IsItAGoodCar

Common Problems with the
2019–2021 Mazda CX-30 (DM)

We've identified 3 known issues that can affect the 2019–2021 Mazda CX-30 (DM). 1 of these are serious faults that could be expensive to repair.

3
Known Issues
1
Serious
1
Moderate
1
Minor

The 2019–2021 period has 2 more issues than the Mazda CX-30 (DM) average across all year periods.

All Known Issues

Smart Brake Support (SBS) False Positives

SeriousElectrics & Electronics

Early models were prone to "phantom braking" where the car detects a non-existent obstacle and applies the brakes.

Estimated cost: £0 (Software update)Affects: 2019–2021

Typical symptoms

  • •Sudden, unexpected braking
  • •Warning beep with "Brake!" message on dash

What to inspect before you buy

  • ✓Verify with a dealer that all safety system recalls and updates have been completed

12V Battery Drain

ModerateElectrics & Electronics

The 12V battery can discharge unexpectedly, often due to the keyless entry system or other modules not entering "sleep" mode correctly.

Estimated cost: £100–£200Affects: 2019–2022

Typical symptoms

  • •Car won't start after being left for a few days
  • •Low battery warnings

What to inspect before you buy

  • ✓Ask if the battery has been replaced or if software updates for the BCM have been applied

Power Tailgate Malfunction

MinorElectrics & Electronics

The electric tailgate can fail to open, fail to close, or beep incessantly due to sensor or software issues.

Estimated cost: £200–£600Affects: 2019–2023

Typical symptoms

  • •Tailgate reverses when closing
  • •Beeping sounds but no movement

What to inspect before you buy

  • ✓Test the tailgate multiple times using both the button and the key fob

Buying Tips for the 2019 Mazda CX-30 (DM)

  • ✓Battery drain is a common complaint; consider a trickle charger if the car is rarely used.
  • ✓Check for software updates regarding the Smart Brake Support system.
  • ✓Ensure the infotainment system has the latest firmware to avoid glitches.
2022 Mazda CX-30 (DM)

Browse 2019–2021 Mazda CX-30 (DM) in our Directory

View MOT history, registration data, and reliability scores for 2019–2021 Mazda CX-30 (DM) vehicles.

View 2019–2021 Directory

Other Mazda CX-30 (DM) Year Periods

2019–2021202220232024

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