Engine management light
 

Hi there. I need some help. Ever since I bought my 2007 1.6 petrol mini cooper a couple of years ago, I have had a ****ling problem regarding the engine management light. Had it checked out at a few garages and the fault is regarding the emissions. One garage says its the cat the other says the cat is fine and passes all UK emission tests. I've had both lamda sensors changed and the air mass meter too. Still this light comes on after a few days once the fault code has been reset. Not sure what it is, a cat is expensive but so is changing the car.