Nissan bulletin NTB21-115B
What it saysFALSE ACTIVATION OF AEB OR FCW APPLIED VEHICLES: 2021-2022 Altima (L34) 2022-2023 Frontier (D41) 2020-2022 Sentra (B18) APPLIED DATES: Altima: All Frontier: All Sentra: Built on or before March 10, 2022 APPLIED SYSTEMS… NHTSA’s full summary ↓
Nissan filed this with NHTSA as a service bulletin dated Jul 11, 2024, received Sep 4, 2024, about the electrical system. It names 7 model years (2020–2023). 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 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 APPLIED VEHICLES: 2021-2022 Altima (L34) 2022-2023 Frontier (D41) 2020-2022 Sentra (B18) APPLIED DATES: Altima: All Frontier: All Sentra: Built on or before March 10, 2022 APPLIED SYSTEMS: Automatic Emergency Braking/Forward Collision Warning IF YOU CONFIRM The customer states they have experienced false activation and/or unexpected braking of the Automatic Emergency Braking (AEB) or Forward Collision Warning (FCW) system, AND There are no related DTCs stored. ACTION 1. Confirm the current ICC/ADAS 2 part number. 2. Reprogram the ICC/ADAS 2, if applicable. IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to successfully completing this repair.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| NTB21-115B | Service bulletin | Jul 11, 2024 | 11006996 | PDF, 881 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 7 model years this bulletin names have filed 701 complaints with NHTSA since 2015. 197 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.
This first appeared on or about 7/2/24. Saw dealership on 7/9/2024. First driving the cruise control failed and showed malfunction. The next morning truck started but numerous things didn’t work like Radio and rear emergency braking. Rear braking was a Malfunction. Also trip A/B were erased.on 7/9/24.
2023 Nissan Frontier · Electrical System · filed with NHTSA Jul 17, 2024 · ODI 11602901
Headlights dim when pressing the accelerator, brighten when releasing pressure on the accelerator. The problem has been continuous since purchasing the vehicle five months ago. The vehicle was inspected by the dealership service department, which advised they observed no issue
2022 Nissan Sentra · Electrical System · filed with NHTSA May 20, 2023 · ODI 11523013
The contact owns a 2022 Nissan Frontier. The contact stated that while driving approximately 55 MPH, the Forward Collision Avoidance system suddenly activated causing the vehicle to abruptly stop although no other vehicles or objects were nearby.
2022 Nissan Frontier · Electrical System · filed with NHTSA Aug 22, 2022 · ODI 11480478
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 group37 other manufacturer communications filed against these Nissan models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Nissan list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| NTB15-049CC | Service bulletin | Mar 30, 2026 | TELEMATICS SERVICE INFORMATION HINT: This bulletin applies to vehicles equipped with a 4G network compatible TCU. TCUs compatible with 3G ne… |
| NTB19-042F | Service bulletin | Feb 20, 2025 | AUTOMATIC EMERGENCY BRAKING WARNING LIGHT BLINKING APPLIED SYSTEMS: Vehicles equipped with a lane camera (see Figure 1) SERVICE INFORMATION… |
| PD124 | Service bulletin | Aug 30, 2024 | *****Dealer Announcement***** To ensure continued customer satisfaction and confidence, Nissan is now updating the temporary hold on specifi… |
| NTB22-103B | Service bulletin | Aug 15, 2024 | INFOTAINMENT CONTROL UNIT REPLACEMENT SERVICE INFORMATION APPLIED VEHICLES: 2021-2024 Armada (Y62) 2022-2024 Frontier (D41) – Pro-X and Pro… |
| NTB22-027B | Service bulletin | Aug 15, 2024 | DTC B2E01-96 (INTERNAL BATTERY) STORED AS CURRENT IN IVC This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please disc… |
| NTB21-037D | Service bulletin | Aug 15, 2024 | DTCS B2E4B-06, B2E60-06, B2E61-06 DISPLAYED AS CRNT IN THE TCU This bulletin has been amended. See AMENDMENT HISTORY on the last page. Pleas… |
| NTB20-085C | Service bulletin | Aug 15, 2024 | TELEMATICS CONTROL UNIT RESET AFTER AUTOMATIC COLLISION NOTIFICATION This bulletin has been amended. See AMENDMENT HISTORY on the last page.… |
| NTB20-075E | Service bulletin | Aug 15, 2024 | SOFTWARE UPDATE POP-UP NOTIFICATION This bulletin is no longer active. Please discard previous versions of NTB20-075. |
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 NTB21-115B 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 NTB21-115B 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 NTB21-115B cover?
The manufacturer filed it against 7 model years: 2022 Nissan Altima, 2021 Nissan Altima, 2023 Nissan Frontier, 2022 Nissan Frontier, 2022 Nissan Sentra, 2021 Nissan Sentra and more. 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.