Nissan bulletin NTB21-115A
What it saysFALSE ACTIVATION OF AEB OR FCW This bulletin has been amended. NHTSA’s full summary ↓
Nissan filed this with NHTSA as a service bulletin dated May 11, 2024, received Jul 19, 2024, about the forward collision avoidance. It names 2 model years (2020–2021). 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 communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
FALSE ACTIVATION OF AEB OR FCW This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| NTB21-115A | Service bulletin | May 11, 2024 | 11004970 | PDF, 992 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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
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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 340 complaints with NHTSA since 2015. 206 of them name Forward Collision Avoidance, 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.
On the 2020 Nissan Sentra, the 14 owners who gave an odometer reading for Forward Collision Avoidance reported it at a median of 6,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The contact owns a 2021 Nissan Sentra. The contact stated that while driving approximately 30 MPH, the instrument panel went black. An unknown warning light then displayed and the vehicle abruptly stopped in the middle of the road. Immediately after the failure, the vehicle started driving as intended.
2021 Nissan Sentra · Forward Collision Avoidance · filed with NHTSA Mar 8, 2022 · ODI 11455649
Purchased car in 2020 and within a couple of weeks of purchase I was thrown on brakes warnings flashing that there was an obstruction. This happened in the middle of traffic and I was almost hit. I returned the car and was told because they could not mimic what happened with me there as nothing wrong.
2020 Nissan Sentra · Forward Collision Avoidance · filed with NHTSA Jul 13, 2021 · ODI 11424619
Vehicle delivered with 220 miles from dealer at 5:30pm. Awoke following morning and it registered 221 miles. Vehicle was kept in locked garage overnight and never driven
2020 Nissan Sentra · Electrical System · filed with NHTSA Mar 31, 2021 · ODI 11405724
In depth: 2020 Nissan Sentra automatic emergency braking problems →
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 forward collision avoidance
Source: same model, same component group2 other manufacturer communications filed against the Nissan Sentra under the same component group (forward collision avoidance), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| NTB19-033G | Service bulletin | Feb 20, 2025 | INTELLIGENT CRUISE CONTROL INOPERATIVE AND AEB/FEB WARNING LIGHT ON OR RADAR OBSTRUCTION MESSAGE DISPLAYED WITH DTC C1A16 OR C2582 IF YOU CO… |
| NTB19-042E | Service bulletin | Apr 13, 2024 | AUTOMATIC EMERGENCY BRAKING WARNING LIGHT BLINKING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard pr… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Nissan, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Nissan NTB21-115A 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 NTB21-115A 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.
Which vehicles does NTB21-115A cover?
The manufacturer filed it against 2 model years: 2021 Nissan Sentra, 2020 Nissan Sentra. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: built on or before 10 Mar 2022 — the build date is on the certification label in the driver’s door jamb.