Reliability Guide

Common Problems with the
2021 MG ZS EV

Mid-cycle models benefit from software updates and improved build quality. These are often the best value examples, offering the full ZS EV experience with fewer teething issues.

What changed for 2021

  • Introduction of Long Range models
  • Updated infotainment software
  • Revised suspension tuning

Common MOT watch-outs

  • !Continued 12V battery issues on some examples
  • !Infotainment glitches requiring updates
  • !Regenerative braking sensitivity
4
Known Issues
0
Serious
3
Moderate
1
Minor

All Known Issues

12V Battery Drainage

ModerateElectrics & Electronics

The 12V battery can go flat if the car is left for long periods or if the "MG iSmart" app wakes the car too often.

Est. Repair Cost: £150–£250
Warning Signs:

Car won't start, Multiple error messages on dash, Keyless entry failing

What to Inspect:
  • Check if the 12V battery has been replaced with an uprated (AGM) unit
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Charging Port Latch Failure

ModerateBodywork & Rust

The front charge port door can become difficult to open or lock, sometimes due to a faulty actuator.

Est. Repair Cost: £100–£200
Warning Signs:

Charge flap won't open, Locked cable won't release

What to Inspect:
  • Operate the charge flap multiple times
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Infotainment Software Bugs

ModerateElectrics & Electronics

The infotainment system can suffer from random reboots, Bluetooth disconnections, and slow responsiveness. Software updates from the dealer are often required to fix known issues.

Est. Repair Cost: Software Update / £0
Warning Signs:

Screen freezing mid-drive, Bluetooth dropping out, Slow to boot on startup

What to Inspect:
  • Test all infotainment functions for 10+ minutes
  • Check that the latest software has been applied
Verified by IsItAGoodCar Research Team

Regenerative Braking Sensitivity

MinorBrakes

The regenerative braking can feel overly aggressive for some drivers, particularly in the default driving mode. This can make smooth deceleration difficult in traffic.

Est. Repair Cost: £0
Warning Signs:

Abrupt deceleration when lifting off the throttle, Passengers lurching forward, Difficulty modulating speed in traffic

What to Inspect:
  • Test the different regenerative braking levels during the test drive
Verified by IsItAGoodCar Research Team

Buying Tips for 2021 MG ZS EV

  • Ask if all software updates have been applied
  • Test the regenerative braking levels
  • Check the battery health report