I've had my 18-55 lens for about 4 years and it now makes a very loud constant noise which seems to be focus and/or stabilzation motor.
Question is - what makes these fail/what is a typical failure cause?
I've been super careful with the lens and while I of course use it - it's been handled with care/never dropped, hit, etc. Frustrating and now it's a $350 repair on what was a $400 addition to the kit when I bought it.