IsItAGoodCar
Reliability Guide

Common Problems with the
2021 Hyundai i30 (Gen 3)

We've identified 3 known issues that can affect the 2021 Hyundai i30 (Gen 3). 1 of these are serious faults that could be expensive to repair.

3
Known Issues
1
Serious
1
Moderate
1
Minor

All Known Issues

1.6 CRDi Timing Chain Noise

SeriousEngine

Some diesel models develop a rattle from the timing chain, often due to extended oil change intervals or tensioner issues.

Est. Repair Cost: £600–£1,200
Warning Signs:

Rattle from the engine on cold start, Metallic ticking noise

What to Inspect:
  • Listen carefully to the engine from cold
  • Check oil change frequency
Verified by IsItAGoodCar Research Team

DCT Hesitation & Judder

ModerateGearbox & Transmission

The 7-speed dual-clutch transmission can be hesitant when merging or shudder in traffic. Software updates often help, but hardware wear is possible.

Est. Repair Cost: £0–£1,500
Warning Signs:

Shudder on take-off, Hesitation when accelerating from low speed

What to Inspect:
  • Full test drive through urban and motorway speeds
  • TCU update history
Verified by IsItAGoodCar Research Team

Infotainment screen freezing and Bluetooth dropouts

MinorElectrics & Electronics

The touchscreen media unit can lock up, reboot randomly or lose Bluetooth connections, especially on early 2017–2019 cars. Dealers often need to update the software or replace the head-unit SD card to resolve persistent glitches.

Est. Repair Cost: £0–£300
Warning Signs:

Touchscreen not responding or going black mid-drive, Navigation failing to load or freezing, Bluetooth phone or audio dropping out repeatedly

What to Inspect:
  • Run the media unit for the full test drive
  • Ask whether software or map updates have been applied
  • Check if the reversing camera display also glitches
Verified by IsItAGoodCar Research Team

Buying Tips for 2021 Hyundai i30 (Gen 3)

  • On 7DCT automatics, ensure gear changes are smooth and there is no shudder when pulling away.
  • For diesels, check for a "rattle" on cold start which can indicate timing chain wear on the 1.6 CRDi.
  • Inspect the panoramic sunroof (if fitted) for creaks or signs of water ingress.
20202022
Check a 2021 Hyundai i30 (Gen 3) by Registration