2011 Legacy with front light issues
Interesting question. Bulbs do burn out, but premature failure is often caused by overvoltage from the alternator. Have your dealer check the alternator for correct voltage AND waveforms. You can check it yourself with a multimeter. If the battery voltage is more than about 14.5Vdc, eg 15+, the alternator has to be replaced.
thanks alot, problem solved.
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