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August 15, 2025 Service bulletin

Customers state Parking Brake efficiency concerns

Lexus technical service bulletin L-TT-0348-25 for 2020-2023 Lexus GX.

Bulletin number
L-TT-0348-25 (L-TT-0348-25)
Component
Service brakes
Summary
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]

Owners of these vehicles have filed 6 complaints in the brakes category.

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