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2021 Mazda CX-30

Owner reports · Recalls · Investigations

More warning signs than most CX-30 years

Owner complaints for the 2021 Mazda CX-30 are substantially higher than the model-year median of 31.

About this comparison →

How this year compares

Owner complaints by model year

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Counts vary with age, sales and reporting. They are not failure rates.

What owners reported most

All reported categories

Tap a category to read its complaints. One report may name several components.

When problems were reported

Mileage at the reported incident

Limited mileage data: 13 of 100 reports include usable mileage. There isn’t enough coverage to show a useful chart.

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Engine. Review the 49 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 13 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Forward Collision Avoidance. Review the 12 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

10 crash reports0 fire reports7 injury reports

Vehicle Speed Control complaints

8 reports
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47,000 miles · Aug 13, 2025
Vehicle Speed ControlCrash

The contact owns a 2021 Mazda CX-30. The contact stated that while driving at an undisclosed speed, the accelerator pedal was slightly depressed; however, the vehicle speed increased significantly independently. The contact stated that the failure occurred as the contact arrived at the contact's residence and was attempting to p…

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The contact owns a 2021 Mazda CX-30. The contact stated that while driving at an undisclosed speed, the accelerator pedal was slightly depressed; however, the vehicle speed increased significantly independently. The contact stated that the failure occurred as the contact arrived at the contact's residence and was attempting to park the vehicle. The contact stated that the brake pedal was depressed; however the vehicle failed to stop, and the vehicle was uncontrollable. The contact stated that the vehicle crashed into the contact’s apartment building. The contact stated that the building siding and steps were damaged due to the failure. The contact was not injured; however the failure had caused serious anxiety issues for the contact. The vehicle was towed to a local tow yard. In addition, the contact stated that the vehicle was towed to the dealer two times prior to the failure because, when attempting to start the vehicle, the vehicle failed to start. The contact was informed that the vehicle's not starting was the result of a faulty battery, and the battery was replaced. In addition, the contact stated that the independent acceleration failure had occurred the day before the crash occurred; however the contact was planning to take the vehicle to the dealer the following day. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was approximately 47,000.

NHTSA ODI #11680382

31,000 miles · Jan 14, 2025
Service Brakes, HydraulicVehicle Speed ControlCrashInjury

The contact owned 2021 Mazda CX-30. The contact stated while attempting to park the vehicle in the parking garage at her workplace, the contact reversed and then straightened the steering wheel; however, after shifting to drive and attempting to drive 6-10 feet forward into the parking space, the vehicle unintendedly accelerated…

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The contact owned 2021 Mazda CX-30. The contact stated while attempting to park the vehicle in the parking garage at her workplace, the contact reversed and then straightened the steering wheel; however, after shifting to drive and attempting to drive 6-10 feet forward into the parking space, the vehicle unintendedly accelerated and crashed into a pillar before coming to a stop. The contact stated that the engine had revved up, and the vehicle made an abnormally loud sound before the vehicle unintendedly accelerated. The contact stated that the brake pedal was depressed but the vehicle failed to respond, and the vehicle failed to stop as needed. There was no warning light illuminated. The contact stated that the air bags deployed as intended; however, a warning light indicating an air bag malfunction illuminated afterwards. The contact stated that the front driver's side and knee air bags had deployed as designed. The contact sustained pain and bruises on the left side of the chest, on the upper part of the left breast, on the left leg, and on the right wrist and right arm. The vehicle automatically called 9-1-1 for Emergency Assistance, but the contact declined to receive medical assistance. The contact was able to walk away from the scene. No Police report was filed. The contact was unsure whether there was any property damage. The vehicle was towed from the scene and totaled by the Insurance Company. The contact stated that the failure had occurred once before while driving at approximately 60-65 MPH, and the vehicle unintendedly accelerated with an abnormal sound coming from the vehicle, but the contact was able to depress the brake pedal and regained control of the vehicle. The dealer and the manufacturer were not yet notified of the failure. The failure mileage was approximately 31,000.

NHTSA ODI #11635826

Mileage unknown · Aug 17, 2024
EnginePower TrainVehicle Speed Control

While I was driving on I-90, I lost control of the acceleration of my vehicle. The vehicle was towed and has been diagnosed with a failed transmission! The car would not accelerate or it would accelerate in bursts or rapidly slow down. I was able to pull over and the car failed to move at all after. My safety and others was put …

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While I was driving on I-90, I lost control of the acceleration of my vehicle. The vehicle was towed and has been diagnosed with a failed transmission! The car would not accelerate or it would accelerate in bursts or rapidly slow down. I was able to pull over and the car failed to move at all after. My safety and others was put at risk as I lost the ability to control the speed of the vehicle on a road where the speed limit is 65mph in traffic around me. When the problem began no lights illuminated, until ~30 seconds in the yellow engine failure light illuminated and then the yellow transmission failure light illuminated. The car was brought to a dealership for inspection and they diagnosed it as a transmission failure. This is unacceptable for such a young vehicle (2021). It should be noted that the car manufacturer immediately approved the replacement the same day it was diagnosed (dealership said it usually takes 48 hours), but the part is back-ordered for months (probably because they know this is happening and trying to cover it up).

NHTSA ODI #11609112

Mileage unknown · Jun 27, 2024
EngineVehicle Speed Control

Car lunged forward when lightly stepping on the gas while making a turn onto a busy street. Then it later lagged in responding when I stepped on the gas. About 5 minutes later, the car dashboard lit up and said there was a transmission error. Mechanic's diagnosis found code P0756 for a shift solenoid B stuck off. The car is…

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Car lunged forward when lightly stepping on the gas while making a turn onto a busy street. Then it later lagged in responding when I stepped on the gas. About 5 minutes later, the car dashboard lit up and said there was a transmission error. Mechanic's diagnosis found code P0756 for a shift solenoid B stuck off. The car is unsafe to drive.

NHTSA ODI #11597248

Mileage unknown · Sep 7, 2023
Forward Collision AvoidanceUnknown Or OtherVehicle Speed Control

Adaptive cruise control on at 70mph, speeding car pulls into my lane with no gap (completely cut me off), hard brake by computer, I did not tap the brake to take it off of cruise, car that had cut me off zigs into another lane while adaptive cruise control has car at about 40 mph due to hard brake. As car in front pulls out of…

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Adaptive cruise control on at 70mph, speeding car pulls into my lane with no gap (completely cut me off), hard brake by computer, I did not tap the brake to take it off of cruise, car that had cut me off zigs into another lane while adaptive cruise control has car at about 40 mph due to hard brake. As car in front pulls out of the lane, adaptive cruise control guns the engine to 3500-4000 rpm since there was no obstruction in front of it anymore and it wanted to go back to the 70 mph preset. During this incident the Engine Malfunction light comes on, warning to get car serviced. Upon taking it in for service they found that the thermostat needed to be replaced? This seems unlikely. Car has only 15k miles on it. I have another model Mazda and the adaptive cruise control has gunned it in a similar manner, taking the car well past 3000 rpm. Mazda needs to reprogram.

NHTSA ODI #11543303

Mileage unknown · Jun 7, 2023
Forward Collision AvoidanceVehicle Speed Control

After setting the adaptive cruise control, and overriding it with the accelerator pedal when approaching a vehicle in front of me to pass it, my vehicle briefly accelerated hard while switching lanes after clearing the vehicle in front of me. This happened even though I had taken my foot off the accelerator already. My current s…

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After setting the adaptive cruise control, and overriding it with the accelerator pedal when approaching a vehicle in front of me to pass it, my vehicle briefly accelerated hard while switching lanes after clearing the vehicle in front of me. This happened even though I had taken my foot off the accelerator already. My current speed was also slightly higher than the set cruise speed. E.g. I set it to 75, I was driving 77 and it jumped up to 80 for a short while before settling back to 75. This acceleration happened right as I cleared the vehicle in front of me and I was in the other lane. You can feel the sudden acceleration. It is as if the radar noticed the vehicle wasn't in front of it any more so it accelerated disregarding the current speed or accelerator position.

NHTSA ODI #11525939

Mileage unknown · Jun 12, 2022
Electrical SystemPower TrainVehicle Speed Control

Randomly accelerated on its own; burns oil- low oil levels twice in 6 months; randomly says cruise control is available under 25 mph when car is traveling at highway speeds; the unlock and lock functions randomly fail; lift gate randomly opens; alarm system randomly goes off; TERRIBLE fuel economy (18-21 mpg)

NHTSA ODI #11468850

1,000 miles · Feb 23, 2022
Vehicle Speed ControlCrashInjury

The contact owns a 2021 Mazda CX-30. The contact stated while driving at an unknown speed, the vehicle accelerated independently and hit a brick pillar. The contact stated no warning light was illuminated. The air bags did not deploy. The contact sustained injuries on her neck, back, and also had headaches. The contact did seek …

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The contact owns a 2021 Mazda CX-30. The contact stated while driving at an unknown speed, the vehicle accelerated independently and hit a brick pillar. The contact stated no warning light was illuminated. The air bags did not deploy. The contact sustained injuries on her neck, back, and also had headaches. The contact did seek medical attention at the emergency room. A police report was filed. The vehicle was not drivable. The vehicle was towed. The contact called the local dealer and made them aware of the failure. The vehicle was not diagnosed or repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 1,000.

NHTSA ODI #11453651

Official recalls

2

21V101000 · Tires:valve

Feb 22, 2021

Mazda North American Operations (Mazda) is recalling certain 2021 Mazda3 and CX-30 vehicles. Air may suddenly leak from the tire air valve.

Consequence & remedy

Consequence: A sudden air leak from the tire air valve may cause a loss of vehicle control while driving, increasing the risk of a crash.

Remedy: Mazda will notify owners, and dealers will replace all four tire air valves with new parts, free of charge. The recall began April 6, 2021. Owners may contact Mazda customer service at 1-800-222-5500 Option 4. Mazda's number for this recall is 4721B.

21V086000 · Structure:body:hatchback/liftgate

Feb 18, 2021

Mazda North American Operations (Mazda) is recalling certain 2020-2021 CX-30 vehicles. When fully opened, the power liftgate may partially lower unexpectedly when the vehicle is parked facing uphill on a slope.

Consequence & remedy

Consequence: If the power liftgate unexpectedly lowers while a person is accessing the rear storage area of the vehicle, it can increase their risk of injury.

Remedy: Mazda will notify owners, and dealers will update the power liftgate control module software and inspect the serial number of the power liftgate drive unit, replacing it if necessary, free of charge. The recall began April 8, 2021. Owners may contact Mazda customer service at 1-800-222-5500 option 4. Mazda's number for this recall is 4621B.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

0

No exact-year investigations in this snapshot.