Hyundai i20: common faults & what to check

Which Hyundai i20 are you looking at?

3 generation variants documented. Pick the shape you recognise: the faults, the servicing and the timeline below all narrow to it. Free, no account needed.

Petrol

3 variants documented

2010–2015PB2010–2015PB1.4 petrolPetrolDocumented issues3 knownSee faults & what to checkPhoto: Vauxford via Wikimedia Commons, CC BY-SA 4.0.

2010–2015PB2010–2015PB1.6 petrolPetrolDocumented issues3 knownSee faults & what to checkPhoto: Vauxford via Wikimedia Commons, CC BY-SA 4.0.

2021–nowBC32021–nowBC31.6 turbo petrol (i20 N)PetrolDocumented issues4 knownSee faults & what to checkPhoto: Alexander Migl via Wikimedia Commons, CC BY-SA 4.0.

Now narrow it to the engine

A 1.8 and a 2.4 of the same car do not fail the same way, so the faults below narrow to the engine as well as the year. Free, no account needed.

Start your free check on this Hyundai i20

No plate needed. You get the risk score, the buyer's checklist and the guided inspection for the exact car you picked above — not the whole nameplate.

The checks worth doing on a Hyundai i20 before you hand over any money. Every documented fault is listed below, each with its own page.

• Costly issue

  Conduct a cold-start hill-start test on a gradient of at least 8 degrees — note any shudder or vibration.

  See why

  D7GF1 DCT Clutch Pack Judder on Hill Starts

  The dual-clutch transmission in the i20 N GP exhibits clutch pack judder specifically during hill-start manoeuvres from cold, where the driver holds the vehicle against a gradient before release. The dry clutch design has a narrow thermal slip window; when the clutch modulates torque to prevent rollback on an incline, stick-slip oscillation develops in the clutch pack and transmits as a pronounced shudder through the driveline and cabin. The fault is most noticeable in the first 5-15 minutes of cold-weather operation. Hyundai has released TCU calibration updates to refine clutch slip modulation during hill-hold, and persistent cases require dual-clutch module replacement under the powertrain warranty.

  What you would notice

  • Vibration or shuddering through the driveline when pulling away uphill from cold
  • Judder transmitted through the gear lever, seats, and steering wheel during hill engagement
  • Harsh or inconsistent clutch bite point on inclines when cold
  • TCU fault codes related to clutch slip or modulation stored in the module
  • Momentary rollback before the clutch catches during uphill departure

  Typically $2,800–$6,500 to put right.

• Costly issue

  Test drive focused on slow-speed manoeuvring and multiple stop-start sequences.

  See why

  7-Speed DCT Dry Clutch Judder at Low Speed

  The 7DCT-equipped Hyundai i20 (GB and BC generations) exhibits the same dry dual-clutch judder and low-speed hesitation documented across all Kia/Hyundai 7DCT applications. Urban stop-start driving accelerates clutch pack wear. The issue is most noticeable on gentle take-off, slow manoeuvring, and when holding position on a slight incline. Hyundai issued transmission calibration software updates in several markets; mechanically worn clutch packs require replacement regardless of software state.

  What you would notice

  • Judder or vibration on take-off from rest
  • Jerky or hesitant low-speed driving in stop-start traffic
  • Clunking sensation when drive engages from a near-stop
  • Shudder when holding position on an incline

  Typically $300–$4,500 to put right.

• Costly issue

  Cold-start observation at the front of the engine bay.

  See why

  G3LC 1.0T Kappa Timing Chain Cold-Start Rattle

  The GB and BC-generation i20 with the G3LC 1.0T three-cylinder engine shares the documented timing chain and tensioner wear pattern with Kia Rio YB, Kia Stonic, and Kia Picanto. Cold-start rattle from chain slack before oil pressure builds is the primary presentation. Hyundai has updated the tensioner part number in later production runs to address the design limitation. Higher-mileage examples with irregular oil service history show the fastest chain degradation. Failure to address chain stretch can result in timing errors and valve damage.

  What you would notice

  • Cold-start metallic rattle from front of engine, usually clearing within seconds when warm
  • Rattle persisting after warm-up in advanced cases
  • P0016 or P0017 OBD fault codes
  • Rough idle or hesitation at cold startup

  Typically $900–$2,300 to put right.

• Costly issue

  Run the AC on max on the test drive and confirm it gets genuinely cold and stays cold at idle.

  See why

  Weak or failing air conditioning (compressor and hose leaks)

  Air conditioning is a well-known weak point on the PB i20: the system often cools poorly, usually from a leaking discharge hose at its crimped ferrule or a failing compressor, sometimes after only 50,000-70,000 km. The compressor clutch coil can also short so power reaches it but the clutch won't engage. It's a comfort issue, not a safety one, but AC repairs on a cheap car can cost more than expected, so test it thoroughly.

  What you would notice

  • Air con blows warm or only cools weakly
  • Cools at speed but not at idle
  • Hissing or oily residue near the AC hoses
  • Compressor doesn't click in

  Typically $200–$1,600 to put right.

• Costly issue

  With engine running, switch the A/C on and observe the compressor clutch disc — it should engage cleanly and silently.

  See why

  Air Conditioning Compressor Electromagnetic Clutch Failure

  The i20 GB and BC generations are prone to early air conditioning compressor electromagnetic clutch failure. The clutch disc and bearing assembly fail, causing the compressor to either engage constantly or disengage entirely with loss of cabin cooling. The failure often presents as a squealing or grinding noise from the A/C compressor pulley and sudden loss of cooling. In severe cases the bearing seizes and throws the accessory belt. NZ and AU market vehicles are particularly affected due to summer heat loading on the A/C system.

  What you would notice

  • Squealing or grinding noise from the front of the engine when A/C is switched on
  • A/C system suddenly stops cooling
  • Burning smell from the engine bay with A/C engaged
  • A/C clutch cycling on and off rapidly
  • Shredded or thrown accessory belt in severe bearing-seizure cases

  Typically $700–$2,000 to put right.

• Costly issue

  On a manual, in a high gear at low revs, accelerate firmly and check the revs don't flare without the car speeding up (a slip test).

  See why

  Rapid manual clutch wear

  Manual PB i20s are reported to wear their clutches unusually quickly, with some owners needing replacements at surprisingly low mileage, particularly cars used a lot in stop-start city traffic. A slipping or heavy clutch is a clear sign the wear item is due. It's a normal repair rather than a design catastrophe, but factor a clutch job into an older, city-driven manual example.

  What you would notice

  • Revs rise without matching acceleration (slipping)
  • High or vague biting point
  • Burning smell in traffic
  • Juddery take-up

  Typically $800–$1,600 to put right.

Hyundai i20 service schedule

What falls due, and at what distance, for each generation of the Hyundai i20. These are the model’s intervals — the car’s own service book is the only thing that can tell you what has actually been done to it.

What these repairs cost on other cars

Some of the Hyundai i20’s documented faults are repairs other models share. Each page lists the documented NZ cost for every model it affects.

• Timing Chain Replacement Cost
• DSG and Dual-Clutch Gearbox Repair Cost

Other Hyundai models