Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2006 Mini Cooper owners, lightly cleaned up (personal details are redacted by NHTSA).
Tl* the contact owns a 2006 Mini Cooper. While driving 60 MPH, the vehicle lost power. Also, when making a left or right turn, the engine light illuminated for a second and dimmed. The failure recurred each time the vehicle was driven. The vehicle was taken to the dealer where it was diagnosed, but the cause of the failure could not be located. The failure recurred. In addition, while driving 54 MPH, the vehicle stalled without warning. The contact coasted the vehicle over to the side of the road and it began to smoke and leak oil. The dealer diagnosed that the engine failed and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failures. The failure mileage was 52,000.
70K and on my third serpentine belt ,battery light goes on and incredibly hard to steer left or right and car dies. When the belt shreds or breaks the car dies and only moves at below 5 MPH ,only warning is a battery light ... People buying this car for teens dont ! Had to replace transmission at 30 k ... If you buy this car used with low mileage get the transmission checked . Note : transmission check requires the engine to be pulled out and will cost $500.00 oil pan constantly leaks. If vw is bad BMW /Mini Cooper is worse and getting away with highway robbery . Seat belts always getting twisted and require the need to pul off road to fix because they tighten and won't release tension. Look into driver and passenger leather seats falling apart ... Waiting for side impact air bag to go off because of poor material and textile use . …
Tl* the contact owns a 2006 Mini Cooper. The contact stated that while driving at approximately 60 MPH, there was a loss of power steering. The vehicle was taken to an independent mechanic where the power steering pump was replaced however the failure recurred the next day. The vehicle was taken back to the mechanic and unknown repairs were performed. In addition, the air bag warning indicator illuminated continuously. On a separate occasion, the alternator failed and was not replaced. The contact mentioned that the engine cooling fan also failed to function, which caused the radiator to be replaced twice. The engine was replaced at a different time. The manufacturer was notified of the failure. The approximate failure mileage was 118,000.
Our car has only 53,000 miles on it. We are informed by 2 different dealers that it needs a new transmission totaling $10,000. We were not aware of the class action suit for this very issue that settled late last year. BMW/Mini knew about the defective transmission and said nothing. Our car is not drivable now and is unsafe to operate. It is worthless essentially after being maintained per their guidelines. When driving it lost control and was not able to shift into gears. Was stuck in 4th gear one time and was hard to stop. Could have caused an accident but we were able to get control.
Tl* the contact owns a 2006 Mini Cooper. The contact stated that while driving 65 MPH, the vehicle downshifted and stalled. The contact had to pull to the side of the road and shift into manual mode to shift the gears up and down. The contact also stated that the battery light illuminated while the vehicle was parked. The contact also stated that the engine malfunctioned due to the cooling system emitting smoke from the engine and corrosion on the engine itself. The contact did not take the vehicle to a dealer for a diagnostic test. The failure mileage was 74,000.
Tl* the contact owns a 2006 Mini Cooper. While driving 70 MPH, the steering wheel became difficult to turn. The vehicle was towed to nick alexander Mini (6201 alameda st, los angeles, ca 90001) where it was diagnosed that the power steering pump, alternator, and radiator cooling fan failed and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failures. The approximate failure mileage was 80,054.
I was driving in moderate traffic (40mph) when my car suddenly jerked so hard it felt like someone hit me from behind. Prior to this incident, I was feeling the jerkiness slightly and intermittently (felt like downshifting). After reading people's complaints in Mini forums, I'm starting to think this could be the beginning of my transmission failure. Luckily no one was hurt but if this continues, there could be some major injuries involved. About four months ago, my Mini started to overheat. I get my car serviced regularly so I didn't understand how my water levels and oil levels got so low to overheat my car. After reading up on this, other Mini owners faced similar issues. So now, I am required to check water and oil levels at every 1500 miles to avoid overheating. A little high maintenance? Tell me about it!!
The motor mount on the Mini Cooper is notorious for leaking hydraulic fluid and needing replacement after fewer than 20,000 miles of service. Mine showed fluid leakage at 18,000 miles, and many others on the internet report this defect in the neighborhood of 10,000 miles. The company has issued a technical service bulletin m22 01 06 for this problem, but will not treat this chronic and dangerous condition as a manufacturing defect. This defect could allow the motor to shift, leading to accidents and loss of life. Having been an automotive mechanic for years, I normally expect a motor mount to last about 75,000 miles. This unacknowledged manufacturing defect is unsafe and costly to repair. For example, I had it repaired at Mini of north scottsdale (az) and it cost me about $245.
Car lost power and started running and idling very rough. Service shop discovered that the nylon caps for the hydraulic lash valves had deteriorated and cracked and in some cases had fallen completely off having a negative affect on the engine compression. The original caps are bright yellow and after use and heat they turn orange/brown. Internet research shows some Mini's have steel lash caps. Seems that a engine component susceptible to heat damage should not be made of nylon/plastic. The car has a total of 18 of these lash caps and at least 12 are clearly cracked. There are currently no replacement parts available from Mini or in the aftermarket. Mini's only solution is to replace the entire rocker arms which is a very costly repair when the only failure is small nylon caps.
2006 BMW Mini Cooper, 2 door. Car suddenly loses power, shudders and engine shuts down. Occurs randomly. Has occurred 6 times since car was purchased, most recent occurrence September 2010. Each time car was taken to dealer. Each time dealer said it was fixed. Dealer does not share engineering information; so, I cannot determine exactly what was done. Dealer had to get Mini Cooper engineers for consultation on several occasions. Repair orders mention a part called the vanos on several occasions. Sudden lose of power appears to me to be a safety issue. Dealer has not been able to repair. Mini Cooper of north America has said there is no problem for them to remedy.
Engine complaints in other Cooper years
Frequently asked questions
How common are engine problems on the 2006 Mini Cooper?
NHTSA has 20 complaints about the engine & cooling of the 2006 Mini Cooper, 9% of the model year's 227 complaints. The component named most often is cooling system (1 mentions).
Is there a recall for 2006 Mini Cooper engine problems?
No. NHTSA lists no engine & cooling recall for the 2006 Mini Cooper, though it has 1 recall for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2006 Mini Cooper engine problems start?
Half of the complaints with a recorded mileage happened before about 72,000 miles, and 6% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 4 fires and 1 injury to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.