Owners have reported 9 crashes and 13 injuries to NHTSA for the 2021 Mazda CX-30. These are unverified owner reports, not confirmed defect rates.
Owner complaints36
ENGINE
Owners report that the 2021 Mazda CX-30 frequently experiences excessive oil consumption, with many noting the low engine oil warning light activating between 3,000 to 6,800 miles after an oil change. Complaints frequently mention the need to add approximately one quart of oil every 1,500 to 5,500 miles, and some owners indicate that Mazda has issued a service bulletin acknowledging the issue without providing a definitive factory solution. While no crashes or fires are reported, some owners express concerns about potential engine damage or failure due to low oil levels. Buyers considering a used model should be aware of these recurring oil consumption issues, especially in vehicles with mileage around 25,000 to 36,500 miles.
Owner complaints9
ELECTRICAL SYSTEM
Owners report frequent issues with the electrical system of the 2021 Mazda CX-30, particularly involving battery drainage and starting problems. Multiple complaints describe the vehicle's battery draining overnight or requiring frequent jump-starts, with some owners noting that the problem persists despite battery replacement. Symptoms include critical engine errors, low voltage warnings, and intermittent starting failures, often occurring around 21,000 to 30,590 miles. Some reports indicate that the vehicle stalls while driving, posing potential safety risks. Additionally, owners mention issues with the USB or display systems and key start malfunctions, which may suggest broader electrical system concerns.
Owner complaints8
VISIBILITY/WIPER
Owners of the 2021 Mazda CX-30 frequently report issues with windshield distortion, which they describe as wavy or warped, leading to symptoms such as eye strain, headaches, and fatigue during driving. This distortion is often noted on both the driver's and passenger's sides, and some owners mention that Mazda considers this normal, particularly near the pillars. Complaints also highlight incidents of windshields cracking from minor chips and sunroofs shattering outward without apparent external impact. These issues are reported by some owners upon purchasing the vehicle as a certified pre-owned model, with mileage as low as 6,000 miles. The described symptoms and occurrences suggest potential safety implications due to impaired visibility and driver discomfort.
Owner complaints7
UNKNOWN OR OTHER
Owners of the 2021 Mazda CX-30 report several issues, primarily concerning oil consumption and electrical warnings. Multiple complaints highlight a recurring problem with low oil levels, often occurring between 1,000 to 5,000 miles after an oil change, with some owners needing to add oil frequently, suggesting potential engine or turbo system issues. Additionally, several owners experience persistent "Low Battery Voltage" warnings, even when the vehicle is not in use, indicating possible electrical or software malfunctions. A few reports also mention impaired visibility due to sun visors not staying in place and issues with safety and driver support systems being partially disabled. No crashes or fires are reported, but the issues could lead to maintenance challenges and potential safety concerns for prospective buyers.
Owner complaints7
POWER TRAIN
Owners report recurring issues with the power train of the 2021 Mazda CX-30, particularly involving low oil levels and transmission failures. Complaints frequently mention the illumination of low oil warning lights and subsequent confirmation of low oil levels, sometimes linked to valve seal assembly problems. Additionally, several owners describe sudden loss of acceleration or erratic acceleration behavior, often diagnosed as transmission failure, which poses safety risks when driving at highway speeds. Electrical complications, such as corroded wiring harnesses leading to engine malfunction warnings, are also noted. These issues are reported across various mileage ranges, with some occurring as early as 3 months into ownership.
Owner complaints7
SERVICE BRAKES
Owners of the 2021 Mazda CX-30 report issues with unintended acceleration and premature rear brake wear. Complaints frequently mention the vehicle accelerating unexpectedly, sometimes resulting in crashes, with one incident leading to an injury. The unintended acceleration incidents often occur during low-speed maneuvers such as parking, and in some cases, the brake pedal is reported as unresponsive. Additionally, multiple owners describe rapid rear brake wear, needing replacement within approximately 18 months of purchase. These issues are reported at mileages ranging from 22,000 to 31,000 miles. Safety implications include the potential for collisions due to loss of control, as evidenced by the reported crashes.
Severity signals: 3 crash, 0 fire, 1 injury reports
Owner complaints5
VEHICLE SPEED CONTROL
Owners of the 2021 Mazda CX-30 report issues with the vehicle speed control, particularly related to unexpected acceleration and difficulty in controlling speed. Complaints frequently mention the vehicle accelerating independently, sometimes resulting in crashes, as in two cases where the vehicle hit a building and a brick pillar. Symptoms include sudden lunging forward, hard acceleration when using adaptive cruise control, and failure to stop even when the brake pedal is depressed. These incidents occur at varying mileages, with one crash reported at approximately 1,000 miles and another at around 47,000 miles. Safety implications are significant, with one crash resulting in injuries, highlighting potential risks for prospective buyers.
Severity signals: 2 crash, 0 fire, 1 injury reports
Owner complaints3
FORWARD COLLISION AVOIDANCE
Owners of the 2021 Mazda CX-30 report issues with the forward collision avoidance system, primarily involving unexpected emergency braking. In one instance, the system engaged without any obstruction, causing the vehicle to stop suddenly, though no crash occurred due to adequate spacing from other vehicles. Another complaint describes the automatic braking activating during a left turn at a signalized intersection, despite no immediate hazard, with the owner noting the presence of debris on the sensor. One significant incident involved a failure to stop while on cruise control, leading to a crash with injuries. These issues are reported around 14,000 miles, highlighting potential safety implications for prospective buyers.
Severity signals: 1 crash, 0 fire, 4 injury reports
Owner complaints2
SEATS
Owners of the 2021 Mazda CX-30 report issues related to the seats, with a focus on seatbelt and seatback mechanisms. One complaint describes a driver seatbelt retractor failure, which prevents the seatbelt from retracting and could compromise safety in a collision due to the pretensioner not functioning. Another owner notes a loose seatback fold mechanism at only 23,000 miles, suggesting early wear or mechanical issues. These reports highlight potential safety concerns with the seatbelt and durability issues with the seatback, which prospective buyers should consider.
Owner complaints2
AIR BAGS
Owners report issues with airbag deployment in the 2021 Mazda CX-30, particularly during crashes. Complaints frequently mention that side and frontal airbags fail to deploy upon impact, even in severe collisions. In one case, the side airbags did not deploy during a crash that resulted in the vehicle being totaled, with two injuries reported. Another complaint describes frontal airbags not deploying in a separate crash, also resulting in a total loss and one injury. These incidents occur at mileage as low as 13,450, indicating potential early-life concerns. Safety implications are significant, with reports of crashes and multiple injuries, suggesting prospective buyers should consider these factors when evaluating this vehicle.
Severity signals: 2 crash, 0 fire, 3 injury reports
