Quality Control & Test Drive: the full procedure
Run a post-repair QC checklist and road test to confirm the original concern is fixed and nothing was left undone.
- Applies to: Technician or QC lead.
- Frequency: Every repair order before delivery.
- Scope: Covers final verification and road test. Technical re-test procedures defer to OEM service information.
What you need
- QC checklist
- Scan tool (DTC recheck)
- Test-drive route
- Torque-check tools
- Interior / engine-bay inspection
The procedure, step by step
- Verify the original concern — Confirm the customer’s stated symptom is actually resolved — not just the part replaced.
- Recheck for codes — Clear and rescan for diagnostic trouble codes to confirm no faults remain or returned after the repair.
- Inspect fasteners & connections — Confirm fasteners, clamps, hoses, and connectors related to the repair are secure and to spec.
- Check fluids & levels — Verify fluid levels and check for leaks at the repaired area.
- Road test — Drive the vehicle over an appropriate route, listening and feeling for the concern and any new noise, handling, or braking issues.
- Confirm nothing left behind — Account for all tools and rags and confirm none are left in the engine bay or cabin.
- Reset for delivery — Reset the trip/oil reminder if applicable and return seats, mirrors, and radio to where the customer left them.
- Sign off QC — Mark the RO as QC-passed before it moves to delivery.
Quality check before you finish
- Original concern confirmed resolved on road test.
- DTC rescan clean.
- Repair-area fasteners and connections secure.
- Fluids correct and no leaks.
- No tools or rags left in vehicle.
- Customer settings restored.
- QC sign-off recorded on the RO.
This is a free, source-anchored standard operating procedure (SOP) you can print and hand to staff. It documents the work sequence for a Auto Repair Shop business — not safety or regulatory rulings, which defer to the cited authorities, the applicable code, and your own health-and-safety plan. Open the tool above to print it, toggle ink-saver, or (with a free ToolFluency Business account) edit it to match your own workflow.
Sources
- ASE — Quality Standards (ase.com)
- Autobody News / Process Street — Post-Repair QC Practice (autobodynews.com)
- AAA Approved Auto Repair — Workmanship Guarantee (aaa.com)
About Free Quality Control & Test Drive SOP for Repair Shops
Free printable QC & test drive SOP: verify the concern is fixed, rescan codes, check fasteners and fluids, road test, and confirm nothing was left behind.
How to use
- Read the full procedure top to bottom before the work — the SOP runs in order and each step builds on the last.
- Toggle Ink-saver (black & white) for a cheaper mono print for the binder; leave it off for the full-color version.
- Click Print SOP to print or save as PDF. Print one per crew, laminate it for the binder, or attach it to the job in your scheduling system.
- Train new hires on it and have staff sign off. Found something out of date? Use the feedback link — flagged SOPs are re-researched against the source list.
Frequently asked questions
Why rescan for codes after the repair?
A clean post-repair scan confirms the fault is actually cleared and no new codes were triggered during the job — the cheapest way to catch a comeback before the customer does.
Is a road test really necessary on small jobs?
For any concern that shows up while driving (noise, vibration, braking, drivability), yes. Verifying the symptom is gone on the road is the only way to confirm the fix from the customer’s seat.
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