really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
82,025 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2009 Mini Cooper engine problems

engine problem

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2009 Mini Cooper Owner Comments

problem #4

Apr 242016


  • 120,000 miles


The contact owns a 2009 MINICooper S. the contact stated that while driving at 75 mph, the vehicle began to decrease in speed while the accelerator pedal was depressed. The vehicle was taken to an independent mechanic where it was diagnosed that the vacuum pump failed and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 120,000.

- Marietta, OH, USA

problem #3

Dec 042014

Cooper 4-cyl

  • 77,100 miles
I was driving on the highway 12/04/2014 with cruise control active going about 75 mph. A truck in front of me became too close because he was going slower. My car began accelerating and I hit the brake to slow down, and de-activate the cruise control. However nothing happened and my MINICooper continued to accelerate and I hit the rear end of the truck. I used the cruise control on/off and turned off the cruise control and I stopped accelerating. I changed lanes to pull over, however I had no brakes. I exited the highway as there was a big hill, however with no brakes I went flying through an intersection while honking my horn, and through the red light. The only option was back on the highway after the light and I eventually slowed down and then used the emergency brake to stop. I really panicked and thought I was going to die. The truck had no damage, however the MINICooper got a dent on the hood. This also happened briefly about a month ago, where I hit the brake and my MINIcontinued to accelerate while in cruise control, however when I turned off the cruise control that time, the brakes were fine and I had a close miss of rear ending another car. In hindsight I should have put my 6 speed in neutral or turned off the car. At the time, these options didn't come to me in a panicked state.

- Schertz, TX, USA

problem #2

Mar 212014

Cooper 4-cyl

  • 45,000 miles
The thermostat failed, the temperature elevated, the freeze plug fell out/broke out of place causing the head gasket to blow out. The coolant leaked into the oil and caused it to become "milky" therefore blowing out my engine. I was driving on the freeway at the time of the incident and the car failed to accelerate. Luckily people were kind enough to let me pass from the far left lane to the nearest exit and I did not crash.

- Los Angeles, CA, USA

problem #1

Oct 172013

Cooper 4-cyl

  • 86,000 miles
Total loss of power as I was crossing a major highway, car towed to local BMW certified mechanic, shows timing chain misfire, needs total replacement with multiple components needing replaced due to timing chain problem. 3300$ worth of damage to engine. Apparent problem with timing chain on thousands of MINIcooper and they have not called a recall on the piece. This was almost a major accident for me and is causing me thousands of dollars to replace and major inconvenience.

- St.Georges , DE, USA

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