Lexus bulletin L-SB-0011-26
What it saysA 12V auxiliary battery with increased capacity has been released as an optional replacement. NHTSA’s full summary ↓
Lexus filed this with NHTSA as a service bulletin dated May 7, 2026, received Jun 4, 2026, about the electrical system. It names 4 model years (2023–2026). 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 communicationA 12V auxiliary battery with increased capacity has been released as an optional replacement.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| L-SB-0011-26 | Service bulletin | May 7, 2026 | 11033405 |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 28800-0P042 | — | — | |
| 00544-MFH60 | Battery, 12V Auxiliary | 1 | eBay Motors → |
| 28800-31453 | — | — |
Read by machine from the document NHTSA serves (6 pages), read Sep 29, 2026. A part number is shown only where it matches Lexus’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 4 model years this bulletin names have filed 164 complaints with NHTSA since 2015. 46 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.
(1)The original 12-V battery was replaced by the dealership on XXX (after 5-week and 120-mile usage) with a new one, model: 00544-MFH50, S/N , 540CCA and 100 RC. (2)Upon double-checking with the 2026 Lexus Owner’s Manual for RX450H+, on Page 605, it clearly stated that when replacing the battery, its case size should be the same as the…
2026 Lexus RX · Electrical System · filed with NHTSA Sep 14, 2026 · ODI 11764261
The contact owns a 2025 Lexus RX350. The contact stated that while driving at an undisclosed speed, the vehicle suddenly stopped and the "BRAKE" warning light was illuminated with the accelerator pedal depressed. The vehicle was taken to the dealer, where it was diagnosed as not having a malfunction in the collision avoidance system.
2025 Lexus RX · Electrical System · filed with NHTSA Oct 26, 2026 · ODI 11773747
On at least 7 occasions the driver was TRAPPED inside the vehicle. The car failed to start and the doors and windows locked. If the driver had not had a cell phone to make an emergency call he would have been locked inside until someone discovered the problem.
2023 Lexus RX · Electrical System · filed with NHTSA Dec 26, 2025 · ODI 11707085
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 group47 other manufacturer communications filed against the Lexus RX 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… |
| 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-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-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-SB-0024-25 | Service bulletin | Apr 18, 2025 | Some 2023 – 2025 model year RX 350, RX 350h, RX 500h, and 2024 – 2025 model year TX 350, TX 500h, and TX 550h+ vehicles may exhibit a condit… |
| 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… |
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-0011-26 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-0011-26 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-0011-26 cover?
The manufacturer filed it against 4 model years: 2026 Lexus RX, 2025 Lexus RX, 2024 Lexus RX, 2023 Lexus RX. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.