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Service bulletin SSM74839ATT

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 id10177193
Published by NHTSA2020-07-09
Manufacturer's numberSSM74839ATT
Manufacturer's date2020-06-04
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Pivi Pro navigation map data fails to install from USB device to vehicle

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

Vehicles listed
LAND ROVER DEFENDER2020

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

Recalls for the same vehicles and component
26V5990002026-09-17. ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER
26V2480002026-04-17. ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER
21V4240002021-06-03. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

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
N811 Defender 15MAY262026-06-04. Other. Door Zone Module - Quiescent Drain
N811 Defender 17APR262026-05-07. Other. Door Zone Module - Quiescent Drain
N811 Defender 20MAR262026-04-07. Other. Door Zone Module - Quiescent Drain
SSM76411 - 10MAR262026-04-06. Other. Smart Key Deactivated message on instrument cluster and unable to start their vehicle
TUCC_FEB2026_352026-03-04. Other. There is a concern with the 48Volt charging system(DC/DC) with the vehicle.
TUCC_FEB2026_342026-03-04. Other. There is a concern/fault with the 48Volt MHEV system.
TUCC_FEB2026_332026-03-04. Other. 12V STARTUP BATTERY FLAT - MILD HYBRID ELECTRIC VEHICLE (MHEV)
252602.027 - 12FEB262026-03-04. Service bulletin. Once the vehicle is powered down via ignition cycle, it may not restart depending on remaining residual charge.
TUCC_JAN2026_252026-02-06. Other. There is a concern with the 48Volt charging system(DC/DC) with the vehicle.
TUCC_DEC2025_392026-01-08. Other. A battery warning light on and or electrical system failure message is displayed on instrument cluster.