Diagnostic Fees Explained (When They’re Fair)

Educational explainer. U.S.-focused; prices vary by state/region and by vehicle.

Diagnosis is labor. A fair diagnostic fee usually includes documented findings and a clear next-step recommendation. The problem is vague diagnosis with no written result.

When diagnostic fees make sense

Complex problems require testing and time. That’s what you’re paying for.

What you should receive

• Written findings
• Evidence/measurements when relevant
• Repair options and risks

When to seek a second opinion

If the repair is expensive and the diagnosis feels uncertain, a second diagnostic can be worth it.

FAQ

Can a shop waive the diagnostic fee?

Sometimes if you approve the repair, but it varies by shop policy.

Is a diagnostic fee always a scam?

No. The issue is whether the work is documented and competent.