there was a problem with the timing chain, causing a leak in the oil which put sludge in the engine. They told me it was my fault etc. I proceeded to look online and there were thousands of other people with the same problem. From the research I have done, they aren't even making the car anymore and I'm sure it's due to these same engine problems. My dealership told me it was my fault... and the other people on had the exact same problem. I hope someone does something about this! the dealership tried to switch out the car saying that they were trying to help... and after driving it for 10 minutes... I told them the beginning noise was in this car as well. He acted aloof and said he didn't hear it... until we were back at the dealership. Then he said... 'oh... I hear it now' they need to do a full recall of this car. Working so hard to finally be able to get a car makes you so happy... but to get ripped off in the end.... it's awful. I feel completely vulnerable and it's terrible. Thanks for even having this website... hopefully we can get this car off the market!

- Dulles, VA, USA

problem #1

Jul 212012

CX-7 4-cyl

  • 65,900 miles
Ac failed on long trip. Temp gauge did not indicate overheating, no warning lights were lit up. After arriving at destination 5 hours from home, turned off engine and saw smoke coming from rt front hood area near wheel. Tried to start, not turning over. Added coolant to over flow (it was empty). Still not starting. No Mazda dealer open in area (closest one was 45 miles South in ft wayne. Time was approx 2pm on Saturday. Enterprise rent a car also not open except airport locations (they are open 8-12 on sats). Knew there was a w-mart nearby w/ auto service. Our vehicle is parked in large mcdonald's lot near the back out of the way, relatively safe location...clld and spoke w/ [xxx] at wal-mart. He offered to come look at the car after work-w/in 15 min he was there. Because engine not turning over, he at first was concerned engine may have seized up/head gasket blew etc. He isolated the ac clutch as the problem by manually turning over the engine and then taking belt off completely. Started right up... he then proceeded to drive us to airport in ft wayne, had our car towed to his repair shop, accessed the problem area and advised me what part to order.the man is a saint. We spent 4 hours at airport until enterprise took mercy on us and rented us a car even though I only have a debit visa. Part has been ordered from dealer where we purch car.they matched price online of $289.01 and shipping to Indiana is only $12 will arrive by end of day tomorrow. Not sure what labor cost will be. Unable to order only clutch from Mazda. Don't need pump but will have extra in case it fails in the future. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Cynthiana, KY, USA

Not what you are looking for?