Service bulletins for the 2024 Lexus GX
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.
55 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Transmission and driveline are shown. Show all
| L-SB-0042-25 Rev2 | 2026-06-04. Service bulletin. POWER TRAIN. Some 2024 – 2025 model year GX 550 vehicles may exhibit a harsh downshift (2 – 1) when slowing to a stop. The Electronic Controlled Transmission (ECT) ECU logic has been modified to address this condition. |
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| L-SB-0042-25 Rev1 | 2026-03-07. Service bulletin. POWER TRAIN. Some 2024 – 2025 model year GX 550 vehicles may exhibit a harsh downshift (2 – 1) when slowing to a stop. The Electronic Controlled Transmission (ECT) ECU logic has been modified to address this condition. |
| L-SB-0042-25 | 2025-10-08. Service bulletin. POWER TRAIN. Some 2024 – 2025 model year GX 550 vehicles may exhibit a harsh downshift (2 – 1) when slowing to a stop. The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to address this condition |
| L-SB-0031-25 | 2025-08-08. Service bulletin. POWER TRAIN. Some 2024-2025 model year GX550 vehicles may exhibit a harsh downshift when slowing to a stop. The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to address these conditions. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.