Thinking about buying a used Hyundai i40 (2011–2019) in New Zealand? We've documented 5 known faults for this model spanning electrical, transmission, and engine. Each researched and verified before it's published. The most serious issues here are rated critical. Two are set out in full below — the rest, with the symptoms, repair costs and checks for each, are free with an account.
5
Documented faults
Critical
Most serious
$600–$2,800
Typical repair
3
Systems covered
Known Hyundai i40 faults
Every fault below is documented specifically for this model — researched and verified before it’s published.
01ABS module brake-fluid leak / engine-bay fire risk (recall REC-006041)
CriticalOccasionalElectrical $0–$2,500 to fix
Subject to Australian safety recall REC-006041 (Hyundai Motor Company; also covers Veloster, ix35, Accent, Santa Fe, iMax/iLoad). A manufacturing defect can let brake fluid leak into the ABS control (HECU) module, causing an electrical short that can start an engine-compartment fire while parked or driving. The remedy is a free multi-fuse installation at a Hyundai dealer (the same defect family as overseas 'ABS Fuse / Recall 251' campaigns). No stated expiry - the free recall remedy remains available; owners are advised to park affected cars away from structures until fixed.
Symptoms to notice
Burning smell or smoke from the engine bay
ABS / brake warning lights illuminated
Electrical faults or blown fuses around the ABS unit
In worst cases, an engine-compartment fire
What to check
Confirm the recall has been completed: run the VIN through Hyundai's recall lookup or Product Safety Recalls Australia (REC-006041) and ask the seller for proof the free multi-fuse remedy was fitted. Inspect the ABS module and surrounding harness in the engine bay for fluid staining, corrosion or heat damage. Check ABS/brake warning lights extinguish after start-up.
Where to look: ABS control (HECU) module in the engine compartment
Ask the seller
“Has safety recall REC-006041 (ABS multi-fuse) been carried out?”
“Can you show the dealer paperwork confirming the recall fix?”
“Have there ever been ABS or brake warning lights?”
“Any electrical smells or smoke from the engine bay?”
022.0 GDI intake valve carbon build-up
MajorCommonEngine $400–$1,200 to fix
The 2.0L Nu GDI (gasoline direct-injection) petrol sprays fuel straight into the cylinder, so no fuel washes over the back of the intake valves. Oil vapour and blow-by from the crankcase ventilation bakes onto the valves and ports, restricting airflow. Deposits accumulate gradually and typically become noticeable from around 80,000 to 150,000 km, sooner on short-trip city cars. No recall covers this; it is an inherent GDI design characteristic and a maintenance item.
Symptoms to notice
Rough or lumpy idle, especially when cold
Cold-start misfire or hesitation (P0300-P0304 codes)
Gradual loss of power and throttle response
Reduced fuel economy over time
What to check
Ask for a recent scan report and check for stored/pending misfire codes (P0300-P0304). On a test drive feel for hesitation and rough idle from cold. Check the service history for oil-change intervals - stretched intervals accelerate deposit build-up. If a workshop inspection is possible: If accessible, borescope the intake valves through the intake manifold, or ask whether an intake/walnut-blast decarbon has ever been done.
Where to look: Intake valves and intake ports, cylinder head (petrol 2.0 GDI)
Ask the seller
“Has the intake ever been decarbonised or walnut-blasted?”
“Does it idle smoothly from a cold start?”
“Is it mostly short city trips or longer highway running?”
“Do you have the full oil-change service history?”
TransmissionMajor
EngineMajor
EngineMajor
3 more documented faults on the Hyundai i40
Symptoms, what to check, where to look and what to ask the seller — for every fault above. Free with an account, no card needed. One account covers one vehicle, so make it the car you’re actually looking at.
This page covers the model. Enter the plate of the actual car you’re looking at and see its year, engine, safety rating and register flags — free, no account needed.
Like any used car, it depends on the specific example and its service history. Across the 5 documented faults for the Hyundai i40, the recurring problem areas are electrical, transmission, and engine. A Hyundai i40 with a full service history and no signs of the issues listed on this page can be a sound buy but each one needs to be checked individually before you commit.
What are the most common problems with a used Hyundai i40?
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We've catalogued 5 known faults for the Hyundai i40, covering electrical, transmission, and engine. Two are written out in full on this page. The rest — with the symptoms to notice, what to inspect, and typical repair costs for each — are free once you create an account.
How much do repairs cost on a Hyundai i40?
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Most single repairs on the Hyundai i40 fall between $600–$2,800 at NZ independent-workshop rates. Some of the 5 documented faults cost less and a few cost considerably more, and no one car needs them all. Knowing which ones to look for before you view is what lets you negotiate the price down or walk away.
Should I get a pre-purchase inspection on a Hyundai i40?
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Yes. A Hyundai i40 inspection focused on its known weak points is the single best way to avoid an expensive mistake. KickTyres gives you a guided, model-specific inspection plus a market valuation and negotiation figure for $17.90 far less than the cost of missing one of the faults on this page.