Car Model Guide/ MINI/ Hatch/ R56/ Cooper

Cooper N12

The naturally aspirated Prince engine from the BMW and PSA venture, port-injected and reasonably willing. It shares the family's timing chain weakness, so the rattle test at a cold start applies here as much as it does to the turbo.

Overview

The Cooper is the N12 petrol version of the MINI Hatch hatchback (R56), sold 2006–2010 with 120 PS and manual or automatic. High risk at level 4. Timing chain stretch on the Prince engine costs a large share of what a pre-facelift car is worth. 2 failure modes are recorded against its engine, gearbox, chassis and shared components. Prices on this page are illustrative placeholders rather than a sourced market sample. See the methodology for how the bands are derived.

MINI Hatch hatchback (R56) · photo Mini Cooper (R56) – Frontansicht, 28. Mai 2011, Düsseldorf by M 93 · CC BY-SA 3.0 de · Wikimedia Commons

Power120 PS

Torque160 Nm

Years2006–2010

Fuelpetrol

DriveFWD

EnginesN12

Biggest risks

Ranked by probability × repair cost. 2 recorded in total.

41Fragile

Timing chain stretch and tensioner wear€1,100–€1,900checkable
Electric power steering pump failure€450–€1,100checkable

Risk level −33 · Likely spend vs price −26 · all issues →

System by system9 systems reviewed · 7 with no recurring fault reported

Engine⚠ attentionTiming chain stretch and tensioner wear, €1,100–€1,900.

Fuel system✓ clearNo recurring fault reported for this system on this engine.

Intake & air✓ clearNo recurring fault reported for this system on this engine.

Cooling✓ clearNo recurring fault reported for this system on this engine.

Emissions✓ clearNo recurring fault reported for this system on this engine.

Transmission✓ clearNo recurring fault reported for this system on this engine.

Electrics✓ clearNo recurring fault reported for this system on this engine.

Suspension & brakeswatchElectric power steering pump failure, €450–€1,100.

Body & interior✓ clearNo recurring fault reported for this system on this engine.

Pre-facelift or facelift, this engine spans both

The same badge either side of the changeover. Bands are split at the facelift year from the generation record.

Phase	Years	Low	Average	High	Good buy	What differs
pre Pre-facelift	2006–2009	€3,200	€5,200	€8,000	€4,200	The specification the car launched with.
LCI Facelift (LCI)	2010	€3,500	€5,650	€8,700	€4,600	N16 and N18 engines replaced N12 and N14; Revised nose and lights; Improved interior trim

Known issues, ranked by expected cost

Faults recorded against this engine, its components and its chassis, ranked by likelihood × repair cost. Costs are indicative ranges with a stated labour basis.

Timing chain stretch and tensioner wearPrince timing chain€1,100–€1,900

A rattle from the front of the engine for the first seconds after a cold start, and later a rough idle or a fault code for camshaft timing. The chain and its tensioner on the BMW and PSA Prince family stretch with age and heat cycles rather than with distance. Once the chain is slack it can skip a tooth, and that damages valves.

Check: Start the car from stone cold and listen carefully through the first five seconds. Any rattle means the work is due, so ask for a receipt rather than accepting an assurance.

EnginecommonDetectable at viewingevidence: documented80–160k km

Electric power steering pump failureR56 body€450–€1,100

Steering that goes heavy without warning, a warning light, and a cooling fan for the pump that runs constantly. The pump sits low at the front of the car where it takes water and road salt, and its electronics fail. A blocked or dead cooling fan brings the failure forward, which is why the fan is worth checking on its own.

Check: Turn the wheel lock to lock while stationary and feel for any heaviness or hesitation. Listen for the pump fan running at idle, since a fan that never stops is a pump working too hard.

SuspensioncommonDetectable at viewingevidence: documented90–180k km

Ranked by probability × repair cost, not by how loudly a failure is discussed. Inherited from the engine, gearbox, chassis and shared components, each written once.

