™How to read a repair quote, line by line
Repair estimates use shop shorthand. Here’s what each part of a typical quote means, and what’s worth asking about.
A sample quote, explained
| # | Line on the quote | What it means and what to ask |
|---|---|---|
| 1 | Customer concern Check engine light on, rough idle | This is what you told the shop. Make sure it matches what you actually noticed. |
| 2 | Diagnosis / inspection Scan codes, inspect ignition system — 1.0 hr | A diagnostic charge pays for the technician’s time to find the cause. Ask whether it’s credited toward the repair if you approve it. |
| 3 | Part: ignition coil, cyl. 3 (aftermarket) Qty 1 | Shows the part, quantity and type. If the type isn’t marked, ask: genuine (OEM), aftermarket or remanufactured? What’s the warranty? |
| 4 | Labor: replace ignition coil 0.4 hr | Most shops bill a standard “book” time for each job rather than the clock. Ask what labor guide or time the shop used. |
| 5 | Part: spark plugs (set) Qty 4 — “recommended” | A recommendation, not the fix for your concern. Ask: is it due by my owner’s manual schedule, or was something found? Can it wait? |
| 6 | Labor: replace spark plugs 1.0 hr | On some engines, plugs and coils share labor, since the coils come off to reach the plugs. Ask whether the overlapping time was counted once. |
| 7 | Fuel system cleaning service “recommended” | Worth asking about: what problem would it solve on your car, and does your manual call for it? |
| 8 | Shop supplies % of labor | Many shops add a small fee for rags, cleaners and disposal. Ask how it’s calculated and what it covers. |
| 9 | Tax, totals, warranty, signature line | Check that the total matches the lines, the warranty is written down, and you’re only signing to approve what you agreed to. |
Parts: OEM, aftermarket or remanufactured
Genuine (OEM) parts come from the carmaker’s supplier. Aftermarket parts are made by other companies and range from budget to excellent. Remanufactured parts are rebuilt used parts, common for alternators and starters. Each can be a fair choice; what matters is that the quote says which one and what warranty comes with it.
Labor: hours and hourly rate
Labor is usually the hours listed times the shop’s hourly rate. If the quote shows a single labor total, it’s fine to ask how many hours that is and what rate the shop uses.
“Recommended” items
Many quotes mix the repair you came in for with maintenance the shop recommends. Recommendations can be genuinely useful. Ask what was found, and compare with your owner’s manual schedule.
Fees
Shop supplies, environmental or disposal fees and diagnostic charges are common. They should be listed and explained.
Questions to ask before you approve a repair → · Free quote checklist →
Frequently asked questions
Should I get a written estimate?
It’s a good habit. A written quote lets you see each line, ask questions, and compare against a second opinion.
What does “book time” mean?
Many shops bill labor from a published guide that lists a standard time for each job, rather than the time the technician actually spends. That’s a normal industry practice.
Is it OK to approve only part of a quote?
Yes. You can approve the repair for your concern and ask for time to think about “recommended” extras. Ask which items are safety-related and which can wait.
General information, not professional mechanical advice and not a substitute for an inspection by a qualified technician.