# Service bulletin SSM75491

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: 10199805
- Published by NHTSA: 2021\-08\-04
- Manufacturer's number: SSM75491
- Manufacturer's date: 2021\-07\-29
- NHTSA component: ELECTRICAL SYSTEM; POWER TRAIN

## NHTSA's summary

Customer may report engine fan running at full duty following a PCM update.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10199805-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10199805-9999.pdf)

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

## Components

Electrical system, Transmission and driveline

## Vehicles listed

- 2021 LAND ROVER RANGE ROVER
- 2021 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
- [23V031000](/recalls/nhtsa/23V031000.md), 2023-01-26: BACK OVER PREVENTION:WARNINGS:EXTERNAL/PEDESTRIAN ALERT; ELECTRICAL SYSTEM:SOFTWARE
- [20V585000](/recalls/nhtsa/20V585000.md), 2020-09-24: ELECTRICAL SYSTEM:SOFTWARE; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS

## Other bulletins for the same vehicles and component

- [N861 Range Rover 18SEP26](/bulletins/11038355.md), 2026-10-07, Other: POWER TRAIN. Malfunction Indicator Lamp \(MIL\), loss of start/stop functionality and no communication during diagnostic sessions.
- [N900 Range Rover 21AUG26](/bulletins/11037146.md), 2026-09-08, Other: POWER TRAIN. Malfunction Indicator Lamp \(MIL\) illuminated on the instrument cluster. The root cause of the symptoms is the catalytic converter over temperature.
- [N861 Range Rover 17JUL26](/bulletins/11035875.md), 2026-08-05, Other: ELECTRICAL SYSTEM. Mild Hybrid Electric Vehicle \(MHEV\) Battery Offline
- [N900 Range Rover 16JUN26](/bulletins/11034940.md), 2026-07-08, Other: POWER TRAIN. Customers may experience loss of power, rattling from underside of the vehicle and the Malfunction Indicator Lamp \(MIL\) illuminated on the instrument cluster.
- [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.
- [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,
- [N900 Range Rover 20MAR26](/bulletins/11031117.md), 2026-04-07, Other: POWER TRAIN. Loss of power, rattling from underside of the vehicle and the Malfunction Indicator Lamp \(MIL\) illuminated on the instrument cluster. The root cause of the symptoms is the catalytic converter over temperature. The calibration of the exhaust sound tuning feature allows for too many repeated activations in a short period of time, resulting in catalytic converter over temperature and leading to Diagnostic Trouble Codes \(DTC\) P0420 and P0430 being stored in the Powertrain Control Module \(PCM\).
- [SSM76411 \- 10MAR26](/bulletins/11030751.md), 2026-04-06, Other: ELECTRICAL SYSTEM. Smart Key Deactivated message on instrument cluster and unable to start their vehicle
- [Range Rover\_N900 02\-20\-20](/bulletins/11029864.md), 2026-03-06, Other: POWER TRAIN. Loss of power, rattling from underside of the vehicle and the Malfunction Indicator Lamp \(MIL\) illuminated on the instrument cluster.

JSON: [/v1/bulletins/10199805](/v1/bulletins/10199805)

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