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Service bulletin L-TT-0348-25 Rev1

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11028724
Published by NHTSA2026-02-11
Manufacturer's numberL-TT-0348-25 Rev1
Manufacturer's date2026-01-30
Campaign id or software versionL-TT-0348-25 Rev1
NHTSA componentSERVICE BRAKES

NHTSA's summary

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 to roll with transmission in Neutral. • When not fully depressed, effectiveness on steep surfaces may be reduced, allowing the vehicle to roll slightly with transmission in Park.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes

Vehicles listed
LEXUS GX2020, 2021, 2022, 2023

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
L-TT-0348-252025-09-09. Service bulletin. Customers state Parking Brake efficiency concerns. The conditions can include the following: • The PKB Pedal feels loose or requires full depression for proper engagement. • Ineffective on steep surfaces, allowing the vehicle to roll with transmission in Neutral. • Ineffective on steep surfaces, allowing the vehicle to roll slightly with transmission in Park. [Transmission Dependency]