Hi guys, I have a 1.6 A3 8L. Owned the car for 2 years with no problems, however over the past few weeks it seems to continually trigger several sensors - the garage tell me they are the O2 sensor and the fact the car is running too lean -(more recently i get a front brake warning light, just changed my brakes 3 weeks ago, which is weird). We have changed the sensors several times, and looked for air leaks. Sadly the problem still persists. Has anyone experienced anything similar? Could it be related to a duff battery ? Thanks in advance for your time. Marty.