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What is a technical service bulletin?

A TSB or manufacturer communication provides service information about a condition or procedure. It is not automatically a recall or free repair. This safety, ratings and recalls answer depends on Document scope, Warranty status, Repair procedure, VIN/build date. Confirm each against the exact vehicle rather than assuming a class-average figure. The sections below break this down further: what a bulletin is and is not, how to use one, whether it costs you anything. 4 related follow-up questions are answered separately below, each with its own conditions attached. This site reviews every answer under a configuration-first standard, verified against NHTSA datasets and APIs and linked to related safety, ratings and recalls questions for the adjacent decisions this one usually raises. It sits within a safety, ratings and recalls library of 8 related questions, held to the same configuration-first standard.

A technical service bulletin is a manufacturer communication to its dealer network describing a known condition and the procedure for diagnosing or repairing it. Its purpose is consistency, not safety determination.

Bulletins are frequently the most practically useful record for an owner with a specific symptom, because they describe exactly what the manufacturer has told technicians to check.

What a bulletin is and is not

It sits between a complaint and a recall in authority, and carries no automatic obligation.

  • Is: documented manufacturer guidance on a known condition
  • Is: often the fastest route to a correct diagnosis
  • Is not: a determination of a safety defect
  • Is not: automatically a free repair, though warranty or goodwill may apply
  • Is not: a recall, and does not appear in a VIN recall search

How to use one

Search bulletins by year, make and model for the symptom you are experiencing, then bring the reference to the shop.

A technician working from the applicable bulletin usually reaches the answer faster than one diagnosing from scratch.

Whether it costs you anything

Within warranty, the repair described is usually covered. Outside warranty it is normally at your expense, though manufacturers sometimes extend goodwill coverage on widespread conditions, particularly with documented service history.

Bulletins are searchable through NHTSA and through subscription services. Asking a dealer to search bulletins for your specific symptom is a reasonable request and costs nothing.

  • Usually covered within warranty
  • Outside warranty, normally at your expense
  • Goodwill coverage is discretionary and helped by service history
  • Ask a dealer to search bulletins for your symptom

What changes the answer

  • Document scope
  • Warranty status
  • Repair procedure
  • VIN/build date
Methodology: how to verify an answer on one vehicle →Search EPA configurations →Decode the VIN →Check recall campaigns →

Common follow-up questions

Is a service bulletin covered by warranty?

It can be, if the vehicle is within warranty and the condition qualifies. Bulletins are not automatically free repairs the way safety recalls are.

How do I find bulletins for my car?

Bulletin summaries are published and searchable by year, make and model, and franchised dealers have the full text.

Does a bulletin mean a design flaw?

Not necessarily. Bulletins document known conditions and consistent procedures, which is normal for complex products.

Is a technical service bulletin a recall?

No. A recall addresses a safety defect and is free with no age limit. A bulletin is technician guidance about a known condition, with no automatic free repair.

Related questions

Safety, ratings and recalls questions and answers: the complete category

Do NHTSA ratings apply to every trim?→What is the difference between NHTSA and IIHS ratings?→Does a five-star rating mean a vehicle has no recalls?→How do I check if a recall repair was completed?→

Evidence

A bulletin is not a recall

A technical service bulletin is a manufacturer's instruction to its dealers for repairing a known problem, such as a noise, a hard shift, a software calibration or a warning light that comes on with no fault. It does not describe a safety defect, and manufacturers report new bulletins to NHTSA, which keeps them in its records.

The two differ in who pays and who is told. A recall covers a defect that may compromise safety: the manufacturer must notify owners by mail and the repair is free, regardless of warranty status. A bulletin goes to the dealer network, not the owner's mailbox, and the dealer has no obligation to call you in. The repair is generally free only while the vehicle is in warranty, although some manufacturers extend coverage for a known problem.

To use one, look up your model and year with NHTSA or ask the service advisor for bulletins about the symptom. A bulletin number quoted on a repair order gives the shop a tested procedure and can support a goodwill request after warranty.

For scale, the median model year from 2018 to 2025 in our records has 3 recall campaigns and 44 owner complaints on file with NHTSA. Bulletins add a third, lower-key stream of known problems that the recall count alone does not show.

Sources: Wikipedia: Technical service bulletin; Capital One: Technical service bulletin vs recall