It might not be what you want to hear, but if your go-to mechanic tells you to replace your fuel injectors, you’ll need to change them. Damage begets more damage—corrosion leads to further damage, and if this natural wear and tear process isn’t managed over time, it will become irreparable. It’s affordable and only needs to be done every 3,000 miles or so, so save yourself the expense of replacement with proper maintenance. Listen to your vehicle for telltale issues when starting, trouble accelerating, general sputtering, and an iconic knock, and take it as a sign to add some fuel injector cleaner. If you leave it too long, you’ll need to replace your fuel injector.