Service bulletin LSB005923

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)
Type	Service bulletin
NHTSA id	10247801
Published by NHTSA	2023-12-26
Manufacturer's number	LSB005923
Manufacturer's date	2023-11-08
NHTSA component	POWER TRAIN; ENGINE AND ENGINE COOLING

NHTSA's summary

TSB: Some 2023 model year RX 500h vehicles may exhibit a vibration or shudder sensation from the transmission in Drive and/or Reverse at speeds under 8mph (13kph). This condition is present only when the internal combustion engine is engaged. Follow the Repair Procedure in this bulletin to address this condition.

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

Engine, Transmission and driveline

Vehicles listed
LEXUS RX	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-SB-0033-24 Rev2	2026-07-08. Service bulletin. Some 2023 – 2024 model year RX 350, RX 350h, RX 500h, and 2024 model year TX 350 and TX 500h vehicles may exhibit a rotational clicking noise from one or both front drive shaft assemblies when accelerating while making turns. This condition may occur without a grease leak present on the front drive shaft assemblies. An updated front drive shaft assembly is available to resolve this condition. Follow the Repair Procedure in this bulletin to address this condition.
L-SB-0010-26	2026-05-08. Service bulletin. Some customers of 2023 – 2025 model year RX 350h, RX 500h, and 2024 – 2025 model year TX 500h vehicles may experience one or more of the following complaints when the low fuel level warning light illuminates: • The total amount of fuel dispensed during refueling is less than the customer expects when the fuel nozzle automatically clicks off, preventing the customer from being able to put as much fuel into the tank as expected. • The low fuel level warning light illuminates earlier than the customer expects. • The driving range is reduced compared to customers’ expectations, resulting in more frequent refueling than customers anticipate. The combination meter software logic has been updated to help meet customer expectations.
L-SB-0017-25 Rev2	2026-05-08. Service bulletin. OBSOLETE NOTICE April 17, 2026: This bulletin is now obsolete. Please see L-SB-0009-26
L-SB-0009-26	2026-05-08. Service bulletin. Some 2022 – 2024 model year NX 250 and NX 350, and 2023 – 2024 model year RX 350 vehiclesmay exhibit the following condition at vehicle startup when the vehicle is in Park: • A “Shift System Malfunction” message on the Multi-information Display (MID), as shown below. This condition is more likely to occur when the outside temperatures are near freezing. The Shift Actuator ECU logic has been modified to reduce the possibility of these conditions.
L-SB-0017-25 Rev2	2026-04-08. Service bulletin. Some 2022 – 2024 model year NX 250 and NX 350, and 2023 – 2024 model year RX 350 vehicles may exhibit both of the following conditions at vehicle startup when the vehicle is in Park: •A “Shift System Malfunction” message on the Multi-information Display (MID), as shown below. •Battery voltage drops below 10V. These conditions are more likely to occur when the outside temperatures are near freezing. The Shift Actuator ECU logic has been modified to reduce the possibility of these conditions.
L-SB-0033-24	2025-07-10. Service bulletin. Some 2023 – 2024 model year RX 350, RX 350h, RX 500h, and 2024 model year TX 350 and TX 500h vehicles may exhibit a rotational clicking noise from one or both front drive shaft assemblies when accelerating while making turns. This condition may occur without a grease leak present on the front drive shaft assemblies. An updated front drive shaft assembly is available to resolve this condition.
L-SB-0017-25	2025-04-08. Service bulletin. Some 2022 – 2024 model year NX 250 and NX 350, and 2023 – 2024 model year RX 350 vehicles may exhibit both of the following conditions at vehicle startup: •A “Shift System Malfunction” message on the Multi-information Display (MID), as shown below. •Battery voltage drops below 10V. These conditions are more likely to occur when the outside temperatures are near freezing. The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of these conditions.
L-SB-0017-25	2025-03-11. Service bulletin. Some 2022 – 2024 model year NX 250 and NX 350, and 2023 – 2024 model year RX 350 vehicles may exhibit both of the following conditions at vehicle startup: •A “Shift System Malfunction” message on the Multi-information Display (MID), as shown below. •Battery voltage drops below 10V. These conditions are more likely to occur when the outside temperatures are near freezing. The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of these conditions.
L-TT-0336-24 Rev1	2024-12-07. Service bulletin. After jump-starting, the vehicle may experience a no-start condition and multiple DTCs including U010087 - Lost Communication with ECM/PCM "A" Missing Message. Upon investigation, it is found that the engine ECU has been damage and needs to be replaced. In several cases, the cause of the ECU damage was improper jump starting. Further investigation found that ECU damage may occur if the negative (ground) cable clamps are attached on or around the engine ECU or mounting bracket. To prevent this condition from occurring, it is recommended that the jumper cables be attached as described in the owner’s manual.
L-SB-0033-24	2024-11-06. Service bulletin. Some 2023 – 2024 RX 350, RX 350h, and 2024 TX 350 vehicles may exhibit a rotational clicking noise from one or both front drive shaft assemblies when accelerating while making turns. This condition may occur without a grease leak present on the front drive shaft assemblies. An updated front drive shaft assembly is available to resolve this condition.