RAM Promaster 2016–2020 — technical service bulletin
Bulletin 9004121 · NHTSA communication 10188615 · issued Feb 3, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2016–2020
model years
5
vehicle entries
Official summary
RADIATOR, Engine Cooling For radiator leak concerns, please contact FCA Redacted Content If no response in 15 minutes, proceed with repair. Please email VIN, dealer code, mileage and picture of the leak to: FCA Redacted Content
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.