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Service bulletin BIG5OCT23_31

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 id10244857
Published by NHTSA2023-11-03
Manufacturer's numberBIG5OCT23_31
Manufacturer's date2023-10-16
NHTSA componentELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY THERMAL:MANAGEMENT:SOFTWARE; EQUIPMENT

NHTSA's summary

A concern has been identified on certain vehicles where the battery heater coolant hoses may have been incorrectly installed.

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 RANGE ROVER PHEV2023 (the catalog's model; the bulletin names a series or trim of it)
LAND ROVER RANGE ROVER SPORT PHEV2023 (the catalog's model; the bulletin names a series or trim of it)

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
23V5680002023-08-10. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
20232692023-05-04. Accessories

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
D100 Emission Recall2026-10-07. Emissions. D100 Emission Recall Owner Letter
D101 Emission Recall2026-10-07. Emissions. D101 Emission Recall Owner Letter
D103 Emission Recall2026-10-07. Emissions. D103 Emission Recall Owner Letter
D103 - 21MAY262026-06-03. Service bulletin. 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.
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.
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)