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Engine coolingPart report

2005 Mazda MAZDA6 Engine cooling Problems

Complaints
11about this part
Share
7%of 147 total for the year
Median mileage
40,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 11 complaints about the engine cooling of the 2005 Mazda MAZDA6, 7% of the 147 complaints for this model year. Where a mileage was given, the median is 40,000 miles.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“In august of 2005 I purchased a Mazda 6 (automatic transmission). After 2 - 3 weeks of ownership my Mazda died on me one day while driving on the highway. I immediately took it to the dealership yet no problem was identified. 4 - 5 months later my car stalled while sitting at a light. A couple of months after that, my Mazda stalled again. A couple of days ago while backing out of the driveway my car just turned off. …”

NHTSA complaint #10182224, filed 2007-02, 3,000 miles

“We were driving from los angeles, ca to fremont, ca on the I-5 highway. Weather was hot - about 95f to 100f that day. About mid-way in our drive, the car became very jerky when I lift off, or step back on, the throttle. I pulled off to the closest exit and proceeded to a gas station. As we were rolling to the gas station, I needed to step extremely hard on the brake pedal, but was still not able to completely stop the vehicle. Vehicle kept rolling at ~5 MPH despite I step hard on the brake. …”

NHTSA complaint #10343551, filed 2010-07, 122,500 miles

“Incident 2005 Mazda 6 broke down along side road. Engine only had 40,000 miles on it. Called Mazda service manager, bob, and he told me to have it towed there and he'd take care of me. I was later told the engine blew but as his crew looked at it they verified that the engine and oil was clean. He said he'd call regional and see what he could do for me to get the engine repaired/replaced. Damage resulting after several weeks of run around I was finally told it was going to cost $90 for the service team to have looked at the engine. …”

NHTSA complaint #10430133, filed 2011-10, 40,000 miles

“I think the Mazda line of vehicles should be looked into. I have a 2005 Mazda 6 I sedan that from the very beginning had issues. At 5000 miles I complained to the NHTSA because the car shut off on me on the highway. I took it to the dealership and the dealership could not duplicate the problem. The problem with the car shutting off has happened a few other times over the years and I've always had it investigated however the dealership could never find an issue. Finally it is 2011 and the car has 96000 miles on it and is completely shut down. …”

NHTSA complaint #10429155, filed 2011-10, 96,000 miles

“2005 Mazda 6 6 cylinder with 61000 miles , needs new engine. The only sign was a screech noise a few times , took it to an auto shop, where they checked the belts ,and we could not reproduce the sound. Started a minor oil leak ,and less than 4 days later engine failure, and the dealer says it needs a new engine. Just out of warranty. Mazda dealership says the oil looks black and indirectly told me that I probably did not do regular oil services, which is untrue . I just did not use the dealership. …”

NHTSA complaint #10189322, filed 2007-04, 61,200 miles

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
201211%
201010%
200951%
200822%
200796%
200695%
2005117%
2004117%
20033621%
20021036%

Other parts of the 2005 Mazda MAZDA6

Air bags
76 complaintsTransmission and drivetrain
19 complaintsElectrical system
13 complaintsExterior lighting
7 complaintsVehicle speed control
7 complaintsBrakes
6 complaintsOther or unknown
6 complaintsBody and structure
5 complaintsVisibility (wipers, defrost, mirrors)
5 complaintsEngine
4 complaintsSuspension
4 complaintsTires
4 complaints

← All problems reported for the 2005 Mazda MAZDA6

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology