i had the same problem with mine not so long back, had the car a while and no probs,put car in for mot "PASSED", then later on that nite cars started flashing me thinking i had full beam on which i didnt. went back to mot station to see if they had adjusted owt, but no was the reply,got them to check level of headlites with the machine and all was well. EVENTUALLY GOT FED UP OF CARS FLASHING ME (even tho lites wer checked ) and adjusted them myself down a little, no one has flashed me since