Climate System
AC compressor, blower (fan) motor, condenser, evaporator, heater system, automatic climate system, electrical failure, refrigerant leakage.
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The 2020 CX-9 is more reliable than other cars from the same model year.
The Reliability score is based on our latest subscriber survey of 2020 Mazda CX-9 owners. The owner comments describe problems respondents experienced with this vehicle.
AC compressor, blower (fan) motor, condenser, evaporator, heater system, automatic climate system, electrical failure, refrigerant leakage.
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.
""The keyless entry system stopped working and the dealer made several expensive attempts to fix it by replacing modules in the doors and re-running tests. When they finished the system works properly about 80% of the time. But the times it fails to open are unpredictable and of course seem to happen when arms are full of packages making key retrieval clumsy and inconvenient. Since the repair process was a guessing game by the dealer at my expense, Im not going to pay another $1,000 for them to guess again what might be going on with this system.""
Anonymous, TX (2020 Mazda CX-9 Signature 2.5-L 4 Cyl turbo)Muffler, pipes, catalytic converter, exhaust manifold, heat shields, leaks.
"Where to begins? I have had to correct many issues with my wifes Mazda over the last 5 years. In 2022 I had to replace the spark plugs and 3 spark wires due to corrosion and misfires. In 2023 I had to replace the brake pads at 17,100 miles. No one can go through modern brake pads that fast unless they have a secret late night hobby as a street racer). Extremely unlikely for my midwestern wife. LOL. The latest issue from the Mazda was 7-8 months ago when I had to figure out why my wifes iPhone no longer connected to her Bluetooth in the car. I have yet to figure out why it stopped working but the only way we can get it to work as directly connecting the phone to the car with a lightning to usb cable. Overall, I do not recommend make and model. In plain text, Mazda sucks."
Anonymous A., IN (2020 Mazda CX-9 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.
Sensors (O₂, or oxygen, sensor), emission-control devices (includes EGR), fuel-injection system, fuel gauge/sender, fuel pump, problems filling up the tank.
Driveshaft or axle, CV joint, differential, transfer case, four-wheel-drive/all-wheel-drive components, driveline vibration, electrical failure, traction control, electronic stability control.
Premature pad/rotor wear, pulsation or vibration, antilock system, parking brake, master cylinder, calipers, squeaking, brake failure, regenerative braking.
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.
Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.
Transmission rebuild or replacement, torque converter, premature clutch replacement.
Infotainment system (audio, GPS, phone), rear entertainment system, backup or other camera/sensors, head-up display.
Squeaks, rattles, wind noises, seals and/or weather stripping, air and water leaks.
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.
Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, fuel leaks, oil leaks.
Paint (fading, chalking, peeling, or cracking), loose interior or exterior trim or moldings, rust.
Radiator, cooling fan, water pump, thermostat, antifreeze leaks, overheating.
Gear selector and linkage, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission, leaks.
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""Inconsistent performance. Sometimes the AC works and cools down, other times it doesnt and warm air is blowing.""
Anonymous, OH (2020 Mazda CX-9 Touring 2.5-L 4 Cyl turbo)