The 2018 CX-9 is less reliable than other cars from the same model year.
The Reliability score is based on our latest subscriber survey of 2018 Mazda CX-9 owners. The owner comments describe problems respondents experienced with this vehicle.
Premature pad/rotor wear, pulsation or vibration, antilock system, parking brake, master cylinder, calipers, squeaking, brake failure, regenerative braking.
"Parking brake light and actuator. This was the third problem with the same system in 5 years"
Anonymous, MI (2018 Mazda CX-9 Touring 2.5-L 4 Cyl turbo)"Constant squeaking after pads changed. Never stopped"
Anonymous A., CA (2018 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.
"Bushings deterioration. Replaced"
Anonymous, VA (2018 Mazda CX-9 Touring 2.5-L 4 Cyl turbo)"When turning, steering wheel makes squeaky noise. WD-40 does not help"
Anonymous, CA (2018 Mazda CX-9 Grand Touring 2.5-L 4 Cyl turbo)""Broken sway bar link, rattle on a rough road at low speed""
Anonymous, VA (2018 Mazda CX-9 Touring 2.5-L 4 Cyl turbo)Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.
"A cracked cylinder head left the vehicle stranded. The dealer agreed to pick up half the cost, yet it still cost over $3000. A few months later, Mazda recognized the issue as a manufacturing defect and agreed to cover the rest of the cost."
Anonymous, WI (2018 Mazda CX-9 Grand Touring 2.5-L 4 Cyl turbo)"bad head gasket 3800.00 to repair"
Anonymous A., GA (2018 Mazda CX-9 Touring 2.5-L 4 Cyl turbo)"Turbo had a crack not under warranty"
Anonymous, NC (2018 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.
"Doesn't launch automatically."
Anonymous, NC (2018 Mazda CX-9 Touring 2.5-L 4 Cyl turbo)"Reboots frequently"
Anonymous, NC (2018 Mazda CX-9 Touring 2.5-L 4 Cyl turbo)Radiator, cooling fan, water pump, thermostat, antifreeze leaks, overheating.
"caused by bad head gasket"
Anonymous A., GA (2018 Mazda CX-9 Touring 2.5-L 4 Cyl turbo)"Overheating,blown headgast,covered under warranty"
Anonymous, NC (2018 Mazda CX-9 Grand Touring 2.5-L 4 Cyl turbo)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.
"Passenger front heated seat didn't work. Was fixed by dealership"
Anonymous, FL (2018 Mazda CX-9 Sport 2.5-L 4 Cyl turbo)Driveshaft or axle, CV joint, differential, transfer case, four-wheel-drive/all-wheel-drive components, driveline vibration, electrical failure, traction control, electronic stability control.
"The left axle seal was leaking and the axle required replacement. My mechanic found the problem during a routine check-up during an oil change."
Anonymous A., RI (2018 Mazda CX-9 Touring 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.
AC compressor, blower (fan) motor, condenser, evaporator, heater system, automatic climate system, electrical failure, refrigerant leakage.
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.
Gear selector and linkage, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission, leaks.
Muffler, pipes, catalytic converter, exhaust manifold, heat shields, leaks.
Squeaks, rattles, wind noises, seals and/or weather stripping, air and water leaks.
Transmission rebuild or replacement, torque converter, premature clutch replacement.
Paint (fading, chalking, peeling, or cracking), loose interior or exterior trim or moldings, rust.
Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, fuel leaks, oil leaks.
Sensors (O₂, or oxygen, sensor), emission-control devices (includes EGR), fuel-injection system, fuel gauge/sender, fuel pump, problems filling up the tank.
"The electronic parking brake could not be reset and showed a warning light on the dash. This was the third time in six years that the electronic braking system has failed/posted warnings."
Anonymous A., MI (2018 Mazda CX-9 Touring 2.5-L 4 Cyl turbo)