TSB T-TT-0788-25 — Toyota Service bulletin
T-TT-0788-25 is a service bulletin on file with NHTSA for the Toyota 4Runner, 2023–2024 model years, filed and re-filed as 2 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. Customers state Parking Brake efficiency concerns. The conditions can include the following: • The Parking Brake Pedal feels loose or requires full depression for proper engagement. • When not fully depressed, effectiveness on steep surfaces may be reduced, allowing the vehicle…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years T-TT-0788-25 names
| Vehicle | Model years |
|---|---|
| Toyota 4Runner | 2023, 2024 |
Every document filed under T-TT-0788-25
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| T-TT-0788-25 Rev1 | January 30, 2026 | Service bulletin |
| T-TT-0788-25 | August 15, 2025 | Service bulletin |
What T-TT-0788-25 covers
Brakes & stability — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB T-TT-0788-25?
T-TT-0788-25 is a service bulletin filed with NHTSA by Toyota, covering the Toyota 4Runner across the 2023–2024 model years. NHTSA's summary reads: Customers state Parking Brake efficiency concerns. The conditions can include the following: • The Parking Brake Pedal feels loose or requires full depression for proper engagement. • When not fully depressed, effectiveness on steep surfaces may be reduced, allowing the vehicle…
Which vehicles does T-TT-0788-25 cover?
NHTSA's file names Toyota 4Runner (2023–2024). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB T-TT-0788-25 a recall, and is the repair free?
No. T-TT-0788-25 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of T-TT-0788-25?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under T-TT-0788-25, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under T-TT-0788-25. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.