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Service bulletin SSM75825ATT

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10222693
Published by NHTSA2022-10-07
Manufacturer's numberSSM75825ATT
Manufacturer's date2022-09-28
NHTSA componentEQUIPMENT; ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER

NHTSA's summary

MHEV DC DC CONVERTER SQUEAKING NOISE FROM INSIDE THE CABIN

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Equipment and accessories, Hybrid and electric drive

Vehicles listed
LAND ROVER DEFENDER2020, 2021, 2022, 2023
LAND ROVER DISCOVERY2016
LAND ROVER DISCOVERY2017, 2018, 2019, 2020, 2021, 2022, 2023
LAND ROVER DISCOVERY SPORT2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023
LAND ROVER RANGE ROVER2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
LAND ROVER RANGE ROVER SPORT2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
LAND ROVER RANGE ROVER VELAR2018, 2019, 2020, 2021, 2022, 2023

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20264422026-09-17. High Voltage
26V5990002026-09-17. ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER
20261962026-04-17. High Voltage
26V2480002026-04-17. ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER
25V0160002025-01-16. EQUIPMENT:ELECTRICAL:INFOTAINMENT:VIDEO (TOUCH)SCREEN/MONITOR/UNIT; BACK OVER PREVENTION:SOFTWARE
20247392024-12-05. Accessories
23V3930002023-06-01. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; LATCHES/LOCKS/LINKAGES:DOORS:LATCH
20232692023-05-04. Accessories
23V0310002023-01-26. BACK OVER PREVENTION:WARNINGS:EXTERNAL/PEDESTRIAN ALERT; ELECTRICAL SYSTEM:SOFTWARE
22V5810002022-08-04. ELECTRICAL SYSTEM:ADAS

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
N861 Range Rover 17JUL262026-08-05. Other. Mild Hybrid Electric Vehicle (MHEV) Battery Offline
N861 Range Rover 16JUN262026-07-08. Other. 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 15MAY262026-06-04. Other. 48V Mild Hybrid Electric Vehicle (MHEV) battery enters an offline state and no longer communicates or functions as intended.
N811 Discovery 15MAY262026-06-04. Other. Door Zone Module - Quiescent Drain
N811 Defender 15MAY262026-06-04. Other. Door Zone Module - Quiescent Drain
N861 Range Rover 17APR262026-05-07. Other. 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,
N811 Discovery 17APR262026-05-07. Other. Door Zone Module - Quiescent Drain
N811 Defender 17APR262026-05-07. Other. Door Zone Module - Quiescent Drain
N928 Range Rover 20MAR262026-04-07. Other. Software Over The Air (SOTA) updates are failing to complete.
N869 Range Rover 20MAR262026-04-07. Other. Software Over The Air (SOTA) updates are failing to complete.