TSB vs Recall — they're not the same thing
A recall is a federally-mandated notification, issued under NHTSA authority, that the manufacturer must repair a safety-related defect at no cost to the consumer. Recalls are public, mandatory, and don't expire based on warranty period.
A TSB is internal — issued by the manufacturer to dealers, describing how to diagnose and repair a known issue. TSBs are NOT mandatory repairs for the consumer's benefit; they're guidance for technicians. TSBs are typically available only inside warranty period (the manufacturer won't pay for the TSB-described repair if your warranty has expired).
Both matter for lemon-law cases. Recalls give you safety leverage. TSBs give you a manufacturer admission that the defect exists and has a known repair procedure.
Why TSBs matter in lemon-law cases
A TSB is a manufacturer admission. When you sue (or send a demand letter) on a transmission defect that has a TSB describing the exact symptoms you're experiencing, you've effectively cited the manufacturer's own internal documentation in your complaint.
Three uses in lemon-law cases:
1. Demand-letter leverage. 'Your TSB #19-NA-126 dated March 2024 describes the exact defect we're complaining about — including the recommended repair, which the dealer has performed twice without success.'
2. Discovery in litigation. Federal court discovery can require the manufacturer to produce all TSBs related to the defect class. Patterns emerge.
3. Refutes 'unique to your vehicle' arguments. Manufacturers often defend by claiming the consumer's vehicle is unique. The TSB proves otherwise.
How to find TSBs for your vehicle
NHTSA's database includes TSBs alongside recalls. Go to nhtsa.gov, search by year/make/model, and click through to the 'TSBs' tab. Each TSB lists the affected vehicles, the symptom, and the recommended repair.
AllData and Mitchell1 are subscription services that index TSBs by VIN — your dealer's service department uses these. Some dealers will print TSBs for you if you ask; others won't. Either way, you can find the TSB number through NHTSA's free database.
Once you have a TSB number, search '[manufacturer] TSB [number] PDF' — the full TSB text is often available online.
Common TSB-driven lemon-law cases
Honda 1.5L turbo oil dilution — Honda issued a TSB describing the fuel-in-oil mixing issue and a software update; the TSB became central evidence in the resulting MMWA litigation.
Hyundai-Kia Theta II engine — multiple TSBs over years describing rod-bearing failures and engine seizures before NHTSA finally forced a recall.
Ford 10-speed transmission shudder — TSBs describing the shudder and software-update repairs that often don't fix the issue. Read about transmission defects.
Tesla Autopilot phantom braking — internal Tesla service bulletins (analogous to TSBs) describing the issue, which surfaced in MMWA discovery.
What to do when you find a TSB matching your defect
Save the TSB number and date. Print or screenshot the TSB description. Add both to your case file alongside your repair orders.
Reference the TSB in your Final Repair Attempt letter. Generate an FRA letter citing the TSB as evidence of a documented defect class.
When you talk to a lemon-law attorney, lead with the TSB. It signals you've done your research and have evidence the manufacturer would prefer not to discuss.
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