IsItAGoodCar
Reliability Guide

Common Problems with the
2018–2020 Hyundai Kona (Petrol/Hybrid)

We've identified 3 known issues that can affect the 2018–2020 Hyundai Kona (Petrol/Hybrid). None are considered critical, but they're worth knowing about before you buy.

3
Known Issues
0
Serious
3
Moderate
0
Minor

All Known Issues

DCT Shudder & Hesitation

ModerateGearbox & Transmission

The dual-clutch transmission can be jerky at low speeds or shudder when pulling away, particularly if the car has been "crept" in traffic.

Est. Repair Cost: £500–£1,500
Warning Signs:

Jerky take-off, Hesitation when merging, Vibration in stop-start traffic

What to Inspect:
  • Test drive in heavy traffic
  • Check for TCU software updates
Verified by IsItAGoodCar Research Team

GPF (Gasoline Particulate Filter) Clogging

ModerateExhaust & Emissions

Models with a GPF (mostly post-2018) can suffer from clogging if driven only on short, low-speed trips, leading to warning lights and reduced power.

Est. Repair Cost: £0 (Regeneration) to £1,000 (Replacement)
Warning Signs:

Check exhaust system warning, Reduced engine performance

What to Inspect:
  • Ask about typical driving style (motorway vs city)
  • Check for "Active Regeneration" history
Verified by IsItAGoodCar Research Team

12V battery drain and flat battery

ModerateElectrics & Electronics

The small 12V auxiliary battery can drain when the car is left standing for several days, particularly if Bluelink or third-party apps keep waking the systems overnight. A flat 12V leaves the car completely dead despite a full main battery.

Est. Repair Cost: £100–£250
Warning Signs:

Car completely dead after standing, Dashboard flickers or rapid clicking from relays, "12V battery low" warning on dashboard

What to Inspect:
  • Age and health of the 12V battery
  • Whether third-party apps (e.g., Optiwatt) are installed
  • Dealer records for BMS software updates
Verified by IsItAGoodCar Research Team

Buying Tips for 2018–2020 Hyundai Kona (Petrol/Hybrid)

  • On Hybrid and 1.6T models, test the 7-speed DCT for smoothness in traffic and on hills.
  • Check for "Check Exhaust System" messages, which can indicate a clogged Gasoline Particulate Filter (GPF).
  • Check the infotainment screen for any "ghost touching" or dead zones.
  • Inspect the rear suspension on AWD models for any signs of hard use or towing wear.
20172021
Check a 2018–2020 Hyundai Kona (Petrol/Hybrid) by Registration