Jeep Wrangler 2018–2021 — technical service bulletin
Bulletin 74244 · NHTSA communication 10223470 · issued May 3, 2021
Technical service bulletin
communication type
Power Train
component
2018–2021
model years
7
vehicle entries
Official summary
Warranty Bulletin D-20-23 Part Order Restriction Program - 48V Power Pack Unit (PPU) - Select 2018 - 2021 Jeep Wrangler (JL) and 2019 - 2021 RAM (DT) (Rev. A)
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.