Timing chain, belt or tensioner failure on the 2011 MINI Cooper S
Only 3 reports for this mode came with an odometer reading, which is too few for percentiles to mean anything. The page is here because someone linked to it; treat the figures as anecdotes, and see the full report for this year instead.
When timing chain, belt or tensioner failure gets reported
There are 3 reports of timing chain, belt or tensioner failure on the 2011 MINI Cooper S, 3 with a mileage attached. That is too few to place the failure on the odometer with any confidence.
A part like this is normally expected to survive 120,000 miles. It is the 4th most-reported problem on this model year.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| — | — | 47,000 miles | — | — |
Read the 10th percentile as “one report in ten arrived this early”. Exact figures are shown in this table because it is the table of record; everywhere else on the site they are rounded to the precision the sample can carry.
What a percentile can and cannot tell you here
These five numbers describe the readings owners gave, in order. The median is the middle one: half the reports arrived below it. The 10th and 90th are the edges of the bulk of the distribution, and the distance between them is the part worth reading. A tight spread — say 70,000 to 95,000 miles — points at something that wears out on a schedule, and the schedule is knowable. A wide one, 20,000 to 190,000, points at a fault that hits some cars and never troubles others, which means the mileage on the listing in front of you tells you very little about your odds.
What these figures are not is a survival curve. Every reading here comes from a car whose owner filed a complaint, so the sample contains only failures: it cannot say what share of the fleet made it past 150,000 miles untouched, because those owners had nothing to report. Nor is the mileage the moment of failure — it is the odometer reading as recalled at the time of filing, which may be weeks later and is sometimes rounded to the nearest ten thousand by the person typing it.
Percentiles are shown at all only once 8 readings exist for the vehicle and mode. Below that the middle of a handful of numbers is noise wearing a decimal point, so the figures are withheld rather than dressed up.
What happens, and what it costs
Putting it right typically runs $1,200–$4,500 at an independent US shop. That range is an editorial estimate held in this site's failure-mode catalogue, not a figure from NHTSA, and it is a repair cost rather than a diagnosis cost.
This mode is classified as critical, which means a failure can leave the car unable to stop, steer, or stay out of the way of traffic. It is weighted accordingly in the risk score.
The same failure on other years
The same failure is reported on 5 model years of this car. It shows up earliest on the 2011, at a median of 45,000 miles, and latest on the 2010 at 65,000 miles.
By volume the 2007 carries the most reports, with 115; the 2011 has 3. A mode that appears across most years of a model is usually a design choice rather than a bad batch.
If one year stands out to the left, that is the year to avoid; if the whole line sits at a similar mileage, this is wear rather than a defect in one production run.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The mileage is the one the owner gave.
Timinig chain tensioner had a washer stripped, oil was leaking all of ther engine and it was down to less than a quart. It's a known issue with mini coopers all over the internet where a $10 part, if not caught causes major engine repairs, or worse, engine replacement. Mini cooper dealer wont fix it for free even though it's touted "maintenance free" chain belt. Vehicle only has 22,365 miles on it.
Tl* the contact owns a 2011 mini cooper s. While driving 70 MPH, there was an abnormal noise coming from the front passenger side of the vehicle. The vehicle was taken to a dealer who diagnosed that the timing chain fractured and needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 47,000. Updated 06/15/16*lj *tr
Tl* the contact owns a 2011 mini cooper s. While driving at any speed, the check engine and oil pressure warning indicators illuminated. The vehicle was taken to the dealer (south bay mini in torrance, ca, 310-939-7150), but the technician was unable to duplicate the failure. The failure recurred. The vehicle was taken to an independent mechanic who diagnosed a code from the spark plug. The technician also diagnosed that the valve cover was punctured and leaked oil; however, the technician was unable to determine how the failure occurred. The vehicle was taken to another independent mechanic who specialized in mini vehicles and diagnosed that the timing tensioner exploded and punctured the valve cover. The timing chain tensioner was replaced. The manufacturer stated that there was no recall and referred the contact to the dealer (universal city mini in north hollywood, ca, 8148-452-1139) and the fuel pump was replaced. The failure mileage was 130,000.
Also reported on the 2011 MINI Cooper S
Other electrical problem
Water pump failure
Other engine problem
Software fault or failed update
Stalling while driving
Radiator or coolant leak
How far this goes
This page is kept out of search results because 3 reports is not enough to publish percentiles from. It stays reachable because somebody looking at this exact car would rather see the reports than be told there are none.
Complaints are voluntary, so 3 is a floor and not a count of affected cars. Mileages are typed in by owners and cluster on round numbers. And the mode itself is assigned by software reading the complaint text, which is reliable in bulk and fallible one report at a time.
Questions this page answers
At what mileage does timing chain, belt or tensioner failure happen on the 2011 MINI Cooper S?
Across 3 owner reports that included an odometer reading, half were filed by 45,000 miles. A quarter were filed before — and a quarter after —. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is timing chain, belt or tensioner failure on the 2011 MINI Cooper S?
3 reports have been filed with NHTSA, about 0.6 per 1,000 vehicles. Complaints are voluntary, so this is a floor rather than a count of affected cars.
What this is and is not. These are the mileages at which owners chose to complain to a federal agency, which is not the same as the mileage at which the part fails on every car. It skews toward failures that happened outside warranty, cost real money, or frightened someone. It is still the only public dataset that carries failure mileage at all, and the shape of a few hundred readings is informative even when a single one is not. Methodology · JSON · this failure on other cars
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed