Service bulletin B120120

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10174002
Published by NHTSA	2020-04-20
Manufacturer's number	B120120
Manufacturer's date	2020-04-01
NHTSA component	LANE DEPARTURE: SENSING SYSTEM: OTHER; LANE DEPARTURE

NHTSA's summary

ENGINE: FAULTS FOR TURBOCHARGER ELECTRIC WASTEGATE STORED IN THE DME: This Service Information Bulletin (Revision 1) replaces SI B12 01 20 dated January 2020. The engine malfunction warning (MIL) is illuminated and one of the following fault codes is stored in the DME.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Driver assistance

Vehicles listed
BMW X3	2020
BMW X4	2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
21V096000	2021-02-19. BACK OVER PREVENTION:SOFTWARE; BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
20V598000	2020-09-30. BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
20V443000	2020-07-29. BACK OVER PREVENTION: SENSING SYSTEM: CAMERA; ELECTRICAL SYSTEM:SOFTWARE
19V684000	2019-09-27. BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
B660923	2023-10-01. Service bulletin. The customer states that one or more of the following situations may occur: 1. The availability of the Steering and Lane Control Assistant is deteriorating, and/or that the function allows thevehicle to move from side to side within the lane markings. 2. The parking space detection is less effective or hardly ever receives any parking space recommendations fromthe PMA.
B650122	2023-09-18. Service bulletin. A check control message (CCM) for the restraint system (Air bag) appears. In the instrument cluster, the red air bag warning light lights up permanently.
SIB660823	2023-05-15. Service bulletin. Issues with the various functions of the camera-based driver assistance systems (KAFAS system) can possibly lead to following customer complaints: KAFAS camera system deactivates itself, due to system restrictions that are not clear to the customer KAFAS camera system cannot be activated due to system restrictions that are not clear to the customer Road signs are sporadically not detected.
B841422	2023-05-01. Service bulletin. Customer is shown an incorrect GPS location in the vehicle (i.e., Nav Map, coordinates).
B511722	2022-12-12. Service bulletin. Due to the semiconductor supply, the Local Interconnect Network module in either of the exterior mirrors was switched to another controller. That one provides an imprecise voltage measurement, which the main controller interprets as a fault. For the driving cycle, the customer may lose the display in either mirror and the Lane Change Warning function and, if installed, other functions such as- Side collision warning; Lane Change Assistant; Steering and Lane Control Assistant; Emergency Lane Assistant Hands Off 60 Assistant.
B662719	2022-10-31. Service bulletin. The Lane Change Warning (LCW) yellow triangle symbol on either one, or both the exterior side view mirrors does not illuminate to alert the driver when it should.
SIB660620	2022-07-05. Service bulletin. The functionality of the right front SRR sensor could be reduced which would display the "Driving Assistance" Check Control Message.
SIB650122	2022-06-21. Service bulletin. A check control message for the restraint system appears. In the instrument cluster, the red air bag warning light lights up permanently.
B090321	2022-06-21. Service bulletin. In some rare cases a customer vehicle might be excluded from one or more Remote Software Upgrade(RSU) campaigns. This SIB gives an overview how to identify these vehicles and how to proceed in case of a customer complaint.
B661519	2022-05-16. Service bulletin. The steering intervention for Lane Departure Warning (LDW) is too strong (severe), which can create an uncomfortable feeling for the driver. Background: Steering intervention helps keep the vehicle in the lane if the system detects that a lane marking has been crossed. The steering intervention can be noticed on the steering wheel and can be manually overridden at any time.