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Service bulletin B640421

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 id10200244
Published by NHTSA2021-08-09
Manufacturer's numberB640421
Manufacturer's date2021-06-01
NHTSA componentELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:APPLIANCE:AIR CONDITIONER

NHTSA's summary

Moisture in the driver footwell and/or passenger footwell when the air conditioning (A/C) is activated.

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

Electrical system, Equipment and accessories, Heating and air conditioning

Vehicles listed
BMW X52019, 2020, 2021

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

Recalls for the same vehicles and component
25V6440002025-09-25. ELECTRICAL SYSTEM:STARTER ASSEMBLY
20244442024-08-01. Electrical
24V5760002024-08-01. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; ELECTRICAL SYSTEM:STARTER ASSEMBLY
21V5200002021-07-08. AIR BAGS:FRONTAL; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
20206052020-12-10. Electrical
20V7610002020-12-09. ELECTRICAL SYSTEM:12V/24V/48V BATTERY
20V6010002020-09-30. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY
20V4900002020-08-18. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY; ELECTRICAL SYSTEM:12V/24V/48V BATTERY
20V4650002020-08-07. ELECTRICAL SYSTEM:STARTER ASSEMBLY; POWER TRAIN:AUTOMATIC TRANSMISSION
18V9180002018-12-19. 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
B1104262026-08-03. Service bulletin. The manual starting of electronic engine oil level measurement from inside the vehicle, usually afterperforming an engine oil service task, is inoperative or it may lock up at between a 15% to 30% completionrate.
B8402262026-07-31. Service campaign. Once the Telematics Module (TCB2) enters sleep mode, a BMW Data Services trigger for Remote Services(remote engine start, lock/unlock/climate conditioning) will not be able to reactivate the TCB2. Due to this issue, Remote Services will not function in the vehicle when parked and locked.
B6111242024-04-01. Service bulletin. After performing a BMW Remote Software Upgrade (RSU), the functionality of the Comfort Access andPassive Go/Exit features may be reduced. Also, one or more of the following error memory entries below may be stored in the Basic Central Platform(BCP) module. 80424A Remote control receiver at the front (FBD5 VM): Programming defective 80424B Remote control receiver at the rear (FBD5 HM): Programming defective 80424C Remote control receiver at the front left (FBD5s VL): Programming defective 80424D Remote control receiver at the front right (FBD5s VR): Programming defective 80424E Remote control receiver at the rear right (FBD5s HR): Programming defective 80424F Remote control receiver at the rear left (FBD5s HL): Programming defective
B5115202024-04-01. Service bulletin. Deactivated: Currently investigating other components that maybe playing a factors besides what is mentioned in the SIB. Topic is under investigation.
B6103212024-03-02. Service bulletin. SITUATION BMW AG is conducting a Voluntary Emissions Recall (effective April 23, 2021) on a certain Model Year 2020 - 2021 BMW vehicles that were produced between August 13, 2019 and December 11, 2020. Do not deliver to a customer, a New, Certified Pre-Owned or Used vehicle subject to an emissions recall, until the vehicle is repaired. Do not use or sell replacement equipment/parts subject to an emissions recall. The 12 V battery’s dual storage system (DSS) may contain a software error which intermittently causes a continuous resetting of the microcontroller and communication failure. The error is displayed by a red Check Control message.
B5108192024-02-01. Service bulletin. The basic conditions for initializing the power windows are not met.
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.
B6411232024-02-01. Service bulletin. Check Engine light is on IHKA has stored fault 80131C “IHKA: 12V voltage sensor plausibility”
B6113052024-02-01. Service bulletin. The electrical system of BMW vehicles has been subject to an ongoing development process over the last few years. This has led to increased demands being placed on the battery. This document covers important information for the dealer on how to handle “discharged battery” complaints.
B5413192024-02-01. Service bulletin. The roller sunshade (aka sun protection or sunblind) of the front panoramic sunroof is bunching up during operation or may hang down and appear loose.