there's a common problem with headlamps going out what would i need to do to fix on 2005 Saab 9-5

fixing for a friend ,work as an advisor with saab lights are being replaced often ,headlamp has film noticed splash shield under bumper missing and did read of a leaking headlamp washer leak but is not equipped stated left one was flashing often and only one working is left high beams

Asked by for the 2005 Saab 9-5
1 answer
if moisture gets in your lens it will burn out pretty quick you can get use ones fairly reasonable