BMW X3 2020–2021 — technical service bulletin
Bulletin B110420 · NHTSA communication 10188937 · issued Feb 1, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020–2021
model years
4
vehicle entries
Official summary
CONNECTING ROD BEARING: The engine must be replaced due to a crankcase manufacturing error. Do not deliver to a customer, a New, Certified Pre-Owned or Used vehicle subject to a Delivery Stop, until the vehicle is repaired. Do not use or sell replacement equipment/parts subject to a Delivery Stop.
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.