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Vehicle speed controlPart report

2010 Mazda CX-9 Vehicle speed control Problems

Complaints
9about this part
Share
5%of 195 total for the year
Median mileage
19,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 9 complaints about the vehicle speed control of the 2010 Mazda CX-9, 5% of the 195 complaints for this model year. Where a mileage was given, the median is 19,000 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.

“Took my car to dealer 2-3 times for the brakes, way before my warranty was any where near expiring, because I kept hearing a grinding sound. They kept telling me nothing was wrong, that my brakes had some gravel on them and they just cleaned them. I don't travel on dirt roads or anything, city roads/highways. No out of town travel at all, actual only in town travel, home/work. My 2nd concern is, while driving sometimes my speed seems to shift, as if the gears are shifting. …”

NHTSA complaint #11005438, filed 2017-07, 30,000 miles

“While driving my 2010 Mazda CX-9 approximately 65mph on interstate 270s in maryland, I pressed the gas pedal to accelerate in an attempt to pass several vehicles who were traveling in the right hand lane. Once I felt that I had enough additional speed to successfully pass the vehicles, I released the gas pedal and noted that the car continued to accelerate. I attempted to apply my brakes, but they would not slow the vehicle. …”

NHTSA complaint #10554259, filed 2013-12, 25,068 miles

“Was driving on I-495e in maryland between exits 28 and 29. Changed lanes and put foot down on gas pedal to accelerate. Suddenly felt like gas pedal was stuck and that braking could only slow but not stop acceleration. Moved over a few lanes to right shoulder and after continued failure of brakes to stop acceleration (and considerable engine torque) began to apply emergency brake. Slowed acceleration further but still could not bring car to a full stop. Finally put car into neutral and came to a stop. …”

NHTSA complaint #10427053, filed 2011-09, 19,000 miles

“The first time I experienced this terrifying ordeal was in november of 2011. Since then, I have had it happen two more times. The car accelerates of up to speeds of 90 MPH without warning . All 3 incidents have happened on the highway. The brakes slow it down, but do not stop it. All 3 times, I've been lucky enough to get the car to the shoulder and ride down the median , pushing the emergency break in and at one point pushing it into park. Mazda knows about this. Therefore they are liable. …”

NHTSA complaint #10452780, filed 2012-03

“My car had unexpected accelerations 3 different times. My brakes would not stop my car. I had a tear in my knee on the last incident in march 2012. My medical bills were around $5,000. Mazda kept my car and gave me a rental. But said they could find nothing. I sold the car. I know this dealership had another Mazda do the same thing as my car. They told me Mazda was aware there was a problem. I hope something is done. I wasn't killed because I was able to get to the grassy areas all 3 times. Blowing my horn as a warning to other drivers. I believe my old car was taken to an auction by Mazda. …”

NHTSA complaint #10576384, filed 2014-04

Related service bulletins

Vehicle speed control: other model years

YearComplaintsShare of year
202138%
201912%
201633%
2012115%
201142%
201095%
200912%
200832%

Other parts of the 2010 Mazda CX-9

Brakes
91 complaints
Engine
23 complaints
Transmission and drivetrain
23 complaints
Air bags
18 complaints
Suspension
16 complaints
Other or unknown
7 complaints
Electrical system
6 complaints
Body and structure
6 complaints
Engine cooling
5 complaints
Exterior lighting
4 complaints
Steering
4 complaints
Wheels
4 complaints

← All problems reported for the 2010 Mazda CX-9

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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