2020 model year · 2,500+ owner reports · Updated April 2026
According to Au7o's analysis of 2,500+ owner reports, the 2020 Mazda CX-3 has 4 documented known issues. No issues are rated critical, indicating generally reliable ownership. The most commonly reported issue is Automatic Transmission Shudder with 950 owner reports. Across all issues, repair costs range from $150 to $1,800. DIY maintenance guides at au7o.io.
On the 2016-2021 Mazda CX-3, the 6-speed automatic transmission in the CX-3 develops a shudder or vibration during light-throttle acceleration at low to moderate speeds (20-45 mph). The torque converter lockup clutch is the typical culprit, with worn friction material causing slip-stick behavior. A transmission fluid change can temporarily resolve the issue, but severe cases require torque converter replacement.
Perform a complete transmission fluid drain and fill with Mazda ATF FW (not a flush). If shudder persists after fluid change, torque converter replacement is required. TCM reprogramming may also improve shift quality.
Parts and tips from 950+ owners who fixed this issue
On the 2016-2021 Mazda CX-3, the A/C compressor in the CX-3 fails prematurely, often between 40,000-80,000 miles. Internal bearing failure and clutch plate wear are the common failure modes. When the compressor seizes, it can send metal debris through the entire A/C system, requiring additional component replacement (condenser, expansion valve, receiver/drier).
Replace A/C compressor, receiver/drier, and expansion valve. If compressor seized and sent debris, also replace the condenser and flush all lines. Recharge with R-134a to factory specification. Install a new compressor with fresh PAG oil.
Parts and tips from 700+ owners who fixed this issue
On the 2016-2021 Mazda CX-3 2.0 Skyactiv-G, the 2016-2021 Mazda CX-3 with the 2.0L Skyactiv-G direct injection engine develops carbon deposits on the intake valves over time. Because direct injection sprays fuel directly into the combustion chamber rather than over the intake valves, there is no fuel wash to clean the valve backsides. Oil vapors from the PCV (Positive Crankcase Ventilation) system coat the intake valves and bake into hard carbon deposits. This gradually restricts airflow, causing misfires on cold starts, loss of low-end power, and reduced fuel efficiency. Using conventional oils with high volatility worsens the problem by producing more PCV vapors.
Parts and tips from 0+ owners who fixed this issue
On the 2016-2021 Mazda CX-3, cX-3 rear brakes produce excessive grinding, squealing, and scraping noises, often well before pads reach minimum thickness. The rear brake design with integrated parking brake drum-in-hat causes uneven pad contact and noise. Rear pads on the CX-3 also wear faster than expected due to the electronic brake force distribution (EBD) system applying more rear brake bias than typical.
Replace rear brake pads with higher-quality ceramic pads (Akebono, Bosch QuietCast). Clean and lubricate caliper slide pins and pad contact points with CRC Silaramic grease. Resurface or replace rotors if they have developed lip or scoring.
Parts and tips from 850+ owners who fixed this issue
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
Mazda North American Operations (Mazda) is recalling certain 2014-2018 Mazda3 and 2016-2021 CX-3 vehicles. The rearview camera image may not display properly by showing a flickering or distorted image.
FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
Mazda North American Operations (Mazda) is recalling certain 2018 Mazda3, Mazda6, 2019 CX-3, 2018-2019 MX-5, CX-5, CX-9, and 2019-2020 Mazda2 vehicles. The impeller inside the low-pressure fuel pump may crack and deform, potentially causing the fuel pump to fail.
Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.
Don't see your problem? Describe your symptoms to get a diagnosis, or get a full repair guide.
According to Au7o's analysis of 2,500+ owner reports, the 2020-2020 Mazda CX-3 has 4 documented issues. The most frequently reported are: Automatic Transmission Shudder, A/C Compressor Failure, Skyactiv 2.0L Intake Valve Carbon Buildup. None are rated critical, but regular maintenance is recommended.
The 2020-2020 Mazda CX-3 has 4 known issues documented across 2,500+ owner reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Mazda CX-3 issues range from $150 to $1,800, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
The 6-speed automatic transmission in the CX-3 develops a shudder or vibration during light-throttle acceleration at low to moderate speeds (20-45 mph). The torque converter lockup clutch is the typical culprit, with worn friction material causing slip-stick behavior. A transmiss… Repairs typically run $150-$1,800. Severity: medium.
The A/C compressor in the CX-3 fails prematurely, often between 40,000-80,000 miles. Internal bearing failure and clutch plate wear are the common failure modes. When the compressor seizes, it can send metal debris through the entire A/C system, requiring additional component rep… Repairs typically run $600-$1,500. Severity: medium.
The 2016-2021 Mazda CX-3 with the 2.0L Skyactiv-G direct injection engine develops carbon deposits on the intake valves over time. Because direct injection sprays fuel directly into the combustion chamber rather than over the intake valves, there is no fuel wash to clean the valv… Repairs typically run $400-$1,200. Severity: medium.
CX-3 rear brakes produce excessive grinding, squealing, and scraping noises, often well before pads reach minimum thickness. The rear brake design with integrated parking brake drum-in-hat causes uneven pad contact and noise. Rear pads on the CX-3 also wear faster than expected d… Repairs typically run $150-$400. Severity: low.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
