Hyundai Tucson 1.7 CRDi problems: diesel buying checks
Hyundai Tucson 1.7 CRDi problems - DPF, EGR valve, turbo and dual-mass flywheel faults - and how to check and price a diesel Tucson before you bid.
· 6 min read
The main Hyundai Tucson 1.7 CRDi problems are a clogged diesel particulate filter (DPF), a sticking or carboned-up EGR valve, a worn dual-mass flywheel and clutch on manual cars, and, less often, turbo or injector faults. The engine itself is basically durable and many reach well over 200,000 km. The risk depends on how the car was used: motorway fleet cars are good buys, short-trip town cars are not.
Where the 1.7 CRDi was used
The 1.7 CRDi four-cylinder diesel was fitted to the Hyundai ix35 and to the third-generation Tucson (TL) from its 2015 launch until the 2018 facelift. In the Tucson it came in two outputs:
| Version | Power | Gearbox | Drive |
|---|---|---|---|
| 1.7 CRDi | 115 PS | 6-speed manual | Front-wheel drive |
| 1.7 CRDi | 141 PS | 7-speed dual-clutch (7DCT) | Front-wheel drive |
At the 2018 facelift Hyundai replaced it with a quieter 1.6 CRDi of 115 or 136 PS. The 2.0 CRDi continued alongside it and gained a 48-volt mild-hybrid version. For an overview of all generations, see our Hyundai Tucson problems guide.
Hyundai Tucson 1.7 CRDi problems: is the engine reliable?
The 1.7 CRDi is reliable if it has done enough long journeys and has been serviced on time. Its weak points are the emissions components that every modern diesel has, not the core engine. Problems start when a car spends its life on short trips, because the DPF never gets hot enough to regenerate and soot builds up in the EGR system.
Fleet cars with high motorway mileage are often in better mechanical health than low-mileage town cars. Read the mileage together with the type of use.
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Request accessDPF problems: how to check the DPF on a Tucson
DPF clogging is the most frequent 1.7 CRDi fault on cars used in town. Symptoms are a DPF warning light, the engine fan running after switch-off (a regeneration in progress), loss of power and limp mode.
How to check it:
- Warning lights. Switch on the ignition and confirm all lights go out after start-up, including the DPF and engine lights.
- Diagnostics. Read the engine control unit for DPF faults and ask for the soot load and differential pressure readings.
- Regeneration history. Many forced regenerations in a short period point to a car used mainly for short trips.
- Test drive. Drive at least 20 minutes, including a steady motorway stretch. A healthy car pulls cleanly without smoke.
- Oil level. Rising oil level and a smell of diesel can mean fuel dilution from failed regenerations.
Specialists quote a professional DPF clean in the low hundreds of euros and a replacement filter at around one to two thousand euros, depending on country and parts. Put the realistic figure into your bid.
Hyundai Tucson EGR valve problems
EGR valve problems are the second common fault. Soot and oil vapour build up in the valve and the intake, causing rough idle, hesitation, poor fuel economy, black smoke and an engine warning light, often with an EGR or "air flow" fault code.
Cleaning the valve is often enough on a car with moderate deposits; badly coked valves are replaced. In both cases, fix the cause as well: a car that keeps doing short trips will clog again. When you retail a diesel Tucson, it is worth explaining to the buyer that it needs regular longer drives.
Dual-mass flywheel, clutch and turbo
High-mileage manual cars often need a clutch and dual-mass flywheel together. Listen for a rattle at idle that stops when you press the clutch, judder when pulling away and a high biting point.
The 141 PS version uses the 7-speed dual-clutch gearbox, which has its own judder issues at low speed; see our Tucson gearbox problems guide.
Turbo problems are less common. Check for whistling, blue smoke, oil in the intercooler hoses and a loss of boost. Most turbo failures follow poor oil change history, so the service book matters.
Which is the best Hyundai Tucson diesel engine?
For stock, the 2.0 CRDi with the six-speed torque-converter automatic is the most robust Tucson diesel of this period, especially with four-wheel drive for buyers who tow. It avoids both the dual-clutch and the 1.7's sensitivity to short trips.
The 1.7 CRDi manual is a good budget choice if it has motorway history. The later 1.6 CRDi (2018–2020) is quieter and cleaner; later versions use SCR with AdBlue, so check for AdBlue warnings, as explained in our guide to AdBlue faults on used diesels.
Are diesel Tucsons still in demand?
Diesel Tucsons still sell, but their market is narrowing. They are popular in Central and Eastern Europe, in rural areas and with buyers who tow, while demand in cities with low-emission zones is falling.
According to listings tracked by MyCarDealer across 18 European countries in October 2026:
| Tucson | Listings | Median asking price | Median mileage |
|---|---|---|---|
| Diesel, 2015–2018 | 929 | €12,500 | 149,491 km |
| Diesel, 2019–2020 | 385 | €15,900 | 128,000 km |
| Diesel, 2021–2024 | 356 | €18,991 | 92,684 km |
| Petrol, 2016–2020 | 788 | €14,950 | 103,069 km |
For 2015–2018 diesels, Czechia had 205 listings with a median of €11,995, Italy 181 at €12,500, Germany 59 at €12,900, Belgium 57 at €12,000 and Norway 41 at €14,927. Far fewer diesel Tucsons were listed in Germany than in Czechia or Italy, which suggests where most of the remaining demand sits.
Our article on used diesel demand explains how to judge diesel stock by market.
How to price emissions repairs into the bid
Start from the retail price in the market where you will sell, then work backwards:
- Target retail price for that market and mileage.
- Minus your margin and VAT under the margin scheme or standard VAT.
- Minus transport, registration and reconditioning.
- Minus the expected repair: DPF clean or replacement, EGR clean or valve, clutch and flywheel if the test shows wear.
The result is your maximum bid. If the auction report shows DPF or EGR codes, assume the higher repair cost. A free valuation gives you the local market price and margin for a specific Tucson in seconds.
Frequently asked questions
Is the Hyundai Tucson 1.7 diesel a good car?
Yes, if it has been used for longer journeys and serviced on time. The core engine is durable; the risks are DPF and EGR clogging on cars used for short trips and a worn clutch and dual-mass flywheel at high mileage.
Is the Hyundai 1.7 CRDi engine reliable?
The engine itself is considered durable, with many examples passing 200,000 km. Its problems are mostly in the emissions system and are preventable with regular motorway driving and on-time oil changes.
What year to stay away from Hyundai Tucson?
There is no single bad year, but be careful with 2015–2018 diesels used only in town and with early dual-clutch cars that judder. Any Tucson without service history or with open recall work needs a lower price.
What EGR problems does the Tucson diesel have?
Soot and oil vapour clog the EGR valve, causing rough idle, hesitation, smoke and engine warning lights. Cleaning often fixes it, but badly coked valves need replacing, and the car needs regular longer drives afterwards.
Which is the best Hyundai Tucson diesel engine?
The 2.0 CRDi with the six-speed automatic is the most robust choice of the TL generation, particularly for towing. The 1.7 CRDi manual is a good budget car with motorway history, and the later 1.6 CRDi is quieter and cleaner.