Free used car buyer guide / VF / 2011-2019
Hyundai i40 common problems and best years
By BYBA Research - how we score cars
Updated 2026-06-12
BYBA Buy Score
6.2/10
2 walk-away risks, 4 serious faults, 2 minor faults documented for this generation, weighted by severity and repair cost. Biggest factor: diesel dpf blockage and regeneration failure. Score methodology.
The i40 is a useful long-distance saloon/estate, but most used examples are diesel and old enough for emissions, clutch, steering and corrosion costs to dominate. The best buy is a late 1.7 CRDi with genuine motorway use, clean DPF/EGR data, quiet dual-mass flywheel and no steering or electronic parking brake faults. Petrol cars are simpler but rarer and should still be checked for oil, chain noise and catalyst/misfire history.
Faults covered
8
Highest risk
Diesel DPF blockage and
Best years
2015-2019
Best buys
- 2015-2019 facelift 1.7 CRDi manual/auto with clean DPF data and motorway history.
- Petrol only if service history is complete and price reflects rarity.
- Estate with dry boot, working parking brake and no rear suspension corrosion.
Inspect hard
- 2011-2014 early cars for steering coupler, EPB and suspension wear.
- Diesels for injector, EGR, turbo and DPF faults.
- Manuals for clutch/DMF rattle.
Avoid
- DPF light, limp mode, deleted emissions hardware or AdBlue/SCR tampering where fitted.
- EPB stuck, brake warning or severe rear corrosion.
- DMF rattle plus poor diesel running.
Next checks
Before you contact the seller
Check the car's history first. Then bring the right tools if it still looks worth viewing.
Primary next step
Check history, title, and recall status
The faults above matter more if the car also has accident history, finance flags, missing service records, or open safety recalls.
Viewing kit
Bring the right tools
Four cheap tools catch most of the faults on this page at a Hyundai i40 viewing.
Printable workflow
Take the inspection pack
The PDF is the ordered checklist for the viewing: documents, walk-around, test drive, and scan.
Open PDF optionSome links here are partner links. If you buy through one, BYBA earns a commission. The price you pay does not change. How we make money.
Engines and trims
Which Hyundai i40 should you buy?
On most used cars, the engine and trim choice changes the risk more than the mileage does. Narrow this down before you start viewing cars.
1.7 CRDi U2 diesel
2011-2019
MAIN BUY ONLY WITH DIESEL USE CASE
Can cover high mileage, but DPF/EGR/injector/DMF costs make short-trip cars poor buys.
2.0 GDI petrol
2011-2019 depending market
SIMPLE BUT RARE
Avoids diesel emissions costs but needs oil, chain and catalyst checks.
Automatic / DCT by market
2011-2019
INSPECT SHIFT QUALITY
Gearbox type varies by market/year; low-speed behaviour and service evidence matter.
Year notes
Year-by-year buyer advice
Use this to narrow the search before you spend time travelling to view a car.
2011
VF i40 launched in Europe as estate/saloon.
Buyer: Early cars need steering, EPB and diesel checks.
Owner: Keep recall and service records.
2012
Wider diesel supply.
Buyer: Usage profile matters more than mileage.
Owner: Avoid repeated short-trip diesel use.
2013
Mature early cars.
Buyer: Inspect rear suspension, brakes and clutch.
Owner: Fix brake/EPB faults before MOT.
2014
Final pre-facelift years.
Buyer: Buy only with clean emissions scan.
Owner: Document injector/EGR work.
2015
Facelift with revised styling/equipment.
Buyer: Better target if DPF and DMF are clean.
Owner: Keep software/update records.
2016
Late facelift range.
Buyer: Check automatic/DCT behaviour by exact car.
Owner: Service gearbox as usage demands.
2017
Ageing platform, fleet-mileage cars common.
Buyer: Judge by maintenance, not odometer alone.
Owner: Preventive brake/suspension work helps resale.
2018
Final years in many markets.
Buyer: Strong value when clean and not ex-neglect fleet stock.
Owner: Keep MOT/advisory history clean.
2019
End of i40 availability in several markets.
Buyer: Verify parts/support and exact engine/gearbox.
Owner: Late i40s sell on condition and paperwork.
Common problems
Faults to check before buying
What fails, what it looks like, what it costs, and the quick checks you can do at the viewing - ranked by how badly each one can hurt you.
Fault 1
Diesel DPF blockage and regeneration failure
Affects
1.7 CRDi short-trip cars.
Symptoms
DPF light, limp mode, high idle/fan, failed emissions.
Typical repair cost
GBP 150-400 regen/sensor; GBP 800-1,800 DPF.
Codes / scan clues
P2002, DPF pressure/temperature sensor codes.
Root cause: Low exhaust temperature and soot accumulation.
Quick check
- Ask weekly mileage and trip length.
- Scan soot load and last regen.
- Check MOT emissions history.
- Reject deleted DPF.
Fault 2
EGR valve/cooler, injector and turbo boost faults
Affects
1.7 CRDi.
Symptoms
Smoke, limp mode, rough cold start, poor boost, diesel smell.
Typical repair cost
GBP 300-900 EGR/injector; GBP 900-1,800 turbo.
Codes / scan clues
P0401, P0299, fuel pressure/injector correction codes.
Root cause: Soot deposits, injector wear and VGT/turbo actuator sticking.
Quick check
- Cold start and smoke check.
- Scan injector corrections and boost.
- Road test full load uphill.
- Check fuel filter and EGR invoices.
Fault 3
Dual-mass flywheel and clutch wear
Affects
Manual 1.7 CRDi and high-mileage cars.
Symptoms
Idle rattle, vibration, clutch slip, difficult gear selection.
