# Service bulletin ITB21\-021

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10202233
- Published by NHTSA: 2021\-10\-13
- Manufacturer's number: ITB21\-021
- Manufacturer's date: 2021\-09\-14
- NHTSA component: STRUCTURE

## NHTSA's summary

REAR HATCH INOPERATIVE OR NOISE WHEN OPENING/CLOSING IF 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 SPINDLE SENSOR LH and/or DTC B2427\-23 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 SPINDLE SENSOR LH and/or DTC B2427\-23 SPINDLE SENSOR RH may also be stored. NOTE: 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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10202233-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10202233-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Body and frame

## Trouble codes named

B2426, B2427

## Vehicles listed

- 2019 to 2021 INFINITI QX50
- 2022 INFINITI QX55

## Other bulletins for the same vehicles and component

- [ITB09\-063C](/bulletins/11031720.md), 2026-04-29, Service bulletin: STRUCTURE:BODY. CERTIFICATION LABEL AND VIN PLATE REPLACEMENT SERVICE INFORMATION Because of collision damage or other vehicle repair, a replacement “Certification Label” or “VIN Plate/Label” may be needed. HINT: Certification Label = FMVSS \(Federal Motor Vehicle Safety Standards\) label. These items may be available from Infiniti by request if certain criteria are met. This bulletin lists the criteria and provides an application form for such replacements. · The “VIN Plate/Label” \(metal plate or vinyl label\) is attached to the instrument panel or body on the driver side at the base of the windshield \(see Figure 1\). · The “Certification Label” \(vinyl adhesive label\) is located on the lower area of the driver side B\-Pillar \(see Figure 1\).
- [ITB21\-021A](/bulletins/11024397.md), 2025-10-21, Service bulletin: STRUCTURE:BODY. IF 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.
- [ITB20\-006C](/bulletins/10232647.md), 2023-03-07, Service bulletin: VISIBILITY; STRUCTURE. WINDSHIELD WIPER BLADE PERFORMANCE/DIAGNOSIS SERVICE INFORMATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- [ITB13\-007H](/bulletins/10232646.md), 2023-03-07, Service bulletin: VISIBILITY; STRUCTURE. REMOVING FOREIGN MATERIAL FROM THE WINDOW GLASS This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- [ITB09\-039J](/bulletins/10232644.md), 2023-03-07, Service bulletin: VISIBILITY; STRUCTURE. WINDSHIELD CRACKING This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- [ITB23\-003](/bulletins/10231089.md), 2023-02-04, Service bulletin: STRUCTURE. NOISE FROM MOONROOF IF YOU CONFIRM While driving with the moonroof closed, an abnormal noise \(popping, cracking, squeaking\) is present from the moonroof. HINT: The noise may be intermittent and can be from one or both sides of the moonroof. ACTION Follow the SERVICE PROCEDURE outlined in this bulletin to add a shim to the driver \(LH\) side and passenger \(RH\) side moonroof guide mounting bolts.
- [ITB20\-009A](/bulletins/10231083.md), 2023-02-04, Service bulletin: STRUCTURE. 2019\-2020 QX50; MOONROOF ASSEMBLY REPLACEMENT This bulletin is no longer active. Please discard previous versions of ITB20\-009.
- [ITB20\-008A](/bulletins/10231082.md), 2023-02-04, Service bulletin: STRUCTURE. 2019\-2020 QX50; RATTLE FROM MOONROOF This bulletin is no longer active. Please discard previous versions of ITB20\-008.
- [ITB22\-044](/bulletins/10229652.md), 2023-01-10, Service bulletin: STRUCTURE; EQUIPMENT. LICENSE PLATE BRACKET INSTALLATION ON FRONT FASCIA SERVICE INFORMATION When performing step 6 of the license plate bracket installation instructions in the owner’s manual, it is critical to maintain a 0.79 in. \(20 mm\) hole when drilling locations © \(Figure 1\). If a 0.79 in. \(20 mm\) hole is not maintained, the license plate bracket will not sit flush on the front fascia.
- [ITB20\-018](/bulletins/10178190.md), 2020-08-08, Service bulletin: STRUCTURE:BODY:DOOR; ELECTRICAL SYSTEM; EQUIPMENT. POWER BACK DOOR WILL NOT OPERATE WITH REQUEST SWITCHES IF YOU CONFIRM On vehicles equipped with a Kick Motion Activated Liftgate, the back door \(liftgate\) will not open or close when requested to do so using the: • Intelligent Key • Back door request switch, located on the back door • Automatic back door switch, located on the instrument lower panel LH And DTC B2409 is either current or has been stored in the past. ACTION Replace the automatic back door control module. • Refer to the Electronic Service Manual \(ESM\) section: BODY EXTERIOR, DOORS, ROOF \& VEHICLE SECURITY \> DOOR \& LOCK \> WITH INTELLIGENT KEY SYSTEM \> REMOVAL AND INSTALLATION \> AUTOMATIC BACK DOOR CONTROL MODULE.

JSON: [/v1/bulletins/10202233](/v1/bulletins/10202233)

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