The 1.0 MPI (EA211: CHYA / CWVA) engine was fitted to the SEAT Mii (2011–2021). In the EU that is 89.5 % of all new cars of this generation.
Versions: 1.0 60 hp, 1.0 75 hp, 1.0, 1.0 68 hp.
The most expensive known risk is coolant pump / thermostat module leak (plastic housing): it usually appears at 60,000–150,000 km and costs €250–600 to fix.
Engine faults ✓ Checked against sources (10/2026)
✓ The faults of this engine were checked against sources (10/2026). Each item has at least two independent sources or an official recall or parts-maker technical note.
Coolant pump / thermostat module leak (plastic housing)
usually 60,000–150,000 km · Medium risk
Signs: Coolant level slowly drops, pink crust or damp at the gearbox end of the cylinder head, sweet smell after driving
Fix: Pressure-test the system, replace the pump and thermostat module together with its small drive belt, then bleed the system using diagnostics
€250–600
1.0 MPI: camshaft timing oil control valve sticks (coked oil passages)
usually 60,000–160,000 km · Medium risk
model years 2011–2016 onlyengine codes: CHYA, CHYB
Signs: Poor pull and uneven running, engine light with codes such as P0010, P0016 or P0341
Fix: Clean or replace the camshaft control oil valve, check the oil bores in the cylinder head for dirt, and keep to regular oil changes
€100–300
Recall: camshaft adjuster bolts loosen (1.6 MPI built 2014–2015)
usually 0–200,000 km · High risk
model years 2014–2015 onlyengine codes: CWVA, CWVB
Signs: Usually no warning; then oil leak at the timing end, rough running or camshaft timing faults; a broken adjuster pulley can wreck the timing drive
Fix: Check by VIN whether recall 15H4 (Škoda) or the matching VW / SEAT action was done; the adjuster is replaced free of charge
free / recall
Gearboxes
Manual
Clutch wear
usually 120,000–200,000 km · Medium risk
Signs: Slipping, high bite point
Fix: Replace clutch kit
€500–900
ASG (automated manual)
Clutch actuator / hydraulic unit
usually 80,000–160,000 km · High risk
Signs: Won't select a gear, 'gearbox fault', jerky shifts
Fix: Repair or replace the actuator; clutch re-learn
€500–1,500
Clutch wear (automated)
usually 80,000–150,000 km · Medium risk
Signs: Slipping, harsh engagement
Fix: Replace clutch + re-learn
€500–1,000
Service plan for this engine
Typical routine maintenance cost for 100,000 km: €2,200–4,950. Sum of the services and wear parts in the plan above (about 15,000 km a year, independent workshop), without faults.
Intervals and typical prices for the SEAT Mii with the 1.0 MPI (EA211: CHYA / CWVA) engine. The app gives the exact plan for your mileage.
Versions of this engine in the SEAT Mii
Source: European Environment Agency (EEA), monitoring of CO₂ emissions from new passenger cars, CC BY 4.0. CO₂ and fuel use are official type-approval values (WLTP from 2021), not real-world consumption.
Official recalls
Recalls the manufacturer published in the United Kingdom for this model (4). The same recalls usually apply across Europe. Ask an authorised dealer to check by VIN whether your car is affected and whether the work has been done.
- Other Towing eye may be defetcive27/12/2017 · R/2018/005
- Doors / locks / lids Manual child lock may disengage without warning05/08/2016 · R/2016/180
- Airbag Driver's airbag may not deploy correctly07/09/2015 · R/2015/175
- Airbag Side airbag diagnostic function disabled03/05/2013 · R/2013/058
Common questions
What are the biggest risks of the SEAT Mii with the 1.0 MPI (EA211: CHYA / CWVA) engine?
The faults with the highest risk: coolant pump / thermostat module leak (plastic housing) (60,000–150,000 km, €250–600).
Does the SEAT Mii 1.0 MPI (EA211: CHYA / CWVA) have a timing belt or a chain?
Belt · 240,000 km / every 120 mo.
Which oil does the SEAT Mii 1.0 MPI (EA211: CHYA / CWVA) need?
5W-30 / 0W-20 · VW 504.00 / 508.00 · ~3.6–4.0 L · every 15,000 km.
Sources and notes
Main sources for the faults of this engine:
Faults, intervals and prices are indicative and collected from public sources and owner experience; always rely on the service book and a qualified workshop. Test statistics: DVSA – Anonymised MOT tests and results, Open Government Licence v3.0. Dutch tests: RDW Open Data (CC0). Engine versions: EEA, monitoring of CO₂ emissions from new passenger cars (CC BY 4.0, DG CLIMA). Owner complaints: NHTSA ODI (public domain). Recalls: DVSA Vehicle Safety Branch Recalls Database, OGL v3.0. Brand and model names are trademarks of their owners and are used only to describe the vehicles. How we check the data →
Updated 29/10/2026