Models · Mini
Mini Cooper S R56 buying guide
The second BMW Mini Cooper S, built from 2006 to 2013, with a turbocharged 1.6 in place of the earlier supercharged engine. Cars from 2010 onwards have the revised N18 engine, regarded as more refined and reliable than the early N14.
The versions
- 1.6 turbo four-cylinder (N14) from 2006 to 2010, 175PS, with overboost adding 20Nm under hard acceleration
- 1.6 turbo four-cylinder (N18) from 2010, 184hp
- Six-speed manual, or optional six-speed automatic
- Hatchback, with a factory John Cooper Works model and a John Cooper Works dealer kit also offered
What to check on a R56 Cooper S
3 model-specific things to look at when you view one. They're a starting point, not the full inspection.
Timing chain rattle from cold
What to look for: Ask for the engine not to be started before you arrive. Listen at the front of the engine during the first minute of a cold start for a brushing noise or rattle, and ask for paperwork showing a timing chain or tensioner replacement.
Why it matters: The timing chain tensioner is the known weak spot of these engines, and cars before 2011 are most at risk; the tensioner was revised in 2011. Low oil levels make it worse, so a car kept topped up to the maximum is a good sign. A chain and tensioner replacement with the later parts is the fix.
Oil leaks and oil level
What to look for: Check the dipstick, then look around the rocker cover, the sump, the turbo oil feed pipe and the crankshaft seals for wet oil. Look closely at the solenoids on the front of the cylinder head and the wiring next to them for oil.
Why it matters: Up to about a litre per 1,000 miles is described as normal, so the level needs checking between services. Leaking solenoid seals can let oil travel along the wiring into the engine control unit, which then needs replacing. Persistently low oil can also cause sludge in the Vanos system.
Hesitation, rough idle and misfires
What to look for: At idle, note any shaking or uneven running. On the drive, accelerate from low revs and feel for hesitation or a stutter, and look for an engine warning light.
Why it matters: The direct-injection engine builds up carbon on the backs of its inlet valves, which causes hesitation and poor idling; walnut-shell blasting cleans it off. Failing ignition coil packs give similar symptoms with reduced power and are a simpler fix.
Also in the full guide
- Water pump recall and coolant leaks
- The cold start, test drive and paperwork checks for the exact version you're viewing
The full guide to the R56 Cooper S
The CrankSight guide walks you round the car on your phone at the viewing, with every check for the exact version you're looking at: what to look for, where to find it, and what anything you find is likely to cost. As you go it builds an assessment of that car, and if you view more than one, it lines them up side by side.
£29 for the model, used on as many cars as you like, delivered within 72 hours or your money back.
Other generations
General points for the model, last checked October 2026. Every car is different, so treat this as a guide to what to look at, not a verdict on any car. CrankSight is independent and has no connection with Mini.