DPF and EGR faults on the 1.7 CRDi
- Typically appears
- 90,000+ miles
- What to inspect
- Check for regen warnings and run it hot

A 2014 Hyundai i40 is now 12 years old, so an average example has covered around 162,000 miles. A mid-run car · most launch faults had been addressed by this point, and wear items are the main risk at this age. Check the state safety inspection and service history alongside the documented faults below, which are sorted by whether a 2014 car has usually reached the mileage where they appear.
Compiled & reviewed by the VehicleFaults Research Team
The 2014 Hyundai i40 is 12 years old, so an average example has covered roughly 162,000 miles. At that mileage 5 of the documented faults are already due, so check those first.
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Build the inspection planDocumented onset mileage is at or below the ~162k miles an average 2014 car has covered.
DPF and EGR faults on the 1.7 CRDi
Front bush and drop link wear
Clicking or clunking noise when turning the steering wheel side to side, caused by a worn flexible coupling inside the electronic power steering (EPS) motor.
Clutch judder when pulling away in first gear or a rattling noise at idle, indicating dual-mass flywheel (DMF) wear on manual 1.7 CRDi models.
Rhythmic ticking or metallic rattling from the engine bay on cold start due to timing chain stretch and tensioner wear on the 1.7 CRDi.
Age, electronics and build-related issues that are not mileage-driven.
Parking sensor and camera faults
Rear caliper seizing on low mileage cars
Touchscreen infotainment and sat-nav unit freezing, rebooting randomly, or displaying a blank screen due to software corruption or mainboard failure.
Turn this car's known weak points into a step-by-step viewing plan · what to inspect, what a bad result means and what to ask the seller.
Build my inspection planYes, values are low and fleet history is often complete.
DPF condition on short journey cars.
The estate is far easier to sell.
The 7-speed dual-clutch transmission, introduced during the 2015 facelift, offers smoother shifts but requires careful inspection. It is prone to clutch pack wear and mechatronic unit faults, often manifesting as juddering at low speeds or hesitation when pulling away. Manual gearboxes are generally more robust, provided the dual-mass flywheel is healthy.
The 1.7 CRDi engine utilises a steel timing chain rather than a rubber timing belt. While designed to last the lifetime of the vehicle, the chain and its tensioners can stretch or wear on higher-mileage examples, especially if the vehicle has missed scheduled oil changes. Always listen for cold-start rattling.
Hyundai supplied the i40 with a five-year, unlimited-mileage warranty from new. As production ceased in 2019, even the very last registered models have now fallen outside this manufacturer coverage. Dealers must ensure any aftermarket warranties offered cover known weak points like the dual-mass flywheel, steering coupling, and infotainment unit.
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