# Service bulletin L\-SB\-0021\-23 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.

- Type: Service bulletin
- NHTSA id: 11003584
- Published by NHTSA: 2024\-07\-06
- Manufacturer's number: L\-SB\-0021\-23 Rev1
- Manufacturer's date: 2024\-04\-18
- Campaign id or software version: L\-SB\-0021\-23
- NHTSA component: ENGINE; ELECTRICAL SYSTEM

## NHTSA's summary

Some 2022 – 2024 model year Lexus vehicles may require the download and installation of vehicle specific software or configuration software when the Electronic Control Unit \(ECU\) is replaced. GTS\+ software has been modified to indicate when configuration software is required. A new Configure column has been added to the GTS\+ Health Check Results screen to show when configuration software is available for a specific ECU. REVISION NOTICE April 18, 2024 Rev1: •Applicability has been updated to include 2024 model year GX 550, LX 600, NX 250, NX 350, NX 350h, NX 450h\+, RX 350, RX 350h, RX 450h\+, RX 500h, RZ 300e, RZ 450e, TX 350, TX 500h, and TX 550h\+ vehicles. •The Introduction section has been updated. •The Operation Procedure section has been removed. •The Standard ECU Configuration Procedure and ECU Configuration Value Writing Procedure sections have been added.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11003584-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11003584-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Engine

## Vehicles listed

- 2024 LEXUS GX
- 2022 to 2024 LEXUS LX
- 2022 to 2024 LEXUS NX
- 2022 to 2024 LEXUS NX HYBRID
- 2023 to 2024 LEXUS RX
- 2023 to 2024 LEXUS RX HYBRID
- 2023 to 2024 LEXUS RZ
- 2024 LEXUS TX
- 2024 LEXUS TX HYBRID

## Recalls for the same vehicles and component

- [26V341000](/recalls/nhtsa/26V341000.md), 2026-05-27: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [25V767000](/recalls/nhtsa/25V767000.md), 2025-11-06: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
- [25V595000](/recalls/nhtsa/25V595000.md), 2025-09-11: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [24V381000](/recalls/nhtsa/24V381000.md), 2024-05-30: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL

## Other bulletins for the same vehicles and component

- [L\-SB\-0013\-26 Rev1](/bulletins/11037200.md), 2026-09-09, Service bulletin: ENGINE. Some 2024 – 2026 model year GX 550 vehicles may exhibit a vibration at idle when in drive. The Engine Control Module \(ECM\) logic has been modified, in addition to improved exhaust hangers, to help improve this condition
- [23LD04](/bulletins/11036119.md), 2026-08-12, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL INSTRUCTIONS FOR 23LD04 GPS Antenna May Not Receive Power CERTAIN 2024 Model Year NX250, NX350, NX350H, and NX450H\+
- [23LD04](/bulletins/11036118.md), 2026-08-12, Service campaign: ELECTRICAL SYSTEM. The subject vehicles are equipped with a GPS antenna wire harness that will not allow the GPS to operate when the vehicle is off as intended. As a result, the vehicle location cannot be identified through stolen vehicle location services when the vehicle is off.
- [L\-SB\-0013\-26](/bulletins/11033419.md), 2026-06-04, Service bulletin: ENGINE. Some 2024 – 2026 model year GX 550 vehicles may exhibit a vibration at idle when in drive. The Engine Control Module \(ECM\) logic has been modified, in addition to improved exhaust hangers, to help improve this condition.
- [L\-SB\-0010\-26](/bulletins/11032485.md), 2026-05-08, Service bulletin: ENGINE. 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\-0021\-25](/bulletins/11031155.md), 2026-04-08, Service bulletin: ENGINE. OBSOLETE NOTICE February 27, 2026: This bulletin is no longer applicable and is now obsolete.
- [L\-TT\-0349\-26](/bulletins/11031152.md), 2026-04-08, Service bulletin: ENGINE. Some Customers for the listed vehicles may have complaint of the following: unable to charge the vehicle using the supplied level 1 or 2 charger. Additionally, most will indicate one or more of the LEDs on the charger will illuminate at the time of no charge. Charging at other stations is still possible.
- [L\-SB\-0021\-25](/bulletins/11029897.md), 2026-03-07, Service bulletin: ENGINE. OBSOLETE NOTICE February 27, 2026: This bulletin is no longer applicable and is now obsolete.
- [L\-SB\-0052\-25](/bulletins/11026321.md), 2025-12-05, Service bulletin: ENGINE. Some 2022 – 2025 model year NX 450h\+ and 2024 – 2025 RX 450h\+ vehicles may exhibit a MIL ON condition with Diagnostic Trouble Code \(DTC\) P019064 \(Fuel Rail Pressure Sensor “A” Signal Plausibility Failure\) present. The Engine Control Module \(ECM\) \(SAE term: Powertrain Control Module/PCM\) logic has been modified to address this condition.
- [25LD01](/bulletins/11026311.md), 2025-12-05, Service campaign: ELECTRICAL SYSTEM. The subject vehicles are equipped with a rear motor unit and an HV Floor Under Wire that provide high voltage to operate the motor. Mud, water, or road salt could potentially enter the HV Floor Under Wire connector housing and could cause corrosion over time. Excessive corrosion could cause AM Radio Static during certain driving cycles, or the vehicle may not start.

JSON: [/v1/bulletins/11003584](/v1/bulletins/11003584)

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