People often mix up recalls, TSBs and investigations. They’re related but distinct, and only one guarantees a free repair.
The short version. Recall = free safety fix. TSB = repair guidance (often warranty-only). Investigation = NHTSA is still looking. Check open recalls by VIN.
Side by side
| Recall | TSB | Investigation | |
|---|---|---|---|
| What it is | Mandated fix for a safety defect | Manufacturer repair guidance | NHTSA inquiry into a possible defect |
| Safety-related? | Yes, by definition | Not necessarily | Possibly — that’s what’s being decided |
| Cost to you | Free, no expiry on most | Usually free only under warranty | None yet |
| Triggers a repair? | Yes | Sometimes | Only if it becomes a recall |
| ID format | NHTSA campaign no. (e.g. 23V865000) | Manufacturer bulletin number | PE / EA / RQ number |
Recalls
A recall is issued when a manufacturer or NHTSA confirms a vehicle has a safety defect or fails a Federal Motor Vehicle Safety Standard. The remedy is free at a franchised dealer, and most safety recalls never expire. This is the only category that guarantees you a free fix — see what to do when your car is recalled.
Technical Service Bulletins (TSBs)
A TSB tells dealers how to diagnose and fix a known, recurring problem that isn’t a safety defect — say, a transmission shudder or an infotainment glitch. Because it isn’t a safety recall, the repair is usually only free if the vehicle is still under warranty.
Investigations
When NHTSA sees a pattern in complaints or crash data, it can open a Preliminary Evaluation (PE), which may escalate to an Engineering Analysis (EA). If a defect is confirmed, a recall follows; if not, the investigation closes. A high complaint count is sometimes what starts this.
Bottom line
Don’t assume a TSB or an open investigation means a free fix — only a recall does. Check your car’s open recalls by VIN, and learn the terms in the glossary.