While resistors can last pretty much forever, they can not if they ones used are not rated for the job. I have plenty of electronics that have failed due to bad resistors. Installing one that can handle more load always solves the issue.

I think in this case I replaced mine after reading much into this. It was found they are not sufficient.

__________________
1991 560 SEL / 185k miles
1992 750il / 17k miles - project car