A Technical Service Bulletin (TSB) is a notice a manufacturer sends to its dealers describing a known, non-safety issue on certain models and the recommended fix or diagnostic procedure. Unlike a recall, TSB repairs are not automatically free — they're only covered if the vehicle is still under warranty. You can search TSBs for free using your car's year, make, model, and VIN through the NHTSA database, which is worth doing before paying for diagnostics on a recurring or unusual problem.
At a glance
| Question | Answer |
|---|---|
| Is a TSB the same as a recall? | No — TSBs address non-safety issues; recalls address safety defects and are free |
| Are TSB repairs free? | Only if the vehicle is still under the applicable warranty |
| Where to search TSBs | NHTSA's free public database, by VIN or year/make/model |
| Who issues TSBs | The vehicle manufacturer, sent to its franchised dealers |
| How often are they issued | Continuously, as dealers report recurring issues to the manufacturer |
What a TSB actually is
When a particular repeated complaint shows up across enough vehicles of the same model, a manufacturer's engineering team investigates, documents a diagnosis, and issues a Technical Service Bulletin to dealership service departments describing the symptom, the root cause, and the approved repair or software update. TSBs cover things like a rattling noise from a specific trim panel, a software update to fix erratic transmission shifting, or a revised part number for a component that fails prematurely.
TSB vs. recall: the difference that actually matters to your wallet
A recall is issued when a defect creates a safety risk or fails to meet a federal safety standard, and by law the manufacturer must fix it for free regardless of vehicle age or ownership history. A TSB covers issues that are annoying, costly, or inconvenient but not classified as a safety defect — a rattle, a software glitch, a part that wears faster than expected. That means a TSB repair is billed at normal shop rates once the vehicle is out of its warranty period, even though the manufacturer has effectively admitted the issue is common enough to document.
Why it's still worth checking
If your car is exhibiting a specific, describable symptom — a particular noise, a warning light, rough shifting at a certain speed — searching for an existing TSB before paying for open-ended diagnostics can save real money. A shop that already knows "this engine code plus this noise equals this known fix" from the TSB database can go straight to the repair instead of hours of trial-and-error diagnosis.
How to search for a TSB
- Go to NHTSA's public complaints and TSB search tool.
- Enter your vehicle's year, make, and model (or VIN for the most precise match).
- Filter results by component (engine, brakes, electrical, etc.) to narrow down relevant bulletins.
- Note the TSB number and bring it up with your dealer or independent shop — most repair software and NHTSA listings show which vehicles and, sometimes, which VIN ranges are affected.
What to do if you find a matching TSB
If the vehicle is still within its manufacturer warranty period, bring the TSB number to a franchised dealer and ask them to perform the documented repair under warranty — you shouldn't be charged. If the warranty has expired, the TSB at minimum tells an independent shop exactly which fix to pursue, which typically reduces diagnostic time and labor cost even though you're paying out of pocket.
TSBs and used-car buying
Before buying a used car, it's worth checking for open or historical TSBs on that specific model year for chronic issues — a recurring transmission or electrical TSB across many complaints is a useful data point alongside a pre-purchase inspection, even though it won't show up as a red flag on a standard vehicle history report.
A shop or dealer isn't obligated to volunteer that a TSB exists — many drivers only discover one after searching independently, so don't assume "no one mentioned it" means there isn't one.
Frequently asked questions
Are TSB repairs free?
How do I check if my car has a TSB?
What's the difference between a TSB and a recall?
Can an independent mechanic use a TSB?
Do TSBs affect resale value?
Sources & further reading
- NHTSA — technical service bulletins search
- Federal Trade Commission — Magnuson-Moss Warranty Act overview
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