Cooper / Cooper S (1.6 EP6)
2006–2013 · petrol · 1598cc · 175hp
Engine codes: EP6, N12, N14, N18
Reliability, common problems and owner reviews for the Mini Hatch Cooper / Cooper S (1.6 EP6). Check this before you buy used.
The R56's 1.6 petrols are the BMW/PSA 'Prince' engine (EP6, the same unit as the Peugeot 308/207 THP and Citroën C4) — fun to drive but the R56's Achilles heel: timing-chain stretch and rattle (the defining failure, can destroy the engine if ignored), direct-injection carbon, high-pressure-fuel-pump and (on turbo S/JCW) turbo and the infamous N14 carbon/death-rattle. The naturally-aspirated Cooper is a little less stressed than the supercharged-feel turbo S. Buy only with full chain history and budget for it — an unknown R56 1.6 is one of the riskier used buys in this catalogue.
Same engine, other cars
This is the same physical engine (EP6) sold under different names across brands. Reliability is broadly shared — cross-check these:
- Peugeot 3008— 1.6 THP / VTi (EP6, Prince)156hp
- Peugeot 5008— 1.6 THP (EP6)156hp
- Citroën C4— 1.6 VTi / THP (EP6, Prince)150hp
- Citroën C3— 1.6 VTi / THP (EP6, Prince)120hp
- Citroën Berlingo— 1.6 VTi (EP6)120hp
- Peugeot 508— 1.6 THP (EP6CDT)156hp
- Peugeot 207— 1.6 VTi / THP (EP6, Prince)150hp
- Peugeot 308— 1.6 THP (EP6DT / EP6CDT, turbo)150hp
- Peugeot 308— 1.6 VTi (EP6, naturally aspirated)120hp
- Citroën C4 Picasso— 1.6 THP / VTi (EP6)156hp
Known Issues
Chain stretches → cold-start 'death rattle' → can skip and wreck the engine. The defining R56 fault.
Fix / Workaround: Replace chain kit at first rattle; strict oil. Walk away from a rattling car.
Repair cost: €700–€2200
Typically appears after: 70,000 km
DI valve carbon; high-pressure pump and (turbo S) turbo wear.
Fix / Workaround: Walnut-blast intake; replace HPFP/turbo as needed.
Repair cost: €300–€1800
Typically appears after: 90,000 km
Year Cutoffs
Mileage Thresholds
After 120,000 km: Chain attention overdue — verify it's been done.
Pre-Purchase Checklist
- ☐Cold-start rattle = walk away
- ☐Same EP6 as Peugeot/Citroën THP
- ☐Full chain history essential
Frequently asked questions
Is the Mini Hatch Cooper / Cooper S (1.6 EP6) reliable?
Problematic — The R56's 1.6 petrols are the BMW/PSA 'Prince' engine (EP6, the same unit as the Peugeot 308/207 THP and Citroën C4) — fun to drive but the R56's Achilles heel: timing-chain stretch and rattle (the defining failure, can destroy the engine if ignored), direct-injection carbon, high-pressure-fuel-pump and (on turbo S/JCW) turbo and the infamous N14 carbon/death-rattle. The naturally-aspirated Cooper is a little less stressed than the supercharged-feel turbo S. Buy only with full chain history and budget for it — an unknown R56 1.6 is one of the riskier used buys in this catalogue.
What are the common problems and reviews for the Mini Hatch Cooper / Cooper S (1.6 EP6)?
The most commonly reported problems: Timing chain stretch/rattle (EP6), Carbon / HPFP / turbo.
Is a used Mini Hatch Cooper / Cooper S (1.6 EP6) worth buying?
Known design issues and recurring faults that were never fully resolved. Buy only with eyes open.