P0017 on MINI: How to Diagnose & Fix
Crankshaft/Camshaft Position Correlation - Bank 1 Sensor B
5 MINI models · 5 documented issues · 5 critical · $1,200-$3,000 repair
P0017 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
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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 N14 turbocharged engine in early MINI JCW models suffers from a defective timing chain tensioner that allows the chain to develop excessive slack. This produces a loud rattling noise on cold start (known as 'death rattle') that can progress to timing chain skip or breakage, causing catastrophic valve-to-piston contact. Under a class-action settlement (Skeen v. BMW of North America), MINI bulletin SI M01 07 16 extended the timing chain and tensioner warranty to 7 years or 100,000 miles for 2007-2010 N14 models, including the 2009 JCW Hardtop and Clubman and the 2009-2010 JCW Convertible. The JCW kept the N14 until 2012, when the improved N18 engine replaced it.
Common Symptoms
- Loud rattling or chattering noise on cold start (death rattle)
- Rattle duration increasing over time from seconds to minutes
- Check engine light with timing correlation codes
- Engine running rough or misfiring at idle
- Sudden catastrophic engine failure if chain skips timing
How to Fix
If you hear a rattle on cold start that lasts more than a few seconds, have the timing chain tensioner inspected immediately. Replace the tensioner, chain, and guides as a complete kit — do not replace the tensioner alone. The repair costs $1500-2500 at an independent MINI specialist (less than dealer pricing). The class-action extended warranty (7 years/100,000 miles from in-service date, MINI bulletin SI M01 07 16) has now expired on all eligible cars, so expect to pay for the repair yourself.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine MINI N14 timing-chain kit 11318618317KTOEMFCP Euro kit 11318618317KT
VIN-confirmed N14 chain, guide and tensioner replacement after mechanical diagnosis Fitment/availability: The inspected direct U.S. Confirm VIN/production and engine condition; VANOS part
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- WarningDo NOT ignore the cold-start rattle even if it goes away after warm-up. The tensioner is progressively failing, and once the chain jumps timing, the engine is destroyed. Budget for this repair as preventative maintenance.
- TipUse a MINI specialist or independent BMW shop rather than the dealer — the timing chain job on the N14 is well-documented and specialists charge $1000-1500 less than dealer pricing.
Sources for this issue (3)
On the R55 Clubman's Prince-family engines (N14 turbo Cooper S/JCW, and to a lesser degree the N12/N16), the hydraulic timing chain tensioner bleeds down when the engine sits, and the plastic chain guides/rails wear and crack. The result is a loud rattle for 1-3 seconds on cold start that progressively worsens. As the chain stretches and the guides break up, the chain can skip teeth or jump the rails entirely, causing valve-to-piston contact and total engine destruction. NHTSA complaints on 2009-2010 Clubmans repeatedly describe dealers calling the rattle 'normal' right up until the chain broke and destroyed the engine. Early cars used a superseded tensioner part number that MINI later revised.
Common Symptoms
- Loud metallic rattle for 1-3 seconds on cold start
- Rattle at idle that gets louder over time
- Loss of power / rough running
- Check engine light for camshaft correlation
- Sudden engine shutdown and no restart
How to Fix
Treat any cold-start rattle as urgent. Replace the timing chain, both guide rails, the chain sprockets, and the tensioner with the latest revised (updated part number) tensioner - a partial repair with the old tensioner design commonly fails again. The job requires the engine front cover to come off. If the chain has already jumped, the head must come off for a valve inspection and the engine is often not economical to save. Strict 5,000-mile oil changes with the correct spec oil slow guide wear.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- FCP Euro MINI N14 timing-chain kit 11318618317KTOEMFCP Euro 11318618317KT
Matched N14 chain, guide and tensioner service branch after N14 identity and timing wear are confirmed Fitment/availability: The inspected direct U.S. Confirm the R55 VIN/engine, kit contents aga
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Sources for this issue (2)
The timing chain on the N18 (GP2) and B48 (GP3) engines stretches over time, causing a characteristic rattle on cold start and eventually triggering timing-related fault codes. The N18 engine is more prone to this issue than the B48. The chain tensioner cannot compensate for excessive chain stretch, leading to retarded cam timing, rough running, and in severe cases, the chain can jump teeth causing valve-to-piston contact. The high-RPM nature of GP driving accelerates chain wear.
Common Symptoms
- Rattling or clattering noise from engine on cold start
- Rattle that disappears after engine warms up
- Check engine light with cam timing codes
- Rough idle
- Reduced engine power
- Engine will not start (if chain has jumped)
How to Fix
Replace the timing chain, tensioner, and guides as a preventive measure at 60,000-80,000 miles on the N18, or when rattling first appears. The B48 is more durable but should still be inspected at 80,000+ miles. Parts cost $300-$600 for a complete kit; labor is 6-10 hours ($900-$1,500) on the N18. On the B48 the chain sits at the rear (flywheel side) of the engine, so the job needs the engine/transmission and flywheel removed and costs more. Use OEM timing components only — aftermarket chains stretch faster. Always replace the chain guide rails and tensioner at the same time.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- MINI N18 timing-chain kit 11318618318KT1OEMFCP Euro 11318618318KT1 / MINI 11318618318
2013 R56 GP2/N18 mechanically confirmed timing-chain, guide or tensioner failure branch Fitment/availability: The inspected direct U.S. Confirm GP2 VIN, engine and kit contents;
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Owner tips & cautions
- WarningCold start rattle is the canary in the coal mine. Once you hear it, you have a limited window to replace the chain before it jumps and bends valves. Do not delay this repair.
- TipIf buying a used GP2 with the N18 engine, ask for timing chain replacement records. If no documentation exists, budget $2,000 for preventive replacement.
Sources for this issue (2)
P0017 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 P0017 mean on a MINI?
P0017 stands for "Crankshaft/Camshaft Position Correlation - Bank 1 Sensor B." This code means the engine computer has detected that the crankshaft and the Bank 1 'B' camshaft (typically the exhaust camshaft) are out of their proper timing relationship with each other. The computer compares the crankshaft position signal to the camshaft position signal, and when they don't line up within the allowed window, it sets this correlation code. This usually points to mechanical timing being off, most often from a stretched or worn timing chain, a slipped or stuck variable valve timing phaser, or a tensioner problem. You may notice rough running, low power, rattling at startup, or a no-start, and it should be addressed promptly to avoid valve-to-piston contact on some engines. On MINI it is documented across 5 models: Cooper S, Cooper, John Cooper Works, Clubman, GP.
What are the most common causes of P0017?
The most common causes of P0017 are: Stretched or worn timing chain, Worn or failed timing chain tensioner or guides, Stuck or faulty variable valve timing (VVT) cam phaser, Faulty VVT oil control/solenoid valve, Low or dirty engine oil affecting phaser operation, Faulty camshaft or crankshaft position sensor, Timing chain jumped a tooth or incorrect timing after service, Damaged reluctor (tone) ring. The specific cause varies by vehicle.
How much does it cost to fix P0017 on a MINI?
Published repair estimates on MINI range from $1,200 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.