Nissan bulletin NTB22-073B
What it saysRear automatic braking warning light illuminated and/or DTC C1B56-04 and/or C1B56-97 stored in the adas control unit 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 electrical system. It names 4 model years (2019–2022). 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.
REAR AUTOMATIC BRAKING WARNING LIGHT ILLUMINATED AND/OR DTC C1B56-04 AND/OR C1B56-97 STORED IN THE ADAS CONTROL UNIT 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 |
|---|---|---|---|---|
| NTB22-073B | Service bulletin | May 11, 2024 | 11004972 | PDF, 1,002 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 themAlso filed against model years this site has no page for: 2022 Nissan Redundant Altima.
A 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 466 complaints with NHTSA since 2015. 123 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.
On the 2019 Nissan Altima, the 13 owners who gave an odometer reading for Electrical System reported it at a median of 21,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
Parked the car for roughly 10 minutes. Came back and started car with all lights on dash illuminated. Hard to drive, hard to steer and could not tell how fast vehicle was moving as speedometer didn't work. This has happened before, had it taken to Nissan dealer.
2020 Nissan Altima · Electrical System · filed with NHTSA Apr 18, 2021 · ODI 11412753
3out of 4 door lock actuators went out .three of the doors can’t be locked from driver side and don’t automatically lock when the car is being driven.problem has been confirmed by an independent center.there were no prior warnings
2021 Nissan Altima · Electrical System · filed with NHTSA Nov 20, 2023 · ODI 11556162
Back seat doors do not lock when pressing the automatic lock button located on the inside of the doors, and when pressing the lock button on the remote key. Vehicle was stationary
2019 Nissan Altima · Electrical System · filed with NHTSA Dec 20, 2019 · ODI 11290403
In depth: 2019 Nissan Altima electrical 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 electrical system
Source: same model, same component group18 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… |
| 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. |
| NTB21-115B | Service bulletin | Jul 11, 2024 | FALSE ACTIVATION OF AEB OR FCW APPLIED VEHICLES: 2021-2022 Altima (L34) 2022-2023 Frontier (D41) 2020-2022 Sentra (B18) APPLIED DATES: Altim… |
| NTB17-127C | Service bulletin | May 21, 2024 | INTELLIGENT KEY INITIALIZATION PROCEDURE STOPS OR WILL NOT CONTINUE This bulletin has been amended. See AMENDMENT HISTORY on the last page.… |
| NTB13-107G | Service bulletin | May 21, 2024 | VEHICLE KEY NOT DETECTED / AUTHENTICATED, ENGINE WILL NOT START This bulletin has been amended. See AMENDMENT HISTORY on the last page. Plea… |
| NTB13-027D | Service bulletin | May 21, 2024 | CAN COMMUNICATION – NETWORK DIAGNOSTIC FLOW CHART This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard pre… |
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 NTB22-073B 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 NTB22-073B 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 NTB22-073B cover?
The manufacturer filed it against 4 model years: 2021 Nissan Altima, 2020 Nissan Altima, 2019 Nissan Altima, 2022 Nissan Redundant Altima. 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 18 Jul 2022 — the build date is on the certification label in the driver’s door jamb.