Should I replace my alternator

Advice Needed
1

I have a 2008 Ford Fusion with 155k miles on it. I recently changed the serpentine belt and spark plugs, which cost me quite a bit. The mechanics at the shop mentioned I should consider changing the alternator since it might fail at some point. Right now, the car is working fine, but I’m worried about potential issues down the line.

Is it really necessary to replace the alternator at this mileage

2

You could change the spark plugs and belt yourself for under $100.

Why replace an alternator that’s still working? If it’s not broken, don’t fix it.

3

Ellis said:
You could change the spark plugs and belt yourself for under $100.

Why replace an alternator that’s still working? If it’s not broken, don’t fix it.

Exactly this.

4

Lyle said:

Ellis said:
You could change the spark plugs and belt yourself for under $100.

Why replace an alternator that’s still working? If it’s not broken, don’t fix it.

Exactly this.

Totally agree with that.

5

If it’s not broken, don’t fix it. No reason to change unless there’s a problem.

6

The engine and transmission could fail too, should you change those while you’re at it

7

My original alternator is still running fine at 215k miles, and I wash my engine bay with water every winter.

8

Since your lights aren’t LED, I’ve found that regular headlights will give you signs if the alternator is dying before it completely fails.

With your car at this mileage, trying to be overly proactive could lead to changing every part under the hood.

9

@Kingsley
That’s not how you diagnose a failing alternator, and it’s not true in most cases.

10

@Kingsley
The lights are fine for now. The serpentine belt broke recently, and while checking, the shop suggested the alternator too, but that seems too costly and unnecessary.

11

Ming said:
@Kingsley
The lights are fine for now. The serpentine belt broke recently, and while checking, the shop suggested the alternator too, but that seems too costly and unnecessary.

What I meant was, when the alternator starts to fail, your lights will flicker, which gives you time to react before it completely fails.

If that’s not happening, you’re likely okay for now. When it does start flickering, you can take care of it without much delay.

Here’s a helpful video about it https://youtu.be/9GLa7yBWJCo?si=_JTZy14pUNJzPkde