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Service bulletin 08-394-25 REV. A

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 id11026677
Published by NHTSA2025-12-17
Manufacturer's number08-394-25 REV. A
Manufacturer's date2025-12-12
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Telematics Box Module (TBM) Backup Battery Replacement When DTC B1E21 Is Present Technicians may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● B1E21-96 - Backup Battery Component Internal Failure.

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

Trouble codes named

B1E21

Vehicles listed
ALFA ROMEO GIULIA2019 to 2026
ALFA ROMEO STELVIO2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
ALFA ROMEO TONALE2025, 2026
ALFA ROMEO TONALE PHEV2024 (the catalog's model; the bulletin names a series or trim of it)
CHRYSLER PACIFICA2022, 2023, 2024, 2025, 2026
CHRYSLER PACIFICA PLUG-IN HYBRID2022, 2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
CHRYSLER VOYAGER2022, 2023, 2024, 2025
DODGE CHALLENGER2023
DODGE CHARGER2023, 2024, 2025, 2026
DODGE DURANGO2022, 2023, 2024, 2025, 2026
DODGE HORNET2023, 2024, 2025
DODGE HORNET2026
JEEP COMPASS2022, 2023, 2024, 2025, 2026
JEEP GLADIATOR2022, 2023, 2024, 2025, 2026
JEEP GRAND CHEROKEE2022, 2023, 2024, 2025, 2026
JEEP GRAND CHEROKEE 4XE2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it)
JEEP GRAND CHEROKEE L2022, 2023, 2024, 2025, 2026
JEEP GRAND WAGONEER2022, 2023, 2024, 2025, 2026
JEEP RECON2026
JEEP RENEGADE2019, 2020, 2021, 2022, 2023
JEEP RENEGADE2024 to 2025
JEEP WAGONEER2022, 2023, 2024, 2025
JEEP WAGONEER2026
JEEP WAGONEER S2024, 2025, 2026
JEEP WRANGLER2022, 2023, 2024, 2025, 2026
JEEP WRANGLER 4XE2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it)
RAM 15002022, 2023, 2024, 2025, 2026
RAM 25002022, 2023, 2024, 2025, 2026
RAM 35002022, 2023, 2024, 2025, 2026
RAM 45002022, 2023, 2024, 2025, 2026
RAM 55002022, 2023, 2024, 2025, 2026
RAM PROMASTER2023 to 2026
RAM PROMASTER CITY2022

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

Recalls for the same vehicles and component
26V3620002026-06-04. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
26V2620002026-04-23. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
26V2250002026-04-09. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
20260432026-02-02. Electrical
26V0590002026-02-02. ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; EXTERIOR LIGHTING:TURN SIGNAL; EXTERIOR LIGHTING:BRAKE LIGHTS
25V8260002025-12-01. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
25V7410002025-10-30. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
25V7100002025-10-17. ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT:POWER CONTROL UNIT/MODULE (HPCU):SOFTWARE
25V5760002025-09-04. ELECTRICAL SYSTEM:PROPULSION SYSTEM
25V5300002025-08-18. SERVICE BRAKES; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

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
S26080000382026-10-16. Service bulletin. High Voltage Battery Has Lower SOC After Overnight Sleep Cycle
91009282026-10-16. Service bulletin. TPMS full assembly(core & Stem To support proper failure analysis and validation, dealers must return the complete TPMS sensor assembly when submitting a claim related to a TPMS leak concern. Claims submitted with TPMS sensors that are missing the valve core and/or stem components will be considered incomplete and will not be eligible for evaluation. As a reminder, the complete Tire Pressure Monitor, including the valve stem should be returned., the claim will be rejected and subject to warranty chargeback, as Stellantis cannot perform a comprehensive root cause analysis without all original components of the assembly.
08-360-262026-10-16. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● C147B-92 - Front Axle Disconnect Sensor Performance or Incorrect Operation Customers may comment on one or more of the following: ● 4WD system warning lights, service messages, or flashing indicators are displayed in the Instrument Panel Cluster (IPC). ● The vehicle does not engage 4WD properly. This bulletin involves reprogramming the DTCM with the latest available software.
08-359-262026-10-16. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● C147B-92 - Front Axle Disconnect Sensor Performance or Incorrect Operation Customers may comment on one or more of the following: ● 4WD system warning lights, service messages, or flashing indicators are displayed in the Instrument Panel Cluster (IPC). ● The vehicle does not engage 4WD properly. This bulletin involves reprogramming the DTCM with the latest available software.
08-357-262026-10-16. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● C147B-92 - Front Axle Disconnect Sensor Performance or Incorrect Operation Customers may comment on one or more of the following: ● 4WD system warning lights, service messages, or flashing indicators are displayed in the Instrument Panel Cluster (IPC). ● The vehicle does not engage 4WD properly. This bulletin involves reprogramming the DTCM with the latest available software.
08-356-262026-10-16. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● C147B-92 - Front Axle Disconnect Sensor Performance or Incorrect Operation Customers may comment on one or more of the following: ● 4WD system warning lights, service messages, or flashing indicators are displayed in the Instrument Panel Cluster (IPC). ● The vehicle does not engage 4WD properly. This bulletin involves reprogramming the DTCM with the latest available software.
08-355-262026-10-16. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● C147B-92 - Front Axle Disconnect Sensor Performance or Incorrect Operation Customers may comment on one or more of the following: ● 4WD system warning lights, service messages, or flashing indicators are displayed in the Instrument Panel Cluster (IPC). ● The vehicle does not engage 4WD properly. This bulletin involves reprogramming the DTCM with the latest available software.
08-354-262026-10-16. Service bulletin. Flash: Drivetrain Control Module (DTCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● C147B-92 - Front Axle Disconnect Sensor Performance or Incorrect Operation Customers may comment on one or more of the following: ● 4WD system warning lights, service messages, or flashing indicators are displayed in the Instrument Panel Cluster (IPC). ● The vehicle does not engage 4WD properly. This bulletin involves reprogramming the DTCM with the latest available software.
08-149-26 REV. B2026-10-16. Service bulletin. Flash: Electric Power Steering (EPS) Module Updates Customers may experience the following: SYMPTOM: ● Battery drain due to the EPS system staying active after ignition off. This bulletin involves inspecting and possibly reprogramming the EPS module with the latest available software.
08-139-26 REV. B2026-10-16. Service bulletin. Flash: Radio Frequency Hub Module (RFHM) Updates Customer may experience the following: SYMPTOM: ● Excessive Ignition Off Draw (IOD) on 12v vehicle battery if keys are left within proximity range. This bulletin involves inspecting and possibly reprogramming the RFHM module with the latest available software