Pre-purchase inspection

The same issue records, reordered into the sequence you can actually check them in: cold start, static, drive, paperwork.

2 checks · saved in this browser ·

1Cold startYou get one. If the engine is warm when you arrive, come back another day.

Timing chain stretch and tensioner wearStart the car from stone cold and listen carefully through the first five seconds. Any rattle means the work is due, so ask for a receipt rather than accepting an assurance.

2Static checksEngine off, ideally on a lift.

Electric power steering pump failureTurn the wheel lock to lock while stationary and feel for any heaviness or hesitation. Listen for the pump fan running at idle, since a fan that never stops is a pump working too hard.

Mileage and servicing

What the odometer does and doesn't tell you here, plus the service items whose neglect causes the expensive failures above.

Mileage tells you very little here, because the chain wears on time and heat cycles as much as on distance. A 90,000 km town car can need the work while a 180,000 km motorway car doesn't.

Service item	Interval	Cost
Engine oil and filter Chain and tensioner wear accelerate on tired oil.	10,000–15,000 km	€110–170
Timing chain and tensioner A stretched chain can jump and damage the engine.	on symptoms, commonly 100,000–160,000 km	€1,100–1,900

What to pay

What this engine sells for, against the median of every engine in the chassis. All figures are illustrative placeholders. See the basis chips.

median €5.5k

€3.2k€4.2k€8.7k

Cheapfind the reasonGood buyif it checks outFairnormal moneyOverpricedneeds justifying

Asking price (€)Mileage (km)

Enter an asking price to get a verdict against this variant's band: cheap, fair, good buy or overpriced.

United States vs Europe

1 EUR = 1.08 USD · 2026-07

🇪🇺 Europe · EUR€4,200band €3,200–€8,700

🇺🇸 United StatesNot soldCooper N12 was never a US-market car

What that meansNo US band exists to compare. Any car you find there's a private import, parts and specialist knowledge are thinner, and the price says more about import cost than about the market.

US figures are the EU band converted at a stated rate. No US market differential is modelled: we hold no sourced US asking prices, and inventing one would be worse than saying so. What the comparison does show for real is availability. Most of this range was never sold in the US.

ModelMINI Hatch Cooper
ChassisR56
EngineN12
Years2006–2010
MarketCentral EU
Windowrolling 12 months to 2026-07

Good buy at or under the marker · Median asking price · bar spans the 10th to 90th percentile · dashed line is the r56 median, all 3 engines

Good buy isn't the same as cheapest. The good-buy figure assumes the known failure items are either done with receipts or verifiably not yet due. Full breakdown by facelift phase →

Buyer notes

Our judgement, kept separate from the records it's built on.

Our read, not a record

The R56 steers better than anything else this size and the naturally aspirated Cooper is the cheapest way in, which is exactly why so many neglected ones are for sale. Start it from stone cold and listen through the first five seconds, since a chain rattle at start-up is the fault that decides the purchase. Ask for receipts rather than assurances, because the repair is well into four figures at a specialist. So budget for the work if the folder is thin, and price the car accordingly rather than hoping.

Everything above this line comes from the issue and specification records. This paragraph is our judgement on top of them. See how we reach it.

Full specification

Manufacturer figures for this engine and body, as recorded in the variant and engine data.

Engine code	N12B16 1.6
Configuration	I4, naturally aspirated · 1598 cc
Fuel / injection	petrol · port
Model years	2006–2010
Facelift phase	Sold either side of the 2010 facelift, 2006–2009 pre, 2010 LCI
Power / torque	120 PS · 160 Nm
Transmissions	6-speed manual · 6-speed automatic (Aisin)
Gearbox families	Getrag six-speed manual (MINI) · Aisin six-speed automatic
Drivetrain	FWD
Economy (real-world)	6.5–8 l/100 km mixed
Markets	EU