It is a common misconception that the "expert" knows the best. Expert can be a trainee, or may be motivated to make more for its organisation or have yet to encounter your problem.
On the other hand, if you are using your car for a decade and feel it needs a new belt - then get a new belt. Worst case scenario- you will lose some money but learn a bit more about an item you use everyday.
On the other hand, if you are using your car for a decade and feel it needs a new belt - then get a new belt. Worst case scenario- you will lose some money but learn a bit more about an item you use everyday.
Experts don't have your instincts as a user.