P0012 on MINI: How to Diagnose & Fix
Intake Camshaft Position Timing - Over-Retarded (Bank 1)
3 MINI models · 4 documented issues · 3 critical · $350-$3,000 repair
P0012 on MINI by model: symptoms, diagnosis and fix
The R56 Cooper S N14 engine (2007-2010) is particularly notorious for timing chain tensioner failure, even more so than the naturally aspirated N12. The higher cylinder pressures from turbocharging accelerate chain stretch and guide rail wear. The revised N18 (2011-2013) improved but didn't fully resolve the issue.
Common Symptoms
- Loud rattling on cold start
- Check engine light
- Reduced power
- Engine misfire codes
- Metal debris in oil
How to Fix
Replace timing chain, tensioner, guides, and sprockets. N14 engines should have this done proactively at 50-60k miles. N18 engines are better but should be inspected at 80k. Replace oil pump chain at the same time.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- MINI N14 timing-chain kit 11318618317KTOEMFCP Euro 11318618317KT / MINI 11318618317
VIN-confirmed N14 timing-chain, guide and tensioner failure branch Fitment/availability: The inspected direct U.S. Confirm VIN and kit contents before purchase; it is not the N18 branch a
- MINI N18 timing-chain kit 11318618318KT1OEMFCP Euro 11318618318KT1 / MINI 11318618318
VIN-confirmed N18 timing-chain, guide and tensioner failure branch Fitment/availability: The inspected direct U.S. Confirm VIN and kit contents before purchase; do not use it for N14 or
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Sources for this issue (3)
The R56 Cooper's N12 engine suffers from premature timing chain tensioner and guide rail failure. The plastic chain guides deteriorate, causing chain slack that leads to rough running and potential catastrophic engine damage if the chain jumps timing.
Common Symptoms
- Rattling noise on cold start
- Check engine light
- Rough idle
- Loss of power
- Engine misfire
How to Fix
Replace timing chain, tensioner, and guide rails. Use updated BMW/MINI parts with revised guide rail material.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- MINI N12/N16 timing-chain kit 11318618318KTOEMFCP Euro 11318618318KT / MINI 11318618318
VIN-confirmed naturally aspirated N12/N16 timing-chain, guide and tensioner repair branch Fitment/availability: The inspected direct U.S. Confirm VIN and engine before purchase; it does not esta
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (3)
- 2008 Mini Cooper engine complaints (CarComplaints, page 2)owner-complaints (NHTSA complaint mirror)
- Timing Tensioner Problems of Mini Cooperowner-complaints (NHTSA complaint aggregator)
- Mini Cooper Timing Chain Problems May Stem From Defectlegal investigation summary
The valve cover gasket on N12/N16/N18 engines hardens and leaks oil onto the exhaust manifold, creating a burning oil smell. VANOS solenoid seals also leak, causing oil to pool around the solenoids and potentially cause misfires.
Common Symptoms
- Burning oil smell
- Oil on exhaust manifold
- Visible oil leak from valve cover
- Check engine light
- Rough idle
How to Fix
Replace valve cover gasket (the gasket set, part 11127567877, is sold separately from the cover; replace the whole cover only if it is cracked) and VANOS solenoid O-rings. Clean oil residue from exhaust manifold.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine MINI valve-cover profile gasket set 11127567877OEMMINI 11127567877
Confirm VIN, engine and that the cover itself is n
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (2)
The 1.6L N16 (Cooper Coupe) and turbo N18 (Cooper S and JCW Coupe) engines can develop timing chain stretch and timing chain tensioner failure. The tensioner uses oil pressure to push a piston against the chain. When the piston does not extend fully, the chain goes slack and hits the plastic guides. The result is a rattle, most often heard at a cold start or at idle. The plastic guides can also break. A MINI parts specialist says the N18 top guide fails often and is commonly found broken, lying in the top of the cylinder head, when the valve cover comes off. Owners of affected engines also report rough running, a check engine light and loss of power.
Common Symptoms
- Chain rattle at cold start
- Rattle at idle
- Check engine light
- Rough running
- Loss of power
How to Fix
What to check first: if the engine rattles at a cold start or at idle, have a MINI specialist check the timing chain, tensioner and guides under the valve cover. Ask for the full set of parts rather than only a tensioner: the timing chain, the latest-version tensioner (MINI has updated this part several times), the guide rails and the top chain guide (MINI part 11317577631, listed for the 2012+ Cooper S Coupe and JCW Coupe, R58). On the earlier R56, MINI's own repair replaced the timing chain, chain guides, cam sprockets and VANOS unit, so ask the shop to inspect the sprockets and VANOS too. Coverage: MINI service bulletin SI M11 04 13 covers this rattle (low tensioner spring force and inconsistent chain tolerances, heard at idle or a cold start). It lists the R55, R56 and R57 but not the R58 Coupe. We found no recall or warranty extension that covers the Coupe. Ask a MINI dealer to check your VIN for open campaigns before you pay for the repair yourself.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (6)
- Lohen - Timing chain death rattle fix for MINI N18 enginesforum
- ECS Tuning - Timing Chain Kit N12/N16/N18 Engineretailer
- Top Timing Chain Guide N18 Engine R55-R60 Cooper S (Way Motor Works)parts-listing
- Timing chain tensioner R55-R61 (Way Motor Works)parts-listing
- MINI Solves the R56 Cold Start Issue (MotoringFile)article
- MINI TSB SIM-11-04-13 (CarComplaints)tsb
P0012 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0012 mean on a MINI?
P0012 stands for "Intake Camshaft Position Timing - Over-Retarded (Bank 1)." This code means the intake camshaft timing on Bank 1 is more retarded than the computer commanded — the variable valve timing system isn't reaching its target position. The computer controls camshaft timing through an oil-fed actuator (cam phaser) and a control solenoid; when actual timing lags the desired setting, this code sets. It is commonly caused by oil flow problems (low, dirty, or wrong oil), a stuck solenoid, or a worn cam phaser. Symptoms can include rough idle, reduced power, poor fuel economy, and sometimes rattling on startup. On MINI it is documented across 3 models: Cooper S, Cooper, Coupe.
What are the most common causes of P0012?
The most common causes of P0012 are: Low, dirty, or incorrect-viscosity engine oil, Faulty or stuck intake camshaft (VVT) oil control solenoid, Worn or stuck camshaft phaser/actuator, Clogged solenoid screen or oil passages, Wiring or connector problems at the solenoid, Timing chain wear or stretch affecting cam timing, Faulty camshaft position sensor. The specific cause varies by vehicle.
How much does it cost to fix P0012 on a MINI?
Published repair estimates on MINI range from $350 to $3,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.