Infiniti bulletin ITB20-025C
What it saysDTC B2724-23 and/or C1B56-04 stored, and/or RAB error message or warning this bulletin has been amended. NHTSA’s full summary ↓
Infiniti filed this with NHTSA as a service bulletin dated May 15, 2024, received Jul 19, 2024, about the electrical system. 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.
DTC B2724-23 AND/OR C1B56-04 STORED, AND/OR RAB ERROR MESSAGE OR WARNING 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 |
|---|---|---|---|---|
| ITB20-025C | Service bulletin | May 15, 2024 | 11004955 | PDF, 1,101 KB |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 28538-5NY0A | — | — |
Read by machine from the document NHTSA serves (26 pages), read Sep 30, 2026. A part number is shown only where it matches Infiniti’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 74 complaints with NHTSA since 2015. 12 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.
Around 530pm At the corner of Briarcliff Rd NE Atlanta Ga and N Druid Hills Rd NE Atlanta GA As I was about to accelerate after the Red Light turned green, my car experienced a significant loss of power. Several warning lights came on, the engine light came on and a warning that said System Default came on.
2021 Infiniti QX50 · Electrical System · filed with NHTSA Dec 13, 2025 · ODI 11704901
Jan 25,2021 Highway 35 San Antonio Texas Display board lights turned off for a few seconds it made a click sound and the car turned off and turned back on for a few seconds, stalling the car. The automatic break was activated and deactivated at the same time. Trying to stop the car.
2020 Infiniti QX50 · Electrical System · filed with NHTSA Jan 26, 2022 · ODI 11448996
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 group17 other manufacturer communications filed against the Infiniti QX50 under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Infiniti list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| ITB22-025D | Service bulletin | Aug 26, 2026 | ROARING NOISE FROM THE ENGINE COOLING FAN ASSEMBLY AND THE A/C IS NOT COOLING IF YOU CONFIRM A roaring noise from the engine cooling fan ass… |
| ITB12-011R | Service bulletin | Mar 30, 2026 | TELEMATICS SERVICE INFORMATION See ITB19-029 for models built after those listed above for a different Service Procedure. SERVICE INFORMATIO… |
| AN23-005B | Service bulletin | Aug 15, 2024 | TELEMATICS CONTROL UNIT RESET AFTER AUTOMATIC COLLISION NOTIFICATION SERVICE INFORMATION The Telematics Control Unit (TCU) has the ability t… |
| AN22-007B | Service bulletin | Aug 15, 2024 | DTC B2E01-96 (INTERNAL BATTERY) STORED AS CURRENT IN IVC APPLIED SYSTEMS: Vehicles equipped with Telematics SERVICE INFORMATION CONSULT has… |
| AN19-059E | Service bulletin | Aug 15, 2024 | AV CONTROL UNIT REPLACEMENT PROCESS This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions… |
| AN19-045E | Service bulletin | Aug 15, 2024 | TELEMATICS (IVC) SERVICE INFORMATION Vehicles equipped with factory telematics system HINT: If the client experiences Wi-Fi hotspot relate… |
| ITB24-010 | Service bulletin | Jul 19, 2024 | FALSE ACTIVATION OF AEB OR FCW APPLIED VEHICLES: 2021-2022 QX50 (J55) APPLIED DATES: Built on or before August 08, 2022 APPLIED SYSTEMS: Onl… |
| ITB13-052E | Service bulletin | May 20, 2024 | INTELLIGENT KEY NOT DETECTED / ENGINE WILL NOT START This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Infiniti, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Infiniti ITB20-025C 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 ITB20-025C 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 ITB20-025C cover?
The manufacturer filed it against 2 model years: 2021 Infiniti QX50, 2020 Infiniti QX50. 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 8 Oct 2021 — the build date is on the certification label in the driver’s door jamb.