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Engine coolingPart report

2019 Mazda CX-5 Engine cooling Problems

Complaints
4about this part
Share
1%of 272 total for the year
Median mileage
86,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 4 complaints about the engine cooling of the 2019 Mazda CX-5, 1% of the 272 complaints for this model year. Where a mileage was given, the median is 86,000 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.

“The contact owns a 2019 Mazda CX-5. The contact stated that while the vehicle was parked, the contact discovered an abnormal odor coming from the engine compartment. No warning light was illuminated. The vehicle was taken to a dealer, where it was diagnosed that there was a cracked cylinder head and that the cylinder head needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 26,000.”

NHTSA complaint #11649241, filed 2025-03, 26,000 miles

“The contact owns a 2019 Mazda CX-5. The contact stated became aware of engine oil on his driveway. The contact stated that while driving and coming to a stop, there was an abnormal oil burning odor inside the vehicle. The contact stated the check engine warning was illuminated. The contact had taken the vehicle to an independent mechanic who diagnosed that there was an oil leak coming from the cylinder head and determined that the cylinder head needed to be replaced. …”

NHTSA complaint #11507876, filed 2023-02, 89,000 miles

“The contact owns a 2019 Mazda CX-5. The contact stated that while driving at 55 MPH and turning into a driveway, smoke emerged from the engine compartment. The vehicle was turned off and inspected. Upon opening the hood, smoke was observed near the rear firewall of the engine compartment, and oil was leaking under the engine compartment. The source of the leak could not be identified initially, and the vehicle was towed to an independent mechanic, where a leaking cylinder head was diagnosed. The vehicle was not repaired. …”

NHTSA complaint #11759696, filed 2026-08, 100,000 miles

“The contact owns a 2019 Mazda CX-5. The contact stated that while driving 30 MPH with a toddler occupying the rear seat, the contact noticed smoke and an abnormal burning rubber odor coming through the vents. The contact pulled into a gas station and then pulled into a nail salon parking lot. There was no warning light illuminated. The contact was able to drive to the residence, where an independent mechanic inspected the vehicle and found an oil leak, and the mechanic diagnosed that the cylinder head had cracked. The vehicle was taken to the dealer. …”

NHTSA complaint #11687533, filed 2025-09, 83,000 miles

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
202323%
202121%
202011%
201941%
201831%
201711%
201610%
201511%
201311%

Other parts of the 2019 Mazda CX-5

Engine
132 complaintsOther or unknown
50 complaintsElectrical system
46 complaintsTransmission and drivetrain
32 complaintsFuel system
21 complaintsForward collision avoidance
16 complaintsVehicle speed control
12 complaintsVisibility (wipers, defrost, mirrors)
10 complaintsAir bags
7 complaintsBody and structure
7 complaintsBrakes
6 complaintsExterior lighting
3 complaints

← All problems reported for the 2019 Mazda CX-5

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