Most common 2017 Mazda CX-9 problems
Share of the 61 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mazda CX-9 complaints by model year
Best CX-9 years: 2015, 2022, 2020. Years to avoid: 2012, 2011, 2018, 2008, 2010. Compare all years →
What 2017 Mazda CX-9 owners say
Engine & cooling all 43 →
The first sign of an issue was an oil pressure indicator on the dashboard, but upon inspection, the oil levels seemed completely normal. The dashboard light went away shortly after that. A day later, I was on my lunch break and parked my car in a garage for 45 minutes. On the drive there, I did not notice any issues and was able to operate the vehicle fine for the short distance that I drove. When I returned to my parked car, there was a large puddle of oil underneath. I immediately had a mechanic take a look at the car. The mechanic was able to identify a cracked cylinder head, which led to water and coolant entering the engine. He highly suspects that this caused a blown head gasket in the car as well. As well as that, the car's starter, which worked just fine on day 1 of the issue and has never had any problems before, has totally ceased function. …
Driving home the car said 26 miles to E. while in gear going down the road it popped engine system malfunction and the whole car shut off and wouldn't start. Didn't drive the vehicle for 2 days- filled the gas tank and it drove fine for 5 days. Day 6- 4/8/2023, fine driving down the highway 45 minutes. Go down about a mile and it still doesn't seem right, I move lanes and the thermostat light starts flashing at 260, as soon as I make the turn it tells me to pull over and turn the car off-it was at 270. Go to drive across the street to get coolant later- car stalls when I shift into drive. Park it- get coolant takes an entire jug. Idling a little rough, but not bad. Mechanic he can't see any issues, computer is throwing out fuel system codes but no, issues that can be found. Does a tune up on it, pick it up. Smoking when I start the car and something smells burning. …
Fuel & propulsion system
Driving home the car said 26 miles to E. while in gear going down the road it popped engine system malfunction and the whole car shut off and wouldn't start. Didn't drive the vehicle for 2 days- filled the gas tank and it drove fine for 5 days. Day 6- 4/8/2023, fine driving down the highway 45 minutes. Go down about a mile and it still doesn't seem right, I move lanes and the thermostat light starts flashing at 260, as soon as I make the turn it tells me to pull over and turn the car off-it was at 270. Go to drive across the street to get coolant later- car stalls when I shift into drive. Park it- get coolant takes an entire jug. Idling a little rough, but not bad. Mechanic he can't see any issues, computer is throwing out fuel system codes but no, issues that can be found. Does a tune up on it, pick it up. Smoking when I start the car and something smells burning. …
My Mazda 2017 CX 9 apparently had a coolant leak. When we had our oil changed, we were told it looked like it was leaking from behind the turbo booster. As I was driving it yesterday, the car slowed to an almost complete stop on the interstate and a warning sign on the screen showed that it was overheating to a dangerous level. I immediately pulled over and allowed the car to cool down. I checked the coolant level and it was not very low at all, although I did add some coolant at that time. It continued to overheat and even blew tons of smoke out through the exhaust, so I had AAA tow to my home. After researching this, I have found that there was a bulletin posted in 2021 from Mazda about this very thing happening. My husband thinks that we may have a cracked block or a blown head gasket due to this overheating. …
Suspension
I purchased this vehicle with 19K miles on July 31, 2020. I noticed on April 12, 2022, that there was a knocking noise coming from the left front suspension after leaving a Mazda dealership for an oil change. I called Mazda service and was told they only did an oil change. I have put 4 brand new tires and have replaced the front/back brakes, rotors and still hear noise going over uneven pavement. I brought it to my own mechanic twice and he hears the noise but informed me that he cannot order any suspension parts at all for Mazda CX9. He said Mazda are forcing Mazda customers to go to a Mazda dealership. He called 5 different places to purchase strut. suspension and was told they had none. He also said Mazda has a special wrench to work with having to do with suspension and he cannot get one. My mechanic had my vehicle for 3 days and said it's definitely a suspension issue. …
I bought a used 2017 Mazda CX-9 from west shore Honda in tampa in July of 2020. They screwed me financially and I'll handle that separately. There has been an ongoing issue since the first few days after buying the car. I've complained multiple times via email and phone. I've been trying the service department countless times. They keep stating it's a tire issue. To the point they have replaced the tires 3 times. After the second time I had already decided it's not tires. The car has a very rough ride when I'm motion. Once you got 80 it wobbles. After several weeks the wobble can be felt at lower speeds of 55/60. The check engine light comes on but I'm told there's no codes when they diagnostic the reading. …
2017 Mazda CX-9 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 2.5L 4-cyl turbo | 6-speed automatic | FWD | 22 / 28 / 24 |
| 2.5L 4-cyl turbo | 6-speed automatic | 4WD | 20 / 26 / 23 |
EPA ratings. Class: Small SUV.
Frequently asked questions
Is the 2017 Mazda CX-9 a good car?
Based on 61 owner complaints filed with NHTSA, the 2017 CX-9 rates average: 23% fewer complaints than a typical year of the CX-9 at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2017 Mazda CX-9?
The engine & cooling — 43 complaints, 70% of all complaints for this model year. Next are the fuel & propulsion system (6) and suspension (4).
How many recalls does the 2017 Mazda CX-9 have?
NHTSA lists no recalls for the 2017 Mazda CX-9. You can still confirm with your VIN using our VIN recall check.
What are the best and worst years of the Mazda CX-9?
The best years by complaints, compared at the same age, are 2015, 2022 and 2020. Years to avoid or approach with caution: 2012, 2011, 2018, 2008 and 2010. See the full Mazda CX-9 years comparison.
At what mileage do 2017 Mazda CX-9 problems happen?
The median mileage reported in complaints is about 34,000 miles; 80% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.