Hi All Thought i would be good and took wifes Mini for MOT Failed...... 1) Cracked spring on front 2) CO2 emissions high. Tester (a young lad) said he thought head gasket blown and possible broken piston ring !!!! Went and had a chat with my local garage, they looked at the test result readings and said they think its the cat. gone bad (12 years old, engines are known to use oil). They are sure a new cat. will cure it. Booked it in with them for next week, thought i would look at "cracked" spring, its not cracked, its hanging off the strut !!!!!, unsafe to drive, but i was not told that, so have parked it up waiting for next Thursday for work to be done. Anyone comment on the CO2 readings being high caused by CAT. or could it be something else. Car runs very well, 110,000 miles, does not use water, does not overheat, pongs a bit when cold (exhaust) like its on choke. Comments ?