Jeep Wrangler 2021 — technical service bulletin
Bulletin 2101021 · NHTSA communication 10221673 · issued Jul 17, 2021
Technical service bulletin
communication type
Exterior Lighting
component
2021
model years
1
vehicle entries
Official summary
Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the following on a vehicle with less than 644 km (400 miles) on the odometer: A Malfunction Indicator Lamp (MIL) event or failure withnoDiagnostic Trouble Codes (DTCs) and the vehicle has less than 644 km (400 miles) on the odometer indicates it is likely the vehicle has experienced an unintentional code clear event.Do not use this software update if vehicle odometer has over 644 km (400 miles).
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.