If you are considering buying a used Hyundai i20, there are several major reliability issues worth knowing about first. Our garage database tracks 5 known faults for this model, 3 of them rated high severity. Every one below is a repair bill a seller has good reason not to mention.
Are you about to buy a lemon?
Sellers rarely admit these faults outright. Our database tracks 13 specific phrases sellers use in adverts to soft-pedal these exact issues. Paste any Hyundai i20 advert and we will check it in seconds.
Premature clutch wear and judder, in many cases caused by an oil leak from the first motion shaft (input shaft) seal contaminating the clutch plate. Failures are documented well under 40,000 miles, and dealers frequently blame driving style rather than the leaking seal, leaving owners with a 500-900 pound clutch and seal bill. What Car? notes clutches wear remarkably rapidly on many i20s; 2012-2016 cars show the highest rate of reports
Rough guide
£500-900
Typical symptoms
juddering or shuddering when pulling away, especially uphill
clutch slip - revs rise without the car accelerating
burning smell after town driving
Affected vehicles
Engines:
1.2 / 1.4 Petrol manual (Kappa / Gamma)
Typical mileage:
15000-70000 miles
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The 7-speed dry dual-clutch automatic suffers low-speed judder, clutch overheating in stop-start traffic (transmission temperature warning, drive temporarily disabled), and mechatronic unit failures causing jerky shifts, harsh downshifts or complete loss of drive. UK gearbox specialists report replacement transmissions running to 3,500 pounds when the mechatronic and clutches are both gone. Hyundai extended warranty on some units but coverage is inconsistent
Rough guide
£1200-3500
Typical symptoms
shudder or judder pulling away and at crawling speeds
transmission temperature high warning in slow traffic
hesitation or flat spot between 1st and 2nd gear
harsh downshifts or refusal to engage gear
Affected vehicles
Engines:
1.0 T-GDI / 1.4 with 7-speed dry dual-clutch (7DCT)
Typical mileage:
30000-90000 miles
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Hyundai i20 Mk1 (2009-2015) (2009-2015) problems
Transmission/ClutchHigh severity💬 Owner reports
Oil leaks from the gearbox, specifically from the gearbox shaft seal and differential seal, are reported. This can lead to clutch contamination and premature failure.
Rough guide
£400-800
Typical symptoms
Oil stains under the car
Burning oil smell
Clutch judder or slip (if contaminated)
Low gearbox oil level
Affected vehicles
Engines:
Manual gearbox
Typical mileage:
10000-50000 miles
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SuspensionMedium severity💬 Owner reports
Rear brake calipers are prone to seizing, leading to premature brake wear, reduced fuel economy, and potential MOT failure. This was reported as an increasingly common repair.
Rough guide
£200-400 per side
Typical symptoms
Excessive brake dust on rear wheels
Car pulling to one side under braking
Reduced fuel economy
Burning smell from rear brakes
Affected vehicles
Engines:
All models
Typical mileage:
30000-70000 miles
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Fuel SystemHigh severity💬 Owner reports
Failure of multiple fuel injectors on the 1.4 CRDI engine, leading to diesel dumping into the sump and requiring expensive replacement.
Rough guide
£1400-2000
Typical symptoms
Sluggish starting
Engine cutting out when cold
Oil level rising on dipstick (due to diesel dilution)
Engine warning lights
Affected vehicles
Engines:
1.4 CRDI 90PS
Typical mileage:
100000-120000 miles
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Hyundai i20 service intervals: cambelt, chain and gearbox oil
An overdue cambelt is the most expensive thing a seller can fail to mention on a used i20. These are the figures UK specialists work to.
Timing chainChain
G3LA, 1.0 KAPPA
No fixed replacement interval
The Kappa 1.0 three-cylinder is chain driven: Hyundai describes the silent-type chain as maintenance free, so there is no scheduled replacement. A start-up rattle on oil-neglected cars means chain and tensioner wear. Note that at least one belt-or-chain database wrongly lists the early i10 G3LA as belt; parts catalogues and Hyundai's own engine description confirm a chain.
Always confirm against the vehicle handbook. Intervals vary by engine, and several manufacturers revised theirs after failures in service.
Repair costs are typical UK ranges, not quotes. Actual cost depends on condition and garage.Data last verified: September 2026
Where this Hyundai i20 fault data comes from
If you used to check the Honest John “Good & Bad” section before the site closed in 2026, this page is where that information now lives. We rebuilt the Hyundai i20 owner-report history from the archived Honest John dataset, added our own research, specialist and owner-club sources and DVSA recall data, and we keep it free. Each fault above is badged with its source. The same data feeds our free advert check, which reads a listing against every known fault for the exact engine and year.
Knowing what a Hyundai i20 goes wrong with is half of it. The rest is reading the advert and checking the car's history before you hand any money over.