2019 Mazda CX-5: What to check before buying

Cylinder heads crack and dump oil onto the hot exhaust side of the engine. Drivers notice a burning-oil smell in the cabin, white smoke from under the hood, and oil pooling on the ground. Some cracks leak coolant instead and trigger an overheating warning. Many cars show no warning light until oil runs low. Failures cluster between about 30,000 and 80,000 miles, often just after the powertrain warranty ends, and repair quotes reach $8,000. Timing cover and valve cover gasket leaks also appear. One report is fire-related, and several owners call the oil near the exhaust manifold a fire risk.

The touchscreen registers phantom inputs, the widely reported "ghost touch" fault. It changes stations, skips songs, raises the volume, places phone calls, and drops CarPlay without any input. Some screens freeze or reboot while driving. Dealer screen repairs are quoted at roughly $500 to $1,000, and some owners doubt they work. A smaller group reports sudden power loss or rough running at highway speed with dash lights going out, plus limp mode with radar and smart brake malfunction messages. One filing is crash-related, and one fire-related report starts near a passenger door speaker.

Cracked cylinder heads dominate here too. Oil leaks onto the exhaust manifold and engine bay, and the only warning is often a burning smell, smoke, or a low-oil light. Reported mileages run from about 30,000 to 67,000. A separate pattern is transmission failure well under 30,000 miles, where the car stops moving or shuts down on the highway and needs a full transmission. Two crash reports, each with an injury, describe a parked car rolling away and striking its owner. Stalling and limp mode at freeway speed also appear.

Windshields crack and chip easily, including stress cracks with no sign of impact, and some owners report repeat replacements. Auto-folding side mirrors stop opening fully, cutting rear visibility, and dealers often decline the fix outside warranty even though a service bulletin exists. Other reports include wind whistling through the windshield at high speed, a glass sunroof bursting at highway speed, wiper arms installed on the wrong sides, and automatic emergency braking that activates with no hazard ahead.

Glass sunroofs shatter suddenly with a loud bang while driving, and one owner was cut near the eye by falling glass. Wind noise is the most common complaint here: squeaks and whistles from the front doors and mirror area at highway speeds, worse in crosswinds. Soul Red paint chips down to the primer on the hood within the first months of ownership. The driver-side mirror glass can vibrate badly at speed, and dealers have been unable to fix it.

The car slows or brakes on its own. Radar cruise control cuts speed sharply in curves even with no car ahead, and in one case braked hard while passing a truck at highway speed. Other cars refuse to accelerate past about 30 mph when merging, often on the first drive of the day alongside a radar visibility warning. An overheating fault can limit the car to 20 mph in traffic. One report describes unintended acceleration from a stop. Dealers often cannot reproduce these faults.

The airbag warning light comes on or blinks while driving, sometimes clearing by itself without a diagnosis. In one case the fault traced to a defective driver airbag. The passenger airbag status light can stay on with the seat empty, and a dealer warranty fix for dirty seat wiring contacts did not last. One crash report says the airbag did not deploy during a low-speed parking-lot collision. Owners report diagnostic charges when no recall applies.

Only two complaints exist, so no clear pattern is visible. In one rear-end crash with two injuries, the driver's headrest tore completely out of the seat and gave no neck support on impact. The other report describes the rear seatback behind the driver rattling and failing to lock tight when a passenger sits there. Both point to seat hardware that may not stay secure under load.