Lexus bulletin L-SB-0034-23
What it saysTSB: Some 2023 model year ES 250, ES 300h, ES 350, and UX 250h vehicles with DCM firmware version earlier than LG-N210ee9999-09 may exhibit a condition in which the vehicle customize settings menu is unavailable… NHTSA’s full summary ↓
Lexus filed this with NHTSA as a service bulletin dated May 19, 2023, received Jun 26, 2023, about the electrical system. It names 2 model years (2023). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationTSB: Some 2023 model year ES 250, ES 300h, ES 350, and UX 250h vehicles with DCM firmware version earlier than LG-N210ee9999-09 may exhibit a condition in which the vehicle customize settings menu is unavailable in the head unit after connecting to Techstream. A DCM firmware update is now available to address this condition. Follow the DCM Firmware Update Procedure in this bulletin to update the firmware.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| L-SB-0034-23 | Service bulletin | May 19, 2023 | 10238145 | not found |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
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Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 2 model years this bulletin names have filed 13 complaints with NHTSA since 2015. 3 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
The contact owns a 2023 Lexus ES 250. The contact stated that while driving approximately 40 MPH, the vehicle abruptly stalled. During the failure, the vehicle lost power brakes and power steering functionality, with the messages "High Power Consumption Temporarily Limited", "Braking Temporarily Disabled", and "Power Steering Temporarily…
2023 Lexus ES · Electrical System · filed with NHTSA Feb 17, 2026 · ODI 11718537
All doors were closed and no warnings on the dash before I started driving and I made sure kids lock was engaged by checking the door lock status inside the vehicle because I had two kids sitting on the back seat with car seat installed.
2023 Lexus UX · Electrical System · filed with NHTSA Jul 1, 2023 · ODI 11529937
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the electrical system
Source: same model, same component group32 other manufacturer communications filed against these Lexus models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Lexus list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| L-SB-0057-22 OBSOLETE | Service bulletin | Feb 2, 2026 | OBSOLETE NOTICE February 2, 2026: This bulletin is now obsolete. Please see L-SB-0004-26. |
| L-SB-0004-26 | Service bulletin | Jan 23, 2026 | Some 2018 – 2025 model year Lexus vehicles equipped with the Enform™ 2.0 Navigation System, require a Special Service Tool (SST) USB flash d… |
| L-SB-0039-25 | Service bulletin | Sep 9, 2025 | A new head unit software update is available for 2023 – 2024 model year ES 250, ES 300h, ES 350, LS 500h, and UX 250h; 2023 model year LS 50… |
| L-TT-0326-23 REV2 | Service bulletin | Aug 19, 2025 | Some customers may experience operational difficulties with some telematics features which they cannot resolve on their own. These resources… |
| L-SB-0009-24 REV1 | Service bulletin | Jun 25, 2025 | Some 2021 – 2024 model year ES 250 and 2022 – 2024 model year NX 250 vehicles with A25A-FKS engines may have a MIL ON condition with one or… |
| L-SB-0043-23 REV1 | Service bulletin | Jun 13, 2025 | The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The… |
| L-TT-0341-25 | Service bulletin | Apr 2, 2025 | To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. T… |
| L-TT-0340-25 | Service bulletin | Apr 2, 2025 | To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. T… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Lexus, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Lexus L-SB-0034-23 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the L-SB-0034-23 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every Toyota warranty extension on file lists the ones Toyota has filed.
Which vehicles does L-SB-0034-23 cover?
The manufacturer filed it against 2 model years: 2023 Lexus ES, 2023 Lexus UX. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.