CarComplaints.com Notes: The only area of real concern for 2013 Mazda CX-9 owners is the brake booster.

In 2014, Mazda extended the warranty on the 2007-2013 CX-9 brake booster to 7 years / 90,000 miles. However this extended warranty has expired for most affected CX-9 owners, so buyer beware.

This Mazda CX-9 brake booster failure isn't terrible in terms of repair cost — it "only" costs $550 average to fix. However it is a safety issue when the brake booster fails as it increases stopping distance. Owners have reported having to stomp on the brake pedal, & crashes/injuries have been reported due to this CX-9 brake booster defect.

10.0

really awful
Crashes / Fires:
0 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
45,200 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.

2013 Mazda CX-9 drivetrain problems

drivetrain problem

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2013 Mazda CX-9 Owner Comments

problem #5

Sep 092021

CX-9

  • miles

A D V E R T I S E M E N T S

Trans seems to slip going in and out of 4th gear. Just bought this car 3 days ago and it has been a consistent problem that didn't start until an hour after the purchase once it warmed up. Looks like it's the transfer case, this suv only has 106k on it ! This is absolutely ridiculous, Mazda needs to offer a recall for this issue so those who have the issue don't have to fork out MORE money for an issue that Mazda is well aware of with their vehicles

- Coatesville, PA, USA

problem #4

Jul 032020

CX-9

  • 102,000 miles
I bought my Cx-9 new in 2013, car now has 102,000 miles. Car started to shutter when getting off the exit from a major highway. The problem was discovered with the power transfer unit. Picture indicates heavy spline wear and corrosion. Transmission spline also has corrosion and wear. This was a very dangerous situation. There's no maintenance required by Mazda for the ptu or the transmission. Mazda should issue a recall on both the ptu and the transmission. This is a known issue with Mazda and discussed on many internet forums.

- Beaver, PA, USA

problem #3

Feb 252020

CX-9

  • 60,000 miles
I was driving down the interstate and my Mazda CX9 caught fire! I didn't realize it since it was under the car and the car beside informed me of it. This was due to the transfer case issues that Mazda had to extend the warranty on them because of so many issues with them. They are covered for 90 thousand miles or 7 years. My transfer case was already replaced once and do to issues and now since my car is past the 7 years but only has 60 thousand miles they will not pay for it. Even though the transfer case they replaced a few years ago should still be under warranty. This situation could of been a lot worse and thank goodness my children were not in the car with me.

- Newcomerstown, OH, USA

problem #2

Jun 252017

CX-9

  • 53,000 miles
My vehicle seemed as if the transmission was slipping between gears on the highway it would take forever to switch into higher gears for higher speeds then when slowing down it would jerk and then finally stop or if I was in traffic where I didn't need to make a complete stop it would jerk to slow down and skip gears and jerk to speed back up while on the high way traveling at normal speed with cruise control set it went from 6th gear to 4th gear for no reason at all! then it started making noises sounding like both the front and back end first you would only hear them when turning right or left then started hearing them in reverse then you heard them while driving all the time on the highway back roads and parking sounded as if my tires were going to fall off! I contacted carmax because that's where I purchased the car in March of 2017 it's now agust 2017 and told them what was happening they lied from the initial phone call but that's besides the point they had my vehicle for a week saying they were looking at it thoroughly to make sure what they found in the rear differential was the issue they assured me it was told me if I heard the noise bring it back asap as I was driving the vehicle home it was still experiencing the same issues we tried to call them immediately but they were closed we called them that Monday and couldn't get anybody on the phone so we left a message we continue to call them for two weeks before they finally gave us an appointment to bring the car and I could not drive my car for the two weeks that I had it in my possession because I was told through my extended warrantee that driving my vehicle while it was still damaged would void my warranty the day after we drop my car off back at carmax I was called and told that the date it was pulled out of the garage on the original repair date 3 weeks prior that the tech noted to bring to Mazda

- Ansonia, CT, USA

problem #1

Nov 152013

CX-9 6-cyl

  • 11,000 miles
Purchased this car new, went to have oil change and there was oil underneath. The right pion seal was out. Had car towed and I contacted the dealership I found out the transfer case is out. Prior to this I smelled something like burning oil, but when I contacted the dealership I was told it was probably the undercoating that is used to ship these cars over the ocean.

- Leadville, CO, USA

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