Service bulletin B340220

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	10175274
Published by NHTSA	2020-05-18
Manufacturer's number	B340220
Manufacturer's date	2020-04-01
NHTSA component	ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC)

NHTSA's summary

NOTICEABLE JERK WHEN DRIVING OFF IN ACTIVE CRUISE CONTROL (ACC) MODE: A noticeable jerk can be felt at 2-3 mph when driving off in ACC mode. Software in the Dynamic Stability Control (DSC) unit.

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 330I	2019, 2020
BMW M340I	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
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
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).
B652022	2022-12-19. Service bulletin. A check control message for the restraint system appears. In the instrument cluster, the red air bag warning light lights up permanently. One of the following fault codes is stored in the ACSM (air bag control unit): 930949 - Knee airbag, driver: short circuit to negative terminal 93094F - Knee airbag, front passenger: short circuit to negative terminal 93094C - Knee airbag driver's side: Resistance too great 930952 - Knee airbag, front passenger: Resistance too great.
B650414	2022-12-12. Service bulletin. According to the customer, the airbag warning light was on, but it may not be illuminated when the vehicle arrives in the workshop. 1. ACSM fault code "930A60 - Seat occupancy detection, front passenger; malfunction" is stored. The fault may or may not currently be present. Or 2. ACSM fault code "930A1C - Front passenger seat occupancy detection transmitting fault(moisture)" is stored. The fault may or may not currently be present.
SIB660820	2022-07-05. Service bulletin. The functionality of the right rear SRR sensor could be reduced which would display the "Driving Assistance" Check Control Message.
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.
B121221	2021-12-27. Service bulletin. ???Due to an unfavorable operating point primarily in the low-end torque range, the fuel vapor scavenging that takes place in that range may result in incorrect detection of a mixture that is too rich. As a result, an incorrect mixture adaptation value is stored.
B340621	2021-07-19. Service bulletin. SERVICE ACTION: PROGRAM THE DYNAMIC STABILITY CONTROL (DSC) UNIT: Software in the DSC unit could cause a reduction of brake regeneration for the next 40 drive (key) cycles.
B340621	2021-07-06. Service bulletin. SERVICE ACTION: PROGRAM THE DYNAMIC STABILITY CONTROL (DSC) UNIT: Software in the DSC unit could cause a reduction of brake regeneration for the next 40 drive (key) cycles.