Jeep Grand Cherokee 2024–2026 — technical service bulletin
Bulletin 9100708 · NHTSA communication 11025037 · issued Oct 29, 2025
Technical service bulletin
communication type
Electrical System
component
2024–2026
model years
9
vehicle entries
Official summary
DTC B1E21 is triggered when the TBM Backup Battery is discharged, inactive, or drained. This can happen during the lifetime of the vehicle. TBM should not be replace for B1E21, since there is no fault on TBM. TBM battery is replaceable. Part number of the back-up battery inside TBM is 68597650AA.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.