Infiniti bulletin ITB21-021A
Infiniti filed this with NHTSA as a service bulletin dated Oct 6, 2025, received Oct 21, 2025, about the structure. 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.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationIF YOU CONFIRM The client states that either the rear hatch is inoperative, or the rear hatch closes after opening only a small amount, AND DTC B2426-23 for “SPINDLE SENSOR LH� and/or DTC B2427-23 for “SPINDLE SENSOR RH� is stored, AND/OR There is a growling type noise from the rear hatch area when opening/closing the rear hatch. · DTC B2426-23 for “SPINDLE SENSOR LH� and/or DTC B2427-23 for “SPINDLE SENSOR RH� may also be stored. HINT: If any DTC other than B2426-23 and/or B2427-23 is stored, this bulletin does not apply. ACTION Replace ONLY the spindle unit that is confirmed to be setting one of the DTCs listed above and/or causing the growling noise. Do NOT replace both spindle units when diagnosis leads to replacement of only one. HINT: Rear hatch spindle units are not hydraulic systems. If a rear hatch spindle unit appears to be leaking, this is normal drainage of water (rain, car wash, condensation) and design intended water management. Do not replace spindle units for suspected leaking. 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 |
|---|---|---|---|
| ITB21-021A | Service bulletin | Oct 6, 2025 | 11024397 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5; the full text comes from the manufacturer or a dealer. 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. Quote it 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.
Common questions
Source: NHTSA, 49 CFR 579.5Is Infiniti ITB21-021A 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 ITB21-021A 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 ITB21-021A cover?
The manufacturer filed it against 4 model years: 2021 Infiniti QX50, 2020 Infiniti QX50, 2019 Infiniti QX50, 2022 Infiniti QX55. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.