Engine overheats or leaks coolant

What got replaced

Owners who name the part that was replaced mention the head gasket (5 reports) and the thermostat (3 reports).

Recalls and investigations

One recall on the engine covers the 2019 model year. A recall on the same system isn't always the same failure, so read the defect text.

What owners paid

14 of the 26 reports quote a price. Each dot is one quote. The middle half runs $4,800 to $7,000.

When it happens

The middle half of failures fell between 36,000 and 63,000 miles, from the 13 reports that gave a mileage.

What owners wrote

“The head gasket cover is leaking leading to a great deal of smoke. The car should not be driven per my mechanic due to risk of fire”

Filed Oct 30, 2024

“CX5 Cylinder head cracked at 53,500 miles. Was driving when received engine overheating and pull over immediately warning. The car smelled like maple syrup as it was engine coolant burning. Took it to the dealership and they informed me of the cylinder failure. It is currently awaiting parts and its not under warranty.”

Filed Oct 10, 2024 · 53,500 miles

“Went to drive home from work one night, car had been normal until this event. Car suddenly began to state that it was overheating and throttled my speed down to 20 MPH. I was in the middle of traffic going 40-50 at this time. Turns out there is a VSB regarding a coolant leak that can occur and break. Nothing about how you are suddenly governed to 20 MPH”

Filed Jun 11, 2024

“Vehicle warning system notified operator of engine overheating. Operator took vehicle to repair shop where mechanic identified a cracked cylinder head. Mechanic mentioned no reason crack should have occurred, potential manufacturer defect with forged aluminum casing.”

Filed Jul 21, 2023

Other problems on this car

• Check engine light or misfire 102 reports
• Engine leaks oil 66 reports
• Infotainment, screen or backup camera fails 53 reports
• Engine stalls or loses power while driving 27 reports