# Service bulletin UPS5621\-1

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: 10224372
- Published by NHTSA: 2022\-10\-22
- Manufacturer's number: UPS5621\-1
- Manufacturer's date: 2022\-09\-12
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

Active Roll Control Module \(ARCM\) Initialization Failure

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10224372-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10224372-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2023 LAND ROVER RANGE ROVER
- 2022 to 2023 LAND ROVER RANGE ROVER SPORT

## Recalls for the same vehicles and component

- [26V599000](/recalls/nhtsa/26V599000.md), 2026-09-17: ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER
- [26V248000](/recalls/nhtsa/26V248000.md), 2026-04-17: ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER
- [23V568000](/recalls/nhtsa/23V568000.md), 2023-08-10: ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
- [23V031000](/recalls/nhtsa/23V031000.md), 2023-01-26: BACK OVER PREVENTION:WARNINGS:EXTERNAL/PEDESTRIAN ALERT; ELECTRICAL SYSTEM:SOFTWARE

## Other bulletins for the same vehicles and component

- [D100 Emission Recall](/bulletins/11038290.md), 2026-10-07, Emissions: ELECTRICAL SYSTEM. D100 Emission Recall Owner Letter
- [D101 Emission Recall](/bulletins/11038289.md), 2026-10-07, Emissions: ELECTRICAL SYSTEM. D101 Emission Recall Owner Letter
- [D103 Emission Recall](/bulletins/11038288.md), 2026-10-07, Emissions: ELECTRICAL SYSTEM. D103 Emission Recall Owner Letter
- [N861 Range Rover 17JUL26](/bulletins/11035875.md), 2026-08-05, Other: ELECTRICAL SYSTEM. Mild Hybrid Electric Vehicle \(MHEV\) Battery Offline
- [N861 Range Rover 16JUN26](/bulletins/11034884.md), 2026-07-08, Other: ELECTRICAL SYSTEM. 48V Mild Hybrid Electric Vehicle \(MHEV\) battery enters an offline state and no longer communicates or functions as intended. This can result in illumination of the Malfunction Indicator Lamp \(MIL\) ,loss of start/stop functionality and no communication during diagnostic sessions.
- [N861 Range Rover 15MAY26](/bulletins/11033423.md), 2026-06-04, Other: ELECTRICAL SYSTEM. 48V Mild Hybrid Electric Vehicle \(MHEV\) battery enters an offline state and no longer communicates or functions as intended.
- [D103 \- 21MAY26](/bulletins/11033209.md), 2026-06-03, Service bulletin: ELECTRICAL SYSTEM. Due to inadequate penetration of welding between the cells, the battery’s capacity and therefore the vehicle’s electric range may be depleted below the design intent condition.
- [N861 Range Rover 17APR26](/bulletins/11032423.md), 2026-05-07, Other: ELECTRICAL SYSTEM. On certain 48V Mild Hybrid Electric Vehicle \(MHEV\) battery enters an offline state and no longer communicates or functions as intended. Malfunction Indicator Lamp \(MIL\) might be illuminated,
- [N928 Range Rover 20MAR26](/bulletins/11031119.md), 2026-04-07, Other: ELECTRICAL SYSTEM. Software Over The Air \(SOTA\) updates are failing to complete.
- [N869 Range Rover 20MAR26](/bulletins/11031114.md), 2026-04-07, Other: ELECTRICAL SYSTEM. Software Over The Air \(SOTA\) updates are failing to complete.

JSON: [/v1/bulletins/10224372](/v1/bulletins/10224372)

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