Acura bulletin B23100A
What it saysThe vehicle's brakes may exhibit a groan, squeal, or squeak noise, most commonly after the vehicle sits for a prolonged period and the brakes are cold. NHTSA’s full summary ↓
Acura filed this with NHTSA as a service bulletin dated Oct 11, 2023, received Oct 20, 2023, about the service brakes. It names 3 model years (2021–2023). 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 communicationService Bulletin - The vehicle's brakes may exhibit a groan, squeal, or squeak noise, most commonly after the vehicle sits for a prolonged period and the brakes are cold. This noise will typically disappear after the first few brake applications.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| B23100A | Service bulletin | Oct 11, 2023 | 10244255 | PDF, 73 KB |
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 3 model years this bulletin names have filed 159 complaints with NHTSA since 2015. 13 of them name Service Brakes — 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.
Loss of brake power with “brake” light and “brake service” light on. I was backing out of my driveway and lost almost all braking power almost pushing the pedal to the floor. Once I came to a stop, I turned the car off and turned it back on, brake pedal felt fine and lights went away at that point
2022 Acura TLX · Service Brakes · filed with NHTSA Dec 21, 2025 · ODI 11706420
I had an awful noise that accompanied a sticky/ inconsistent brake pedal feel and braking concerns. Upon contacting multiple dealerships and honda corporate is was told everything is working as designed. I filed a claim with NCDS and was awarded a repair.
2023 Acura TLX · Service Brakes · filed with NHTSA Jul 8, 2025 · ODI 11671984
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 service brakes
Source: same model, same component group5 other manufacturer communications filed against the Acura TLX under the same component group (service brakes), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| BTI&08282023904 | Service bulletin | Aug 28, 2023 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2023 TLX Type Sâs with a client complaint of a front b… |
| BTI&08142023901 | Service bulletin | Aug 14, 2023 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2023 TLX Type Sâs with a client complaint of a front b… |
| BTI&07272023903 | Service bulletin | Jul 27, 2023 | Dealer Message -American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2023 TLX Type Sâs with a client complaint of a front br… |
| BTI&06152023901 | Service bulletin | Jun 15, 2023 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2023 TLX Type S's with a client complaint of a front bra… |
| BTI&06012023904 | Service bulletin | Jun 1, 2023 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2021-2023 TLX Type S's with a client complaint of a front bra… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Acura, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Acura B23100A 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 B23100A 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 Honda warranty extension on file lists the ones Honda has filed.
Which vehicles does B23100A cover?
The manufacturer filed it against 3 model years: 2023 Acura TLX, 2022 Acura TLX, 2021 Acura TLX. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.