Carsieve SEAT Leon 5F facelift ST Cupra 300, 300 PS, 6-speed dual-clutch, all-wheel drive (2017–2018)
- Power
- 300 PS (221 kW)
- Engine codes
- DNU
- Gearbox
- 6-speed dual-clutch
- Production years
- 2017–2018
- Running cost per month
- €533
- Fuel
- Petrol (98)
- Median price
- €20,500
- Reliability
- 3/5
- DIY
- 2/5
Research for this car
- Generation guide SEAT Leon III (2012-2020): known problems and buying guide
Check the airbag recall and the DQ200 gearbox first. Ask for proof of the EGR and DPF care on diesels.
- Engine guide VW 2.0 TSI (EA888 gen 3 and 4) petrol: problems, costs and what to check
A strong engine with known weak spots, so check the water pump, turbo and oil leaks before you buy.
Known issues for this car
| Issue | Affects | Typical km | Repair cost | Source |
|---|---|---|---|---|
| Driver airbag recall (69EC) | Leon built 2012 to 2017 | Not applicable (recall) | No confirmed price | Generation guide |
| EA211 coolant regulator housing leak | 1.4 and 1.5 TSI (EA211) | Not stated | No confirmed price | Generation guide |
| Water pump and thermostat housing leaks | Gen 3 and 3B; gen 4 with updated parts | 15,000-50,000 miles (about 24,000-80,000 km) | 750-1,250 GBP if not covered (UK, 2025) | Engine guide |
| Turbo and wastegate actuator failures | Gen 3, IS20 and IS38 turbos | Not stated | Not stated | Engine guide |
| Oil leaks at the cam area and rear seal | Gen 3 | Not stated | Not stated | Engine guide |
| PCV and oil vapour tank faults | Gen 3; hard-driven and track cars | Not stated | Not stated | Engine guide |
| Carbon on the intake valves | Gen 3 | Not stated | Not stated (about 1.5 extra hours of labour) | Engine guide |
Before you buy this car
From the generation guide
- Airbag recall (69EC). Give the VIN to a SEAT dealer. Bad result: the recall is still open. Built 15 June 2012 to 6 September 2017.
- Cooling pressure test (EA211 1.4 and 1.5 TSI). Ask a garage for a cooling system pressure test. Bad result: the pressure drops, or the coolant level keeps falling.
From the engine guide
- Coolant and water pump (scanner). Check the coolant level when cold. Look for a puddle under the front centre of the car. Read the stored faults for P00B7 (low coolant flow). Ask for an invoice showing the pump and housing were replaced as one assembly. Bad: low coolant, P00B7, or overheating. A missed leak can wreck the engine: 4,000-15,000 GBP for major damage (UK, 2025).
- Turbo and wastegate (test drive, scanner). Check that boost builds smoothly with no hesitation and no warning light. Ask for turbo or actuator invoices. Bad: boost loss, a warning light, or a turbo replaced with no paperwork.
- Oil in the intake (scanner). Ask whether the car was driven hard or on track. Check for a rough idle, a check-engine light, and oil in the intake. Bad: any of these, or a track history with no service record.
- Oil leaks at the back of the engine (no scanner). Look under the engine and where it meets the gearbox. Bad: oil at the rear seal. The fix needs the gearbox separated from the engine, so the job is large.
Running costs
| Operational | €233 |
|---|---|
| Workshop | €163 |
| Fixed costs (tax, insurance) | €137 |
| Total per month | €533 |
| New-car depreciation (not included) | €107 |
ADAC figures for 15,000 km a year over 60 months
Market
Listings on mobile.de in this generation with this fuel, gearbox and power.
- Listings
- 414
- 25th percentile
- €18,900
- Median price
- €20,500
- 75th percentile
- €22,500
- Median mileage
- 91,500 km
- Median first registration
- 2019
- Dealer share
- 45.4%
Check a listing
Prices by first registration
| First registration | Listings | Median price | Median mileage |
|---|---|---|---|
| 2024 | 2 | – | – |
| 2021 | 2 | – | – |
| 2020 | 114 | €22,000 | 81,500 km |
| 2019 | 105 | €20,500 | 93,000 km |
| 2018 | 125 | €19,900 | 97,400 km |
| 2017 | 66 | €18,500 | 109,315 km |
Medians only for years with at least 5 listings. Many cars are first registered after production ends, so years can run past the build years.
Price history
| Month | Listings | Median price | Middle half | Median mileage |
|---|---|---|---|---|
| Nov 2026 | 414 | €20,500 | €18,900 – €22,500 | 91,500 km |
| Oct 2026 | 414 | €20,500 | €18,900 – €22,500 | 91,500 km |
Median asking price at the last snapshot of each month.
ADAC versions
All 2 ADAC versions
| Version | Power | Production years | Running cost per month |
|---|---|---|---|
| Leon ST Cupra 300 4Drive DSG | 300 PS | 2017–2018 | €533 |
| Leon ST Cupra 300 Carbon Edition 4Drive DSG | 300 PS | 2018 | €533 |