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EnginePart report

2015 Mazda CX-9 Engine Problems

Complaints
17about this part
Share
49%of 35 total for the year
Median mileage
83,874miles
Trend
FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.

NHTSA recorded 17 complaints about the engine of the 2015 Mazda CX-9, 49% of the 35 complaints for this model year. Where a mileage was given, the median is 83,874 miles.

Example complaints

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

“I was driving into the highway and my vehicle just shut off. I was in the car with my children and I was scared that we were going to be rear ended. I had my mechanic look at the car and he advised me that the water pump leaked and the coolant leaked into the oil. I’m having another mechanic provide me with an estimate of how much the repair is going to cost. After the car shut off and I tried to turn it in again the batter, engine and oils light went off and I had the car towed to the local mechanic.”

NHTSA complaint #11425780, filed 2021-07, 67,384 miles

“Engine light came on then my vehicle started over heating and leaking coolant. Vehicle was towed to dealership.after technician diagnosed the problem, I was told it was the internal water pump that caused fluid to mix with the engine oil ruining the engine. I was told I had three options: buy a new engine, buy a used engine or buy a new car. I was told that this was an issue with this year, make and model for several customers. I asked why a recall notice was not given to vehicle owners and was told it was not a safety issue. …”

NHTSA complaint #11404014, filed 2021-03, 107,300 miles

“We purchased a 2015 Mazda cx9 with 30,000 miles three years ago. At the start of the month, the car suddenly overheated while driving and the engine failed! The mechanic said the water pump failed, the coolant mixed with the engine oil and the engine was done. $$7944.41 additionally, the overheated engine caused the transmission fluid to burn to a point the the transmission failed. $$4864. This happened at 65,000 miles, 5,000 miles past warranty. After researching the problem, we learned that this is a common problem on mazdas that use the duratech engine. …”

NHTSA complaint #11366824, filed 2020-10, 65,000 miles

“While driving my 2015 Mazda CX-9 on a very busy interstate, the check engine light appeared on the driver panel. I was traveling with my very young children, ages 4 and 20 months. Approximately 10 miles later, I started hearing a rattling sound under the hood. Shortly thereafter, my car stalled out as I entered my subdivision. My husband had to push the car to our driveway. I called aaa that same day and had the car towed to the dealership that services the vehicle. I was told that the water pump needed to be replaced and was quoted a price to fix the issue. …”

NHTSA complaint #11292498, filed 2020-01, 116,100 miles

“We bought this vehicle in june of 2015 and about 2 or 3 moths after I noticed that the rear driver side rotor had a deep scratch on it. They fixed it by sanding the rotor insted of replacing the rotor. Next time I brought was an oil leak on the front side of the motor about 4000miles. They said that the oil filter is loosed. So me and my wife went home having some pieceof mind that I brought the car to a dealership and they will do the right thing. But at 7000 miles I brought our vehicle for first oil change and told them theres a screeching sound on one of the pulleys in the motor. …”

NHTSA complaint #10845656, filed 2016-03, 7,800 miles

Related service bulletins

Engine: other model years

YearComplaintsShare of year
20212153%
2020526%
20192343%
20187659%
20174370%
20166864%
20151749%
20141935%
20131725%
20122511%
2011159%
20102312%
200947%
200863%
200733%

Other parts of the 2015 Mazda CX-9

Other or unknown
9 complaints
Brakes
3 complaints
Transmission and drivetrain
3 complaints
Air bags
2 complaints
Exterior lighting
2 complaints
Visibility (wipers, defrost, mirrors)
2 complaints
Electrical system
1 complaints
Electronic stability control
1 complaints
Engine cooling
1 complaints
Fuel system
1 complaints
Seat belts
1 complaints
Seats
1 complaints

← All problems reported for the 2015 Mazda CX-9

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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