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Service bulletin B840121

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)
TypeService bulletin
NHTSA id10200487
Published by NHTSA2021-08-23
Manufacturer's numberB840121
Manufacturer's date2021-05-01
NHTSA componentEQUIPMENT:ELECTRICAL

NHTSA's summary

TELEMATICS UNIT DEACTIVATION DUE TO 3G CELLULAR TECHNOLOGY DISCONTINUATION: The discontinuation of 3G cellular communication for Combox, TCB 3G and ATM 3G (Telematics ControlModule) can no longer be supported by the cellular network provider starting February 2022.

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

Equipment and accessories

Vehicles listed
BMW 228I2014, 2015, 2016
BMW 230I2017, 2018, 2019, 2020, 2021
BMW 320I2013, 2014, 2015, 2016, 2017, 2018
BMW 328D2014, 2015, 2016, 2017, 2018
BMW 328I2012, 2013, 2014, 2015, 2016
BMW 330E2016, 2017, 2018
BMW 330I2017, 2018, 2019, 2020
BMW 335I2012, 2013, 2014, 2015, 2016, 2017
BMW 340I2016, 2017, 2018, 2019
BMW 340I2020
BMW 428I2014, 2015, 2016
BMW 430I2017, 2018, 2019, 2020
BMW 435I2014, 2015, 2016
BMW 440I2017, 2018, 2019, 2020
BMW 525D XDRIVE2014
BMW 528I2011, 2012, 2013, 2014, 2015, 2016
BMW 535D2014, 2015, 2016
BMW 535I2011, 2012, 2013, 2014, 2015, 2016, 2017
BMW 535I GRAN TURISMO2010, 2011, 2012 (the catalog's model; the bulletin names a series or trim of it)
BMW 535I US2011 (the catalog's model; the bulletin names a series or trim of it)
BMW 550I2011, 2012, 2013, 2014, 2015, 2016, 2017
BMW 550I GRAN TURISMO2010, 2011, 2012 (the catalog's model; the bulletin names a series or trim of it)
BMW 640I2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
BMW 650I2012, 2013, 2014, 2015, 2016, 2017, 2018
BMW 740I2012, 2013, 2014, 2015
BMW 740LD2015
BMW 740LI2011, 2012, 2013, 2014, 2015
BMW 750I2009, 2010, 2011, 2012, 2013, 2014, 2015
BMW 750LI2009, 2010, 2011, 2012, 2013, 2014, 2015
BMW 760LI2010, 2011, 2012
BMW 760LI2014, 2015
BMW ACTIVE HYBRID 32013
BMW ACTIVE HYBRID 32014, 2015
BMW ACTIVE HYBRID 52012, 2013
BMW ACTIVE HYBRID 72012 to 2013
BMW ACTIVE HYBRID 72014, 2015
BMW ACTIVEHYBRID 72011
BMW B7 ALPINA2015 to 2016
BMW I32014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
BMW I82014, 2015, 2016, 2017
BMW I82019, 2020
BMW M235I2014, 2015, 2016
BMW M240I2017, 2018, 2019, 2020, 2021
BMW M32015, 2016, 2017, 2018
BMW M42015, 2016, 2017, 2018, 2019, 2020
BMW M52013, 2014, 2015, 2016
BMW M62013, 2014, 2015, 2016, 2017, 2018, 2019
BMW X12013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
BMW X1 SAV2012 to 2017
BMW X32011, 2012, 2013, 2014, 2015, 2016, 2017
BMW X42015, 2016, 2017, 2018
BMW X52014, 2015, 2016, 2017, 2018
BMW X5 M2018
BMW X62015, 2016, 2017, 2018, 2019
BMW X6 M2015 to 2019
BMW Z42009, 2010, 2011, 2012, 2013, 2014, 2015, 2016

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

Recalls for the same vehicles and component
18V6520002018-09-20. EQUIPMENT:ELECTRICAL
17V3270002017-05-18. TIRES; EQUIPMENT:OTHER:LABELS
10V0470002010-02-18. EQUIPMENT:OTHER:LABELS

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
B6607202024-03-02. Service bulletin. The functionality of the left rear SRR sensor could be reduced which would display the Driving Assistance Check Control Message.
B6608202024-03-02. Service bulletin. The functionality of the right rear SRR sensor could be reduced which would display the "Driving Assistance"- Check Control Message.
B6105242024-02-01. Service bulletin. The Central Information Display goes black intermittently due to resets of the Head Unit (HU-H3). FaultB7F8F9 â“ âHU-H: Resetâ will be stored in the HU-H3.
B6534232023-12-06. Service bulletin. Customers may state that the alarm system (DWA) is not active after locking their unoccupied vehicle. Depending on the vehicle’s equipment and settings, no acoustic or optical confirmation (folding the mirrors/blinking confirmation) is noticeable. Additionally, the red anti-theft alarm LED in the interior mirror does not briefly flash every 2 seconds, indicating the alarm is armed.
B6127232023-12-06. Service bulletin. When using the Key Reader to retrieve CBS information from the customer key, no current vehicle data is available, or the data does not match the maintenance schedule.
B6528232023-10-01. Service bulletin. Customers may be experiencing one or more of these following issues with Bluetooth operation: Bluetooth cannot be switched on or off in the head unit (HU-H4) Paired mobile devices cannot be deleted Customer is unable to make phone calls or stream music with mobile device Customer is unable to connect a new mobile device via Bluetooth Mobile device does not automatically reconnect via Bluetooth in the next drive cycle (after short sleep cycle)
SB23-012023-08-03. Service bulletin. Spl Parts, Inc. communications index accompanying MCP uploads 23mc40464 & 23mc40471
sb23-01TMS2023-08-02. Service bulletin. This is the companion to SPL Parts, Inc.'s SB 23-01 mailed by private label independent distributor Turner Motorsports.
SB 23-012023-08-02. Service bulletin. SPL Parts, Inc. manufacturers and distributes aftermarket lower control arms for dedicated competition vehicles and "track day" cars some of which may be used on both track and highway. SB 23-01 adresses proper installation torque of cap bolt fasteners attaching SPL's aftermarket lower control arms, recurring inspection and confirmation of torque setting and removal and replacement of damaged or under torqued fasteners to reduce risk of premature failure and accident. SB-23-01 was mailed, emailed and posted on SPL website to known resellers, race teams and users of the affected parts and is being submitted here as required by part 579.5. Vehicle Applications include: BMW series 1,2,3,& 4, 2008-2023; Chevrolet Camaro 26-2023, Cadillac ATS, CTS 2016-2019; Ford Mustang 2015-2023; Toyota Supra 2020-2023.
B6113202023-07-24. Service bulletin. In the event of an accident, the two-battery Dual Storage System (DSS) is disconnected from the electrical system via an internal relay.