Dodge Durango 2018–2020 — technical service bulletin
Bulletin 9004226 · NHTSA communication 10220501 · issued Feb 24, 2021
Technical service bulletin
communication type
Fuel System, Gasoline
component
2018–2020
model years
3
vehicle entries
Official summary
TUBE, Coolant outlet (Rear Heater Return Line) Be advised, Mopar does offer rear coolant line repair kits for MY 2018 - 2020 vehicles for coolant leak repair. Please see TSB 23-023-20 for kit part numbers and instructions. If looking to replace the rear heater line due to a rub through from the trans oil heater (TOH) line clamp on the engine side: 1) Rotate the tangs on the clamp towards the transmission and out of the direction of the rear heater line 2) Adjust the TOH line by pushing it towards the engine to increase clearance between the TOH line and rear heater line.
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.