TSB 08-302-26 — Ram Service bulletin
08-302-26 is a service bulletin on file with NHTSA for 2 Ram models, 2026 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. Flash: Electronic Shift Module (ESM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● U1057-00 - High Speed Fd-Can3 Communication Bus Performance. Customers…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years 08-302-26 names
Every document filed under 08-302-26
| Document ID | Filed | Type |
|---|---|---|
| 08-302-26 | August 1, 2026 | Service bulletin |
What 08-302-26 covers
Transmission & drivetrain, Electrical — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 08-302-26?
08-302-26 is a service bulletin filed with NHTSA by Ram, covering 2 Ram models across the 2026 model years. NHTSA's summary reads: Flash: Electronic Shift Module (ESM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● U1057-00 - High Speed Fd-Can3 Communication Bus Performance. Customers…
Which vehicles does 08-302-26 cover?
NHTSA's file names Ram 2500 (2026); Ram 3500 (2026). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB 08-302-26 a recall, and is the repair free?
No. 08-302-26 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of 08-302-26?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under 08-302-26, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under 08-302-26. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.