The 2021 CX-9 is less reliable than other cars from the same model year.
The Reliability score is based on our latest subscriber survey of 2021 Mazda CX-9 owners. The owner comments describe problems respondents experienced with this vehicle.
Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.
"Catastrophic engine failure, resulting in the engine needing replaced."
Anonymous, SC (2021 Mazda CX-9 Grand Touring 2.5-L 4 Cyl turbo)"Leaking exhaust valves caused slow lose of oil. There was a service bulletin but no recall as far as I know.Dealer replaced valves and no problems since."
Anonymous, FL (2021 Mazda CX-9 Grand Touring 2.5-L 4 Cyl turbo)Infotainment system (audio, GPS, phone), rear entertainment system, backup or other camera/sensors, head-up display.
""When connecting the phone, a majority of the time the apply play does not connect. Eventually we get it to connect.""
Anonymous, NJ (2021 Mazda CX-9 Grand Touring 2.5-L 4 Cyl turbo)""Rarely, but occasionally, the screen will get stuck in certain states. The system will also occasionally reboot randomaly. Have not been able to reproduce for Mazda service.""
Anonymous, GA (2021 Mazda CX-9 Grand Touring 2.5-L 4 Cyl turbo)"Button was sticking for the 2nd row climate control panel. The whole module was replaced under warranty repair."
Anonymous, TN (2021 Mazda CX-9 Grand Touring 2.5-L 4 Cyl turbo)Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, fuel leaks, oil leaks.
"Plastic part on top of gas tank cracked and leaked fuel."
Anonymous A., VA (2021 Mazda CX-9 Touring 2.5-L 4 Cyl turbo)"Drove the car to Florida from Buffalo and the oil warning light came on. Took it for an oil change ata dealer and they told me after the service that there was a known issue with the oil system that the dealer would fix for free."
Anonymous, NY (2021 Mazda CX-9 Touring 2.5-L 4 Cyl turbo)Radiator, cooling fan, water pump, thermostat, antifreeze leaks, overheating.
"This was part of the engine failure."
Anonymous, SC (2021 Mazda CX-9 Grand Touring 2.5-L 4 Cyl turbo)AC compressor, blower (fan) motor, condenser, evaporator, heater system, automatic climate system, electrical failure, refrigerant leakage.
"it failed secondary to coil failing"
Anonymous, WA (2021 Mazda CX-9 Signature 2.5-L 4 Cyl turbo)Paint (fading, chalking, peeling, or cracking), loose interior or exterior trim or moldings, rust.
"12 to 16 months from purchase passenger side bumper pops out from fender. It has been adjusted at dealership but it popped out again a few months later."
Anonymous A., (2021 Mazda CX-9 Carbon Edition 2.5-L 4 Cyl turbo)Cruise control, clock, warning lights, body control module, keyless entry, wiper motor or washer, tire pressure monitor, interior or exterior lights, horn, gauges, 12V power plug, USB ports, alarm or security system, remote engine start, heated or cooled seats, heated steering wheel, headlights, automatic headlights, automatic wipers, wireless charging pad.
"This problem rendered the car absolutely useless. Cost 1200 to fix!"
Anonymous, FL (2021 Mazda CX-9 Grand Touring 2.5-L 4 Cyl turbo)Shocks or struts, ball joints, tie rods, wheel bearings, alignment, steering linkage (includes rack and pinion), power steering (pumps and hoses, leaks), wheel balance, springs or torsion bars, bushings, electronic or air suspension.
Premature pad/rotor wear, pulsation or vibration, antilock system, parking brake, master cylinder, calipers, squeaking, brake failure, regenerative braking.
Windows, locks and latches, doors or sliding doors, tailgate, trunk or hatch, mirrors, seat controls (power or manual), seat belts, sunroof, convertible top, glass defect.
Muffler, pipes, catalytic converter, exhaust manifold, heat shields, leaks.
Squeaks, rattles, wind noises, seals and/or weather stripping, air and water leaks.
Gear selector and linkage, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission, leaks.
Transmission rebuild or replacement, torque converter, premature clutch replacement.
Driveshaft or axle, CV joint, differential, transfer case, four-wheel-drive/all-wheel-drive components, driveline vibration, electrical failure, traction control, electronic stability control.
Sensors (O₂, or oxygen, sensor), emission-control devices (includes EGR), fuel-injection system, fuel gauge/sender, fuel pump, problems filling up the tank.
Alternator, starter, hybrid battery replacement, hybrid battery related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, spark plugs and wires failure, auto stop/start.
""The car used a lot of oil, there were a recall from Mazda and the problem was fixed""
Anonymous, FL (2021 Mazda CX-9 Touring 2.5-L 4 Cyl turbo)