When hard cornering lately, my e46 325i lets the traction control cut in and I get severe under steer and the triangle flashes at me. Having owned the car for nearly 3 years and driven it round the same bends I know that something has gone tits up. :eek
tyres do go 'off' slightly as they get near to the end of their life.
fronts got a couple of mm left yet car understeers?...time for new front tyres i reckon.
also,the pressures may be out since the weather warmed up slightly.