Acura bulletin BTI&04162025902
What it saysDealer Message - American Honda Motor Co., Inc. NHTSA’s full summary ↓
Acura filed this with NHTSA as a manufacturer communication dated Apr 16, 2025, received Apr 29, 2025, about the engine. It names 2 model years (2023). A manufacturer communication 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 communicationDealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2023 RDXs and TLXs with a client complaint of the "Emissions System Warning" Malfunction Indicator Light (MIL) on with DTC P2101 (Electronic Throttle Control System Malfunction) stored. Client may experience the vehicle going into "limp" mode. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to your attempting a repair of any kind.
Trouble codes it names: P2101
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| BTI&04162025902 | Other | Apr 16, 2025 | 11017328 | PDF, 50 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 2 model years this bulletin names have filed 44 complaints with NHTSA since 2015. 4 of them name 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.
On October 31, 2024, I was nearing the end of a three hour trip. I was traveling on a rural two-lane highway with a 55 mph speed limit. I had just pulled away from a 4-way stop intersection and was following a single vehicle traveling 40 mph.
2023 Acura RDX · Engine · filed with NHTSA Nov 13, 2024 · ODI 11624887
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 engine
Source: same model, same component group20 other manufacturer communications filed against these Acura models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Acura list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| B25-049 | Service bulletin | Sep 17, 2025 | Service Bulletin - Oil leak at the cam chain tensioner inspection cover due to and insufficient sealant adhesion on the inspection cover. |
| B25-048 | Service bulletin | Sep 17, 2025 | Service Bulletin - Oil leak at the cam chain tensioner inspection cover due to and insufficient sealant adhesion on the inspection cover. |
| BPS&08122025901 | Other | Aug 12, 2025 | Dealer Message - Acura is also implementing an additional (1) twenty-four (24) month period for 2015 model year Acura TLX vehicles, commenci… |
| B22-009 | Service bulletin | Jul 7, 2025 | "Service bulletin - Under certain circumstances, after coming to a stop and engaging idle stop the vehicle may not restart automatically due… |
| BTI&04302025902 | Other | Apr 30, 2025 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2023 RDXs and TLXs with a client complaint of the "Emissions… |
| BEBM04182025901 | Other | Apr 18, 2025 | Dealer Message - Torque converters may not have been manufactured to proper specifications. As a result, the torque converter lock-up clutch… |
| B23-029 | Service bulletin | Apr 18, 2025 | Service Bulletin - The lock-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock up pis… |
| BTI&11132024902 | Other | Nov 13, 2024 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2023 RDXs and TLXs with a client complaint of the "Emissions… |
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 BTI&04162025902 a recall?
No. A manufacturer communication 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 BTI&04162025902 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 BTI&04162025902 cover?
The manufacturer filed it against 2 model years: 2023 Acura RDX, 2023 Acura TLX. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.