IsItAGoodCar
Reliability Guide

Common Problems with the
2021 Hyundai Bayon (BC3)

The Bayon joined the UK line-up in 2021 as a raised, crossover-styled take on the i20 family for the budget end of the small-SUV market, sold with 1.2 MPI and 1.0 T-GDi petrol engines, later with 48V mild-hybrid and iMT gearboxes.

What changed for 2021

  • •Taller ride height and plastic cladding over the i20 hatch basis
  • •1.0 T-GDi available with 48V mild-hybrid iMT from 2022
  • •Full Smartsense safety suite standard from launch

Common MOT watch-outs

  • !Anti-roll bar drop link knocks on rough roads
  • !Tyre wear from the tall, light body
  • !Rear lamp moisture ingress advisories
3
Known Issues
0
Serious
1
Moderate
2
Minor

All Known Issues

1.0 T-GDi 48V Mild-Hybrid iMT Clutch Actuator Hesitation

ModerateElectrics & Electronics

The electronic clutch-by-wire system (iMT) can exhibit hesitation or a slight surge when re-engaging gear after an engine-off coasting event, requiring electronic calibration or software update.

Est. Repair Cost: £120–£350
Warning Signs:

Slight jerk when stepping back on the throttle after coasting, Intermittent hesitation from standstill, Clutch actuator warning alert on cluster

What to Inspect:
  • Test coasting function in Eco driving mode
  • Check dealer service records for iMT software updates
Verified by IsItAGoodCar Research TeamUpdated

Infotainment Apple CarPlay / Android Auto Disconnection

MinorElectrics & Electronics

The 8.0-inch and 10.25-inch infotainment touchscreens can suffer from intermittent wireless smartphone projection dropouts, audio stutter, or screen freezing.

Est. Repair Cost: £0–£180 (Software Update)
Warning Signs:

Apple CarPlay or Android Auto suddenly disconnects, Touchscreen frozen on boot, Navigation voice guidance cuts out

What to Inspect:
  • Test smartphone mirroring during road test
  • Check system firmware version in settings menu
Verified by IsItAGoodCar Research TeamUpdated

Front Suspension Anti-Roll Bar Drop Link Knocking

MinorSuspension & Chassis

Frequent urban driving over speed humps and potholes can cause premature wear to front stabilizer drop link ball joints, producing a light metallic knock over broken pavement.

Est. Repair Cost: £90–£220
Warning Signs:

Tapping or clicking noise from front corners over speed bumps, Slight loose feel through steering on rough tarmac

What to Inspect:
  • Drive slowly over speed cushions with windows open
  • Inspect drop link dust boots for tears or play
Verified by IsItAGoodCar Research TeamUpdated

Buying Tips for 2021 Hyundai Bayon (BC3)

  • Feel for clutch actuator hesitation on iMT cars at parking-speed manoeuvres
  • Check CarPlay/Android Auto behaviour, disconnection complaints are known
  • Buy the 1.0 T-GDi if you carry passengers regularly; the 1.2 is very keen when loaded
2022–2023
Check a 2021 Hyundai Bayon (BC3) by Registration