Typical repair cost
GBP 800-1,500 clutch/DMF; GBP 2,000+ if gearbox damage.
Codes / scan clues
Usually none.
Root cause: Diesel torque, urban use and wear.
Quick check
- Listen clutch up/down at idle.
- Test high-gear acceleration.
- Feel for vibration through pedal.
- Ask if DMF was replaced with clutch.
Fault 4
Electronic parking brake motor/module faults
Affects
i40 estate/saloon with EPB, especially older wet/salt cars.
Symptoms
EPB stuck, warning light, rear brakes dragging, failed MOT.
Typical repair cost
GBP 250-700 actuator/caliper; GBP 800-1,500 module/wiring.
Codes / scan clues
EPB module and motor circuit codes.
Root cause: Motor/caliper corrosion, weak battery or EPB module faults.
Quick check
- Apply/release EPB several times.
- Scan brake module.
- Inspect rear calipers and wiring.
- Check MOT brake imbalance/advisories.
Fault 5
MDPS steering coupler knock or EPS warning
Affects
2011-2019 i40.
Symptoms
Column knock, vague steering, EPS light, clunk over bumps.
Typical repair cost
GBP 150-400 coupler; GBP 700-1,500 column/EPS.
Codes / scan clues
Steering torque/angle sensor codes.
Root cause: Flexible coupler wear or EPS sensor/column fault.
Quick check
- Rock wheel left/right at idle.
- Drive over small bumps.
- Scan EPS module.
- Check steering alignment after tyre wear.
Fault 6
Rear suspension, brake line and subframe corrosion
Affects
UK/Nordic/salt-climate i40.
Symptoms
MOT corrosion advisories, clunks, brake pipe corrosion, rear alignment issues.
Typical repair cost
GBP 400-1,200 brakes/suspension; GBP 2,000+ severe corrosion.
Codes / scan clues
ABS sensor codes possible.
Root cause: Road salt, age and estate rear load.
Quick check
- Read MOT history.
- Inspect rear subframe/arms/brake lines on lift.
- Check tyre wear and alignment.
- Beware fresh underseal over rust.
Fault 7
Airbag/seatbelt/brake recall status
Affects
VIN-specific i40 recalls by market.
Symptoms
Open recall, SRS/ABS light, missing dealer paperwork.
Typical repair cost
GBP/EUR 0 recall.
Codes / scan clues
SRS/ABS module faults.
Root cause: Production-specific safety component defects.
Quick check
- Run Hyundai recall check.
- Use government recall database.
- Confirm warning lights prove out.
- Keep dealer invoice.
Fault 8
Infotainment, camera, tailgate wiring and damp boot faults
Affects
Higher-spec i40 estate/saloon.
Symptoms
Camera failure, Bluetooth faults, boot damp, tailgate light/lock faults.
Typical repair cost
GBP 100-400 wiring/software; GBP 500-1,500 head unit/module.
Codes / scan clues
Body/infotainment low-voltage communication codes.
Root cause: Ageing wiring, weak battery, water ingress or module failure.
Quick check
- Test camera, radio, Bluetooth and tailgate.
- Lift boot floor and side trim for damp.
- Scan body modules.
- Check battery age/charging voltage.
Inspection pack
Printable checklist for the viewing
The free page helps you decide whether the car is worth seeing. The paid guide is the ordered, printable checklist you use at the car.
- VIN recall check for Hyundai i40 2011-2019.
- Service invoices matching the engine/drivetrain and mileage, not only stamped history.
- Inspect tyres, leaks, accident repair and water entry before the test drive.
- Look specifically for evidence related to Diesel DPF blockage and regeneration failure.
- Check every warning light, infotainment function, climate mode, camera/sensor warning and battery condition before moving.
- Cold start, full warm-up, low-speed manoeuvres and motorway-speed pull for Hyundai i40.
- Recheck for smells, warning lights, harsh shifts, vibration or coolant/oil leaks after the drive.
- Scan engine, transmission, ABS/body and driver-assist modules where fitted.
- Treat cleared codes or incomplete readiness monitors as negotiation or walk-away evidence.
Bottom line
Buy: 2015-2019 facelift 1.7 CRDi manual/auto with clean DPF data and motorway history. Petrol only if service history is complete and price reflects rarity.
Avoid: DPF light, limp mode, deleted emissions hardware or AdBlue/SCR tampering where fitted. EPB stuck, brake warning or severe rear corrosion.
Quick answers
Hyundai i40 buyer questions
The short versions of what this page answers in full.
What are the most common Hyundai i40 2011-2019 problems?
The highest-impact documented faults are: Diesel DPF blockage and regeneration failure; EGR valve/cooler, injector and turbo boost faults; Dual-mass flywheel and clutch wear. This guide covers 8 faults in total, each with symptoms, typical repair costs, and checks you can do at a viewing.
Which Hyundai i40 years are the best to buy?
2015-2019 stand out in this generation. 2015-2019 facelift 1.7 CRDi manual/auto with clean DPF data and motorway history. Petrol only if service history is complete and price reflects rarity.
Which Hyundai i40 should I avoid?
DPF light, limp mode, deleted emissions hardware or AdBlue/SCR tampering where fitted. EPB stuck, brake warning or severe rear corrosion.
Is the Hyundai i40 2011-2019 a reliable used buy?
BYBA scores it 6.2/10 (buy with checks). 2 walk-away risks, 4 serious faults, 2 minor faults documented for this generation, weighted by severity and repair cost. Biggest factor: diesel dpf blockage and regeneration failure.
Get updates when this guide changes
Recalls get added, repair costs shift, and new fault patterns show up in the data. Leave an email and we'll tell you when the Hyundai i40 guide gets a meaningful revision. Nothing else, no selling your address.