Lexus bulletin L-SB-0021-23
What it saysSome 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. NHTSA’s full summary ↓
Lexus filed this with NHTSA as a service bulletin dated Apr 18, 2024, received Apr 17, 2023, about the electrical system — 3 documents under this number: L-SB-0021-23 Rev1 (2 filings) and 1 more. It names 13 model years (2022–2024). 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 communicationSome 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.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| L-SB-0021-23 Rev1 | Service bulletin | Apr 18, 2024 | 11003639 | |
| L-SB-0021-23 Rev1 | Service bulletin | Apr 18, 2024 | 11003584 | |
| L-SB-0021-23 | Service bulletin | Mar 15, 2023 | 10234326 | 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.
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 13 model years this bulletin names have filed 332 complaints with NHTSA since 2015. 130 of them name Electrical System, Engine — 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.
Lexus LX 600 2024 While driving the cars the main monitor screen which displays important information, a splash screen pops up asking for a 6 DIGIT PIN # and obscure the information beneath it. This totally takes you out of the GPS app. Loss of the GPS app while driving in a full freeway in busy traffic is potentially life threatening.
2024 Lexus LX · Electrical System · filed with NHTSA May 18, 2026 · ODI 11738643
my vehicle was boought back under the California lemon lawyer today. It had repeated electrical failures in which the 12 V battery would fail. Lexus was never able to find out why but one occasion I could not exit the vehicle through the driver front door because the electrical and the backup mechanical did not work I exited thru the…
2022 Lexus NX · Electrical System · filed with NHTSA Oct 13, 2026 · ODI 11770939
The contact owns a 2022 Lexus LX 600. The contact received notification of NHTSA Campaign Number: 24V381000 (Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was contacted.
2022 Lexus LX · Engine · filed with NHTSA Jul 17, 2025 · ODI 11674218
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 group70 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 |
|---|---|---|---|
| 23LD04 | Service campaign | Jul 2, 2026 | DP: 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 inte… |
| L-SB-0011-26 | Service bulletin | May 7, 2026 | A 12V auxiliary battery with increased capacity has been released as an optional replacement. |
| 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… |
| 25LD01 | Service campaign | Nov 13, 2025 | 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, wat… |
| 23LE05 | Service campaign | Sep 26, 2025 | Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Lexus New Vehicle Limited Warranty for 4 years or 50,00… |
| 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… |
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-0021-23 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-0021-23 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-0021-23 cover?
The manufacturer filed it against 13 model years: 2024 Lexus GX, 2023 Lexus LS, 2024 Lexus LX, 2023 Lexus LX, 2022 Lexus LX, 2024 Lexus NX and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.