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Service bulletins for the 2020 BMW 330i

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.

306 on file from NHTSA, as of 2026-10-19.

By type

By component

Bulletins, newest first
B6113202020-10-19. Service bulletin. ELECTRICAL SYSTEM. SERVICE ACTION - CHECKING THE DUAL STORAGE SYSTEM AND REPLACE IF NECESSARY: In the event of an accident, the two-battery Dual Storage System (DSS) is disconnected from the electrical system via an internal relay. In some cases, the relay is stuck closed and a fault is set. In these circumstances: A crash shutdown of the DSS does not occur The power distribution box is supplied with power until the DSS is fully discharged.
B5112192020-10-19. Service bulletin. STRUCTURE. KIDNEY GRILL ACTIVE AIR FLAP FAULTS: A check control message or MIL (Malfunction Indicator Lamp) may be illuminated.
B3101202020-10-19. Service bulletin. SUSPENSION. SERVICE ACTION - REPLACE THE WISHBONE OR TENSION STRUT: An incorrectly pressed-in rubber mount in the wishbone, or hydraulic mount in the tension strut can lead to acoustic abnormalities in the front axle. A process fault at the supplier resulted in the mounts of the affected wishbone or tension strut to be incorrectly pressed in.
B6624192020-09-14. Service bulletin. ELECTRICAL SYSTEM. REMOTE CONTROL IS NOT DETECTED: Vehicle cannot be opened or closed using comfort access, engine start is not possible, and the vehicle may not start when placing the key against the steering column. Note: Opening, closing and starting via the BMW Digital Key or the Digital Key Card are not affected. Software error in the BDC (Body Domain Controller) module.
B6619192020-09-14. Service bulletin. ELECTRICAL SYSTEM. COMFORT ACCESS AND COMFORT GO NOT POSSIBLE: Vehicle cannot be unlocked/locked or started via Comfort Access. Remote control functionality is restored by pressing any of the key buttons or by removing and reinstalling the remote control key battery.
B6615192020-09-14. Service bulletin. LANE DEPARTURE. LANE DEPARTURE WARNING - STEERING INTERVENTION TOO STRONG: 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. Software error in the KAFAS (camera-based driver assistance system) control unit.
B6515202020-09-14. Service bulletin. ELECTRICAL SYSTEM. HEAD UNIT RESETS WHEN NAVIGATION IS USED IN CERTAIN LOCATIONS: The head unit resets sporadically causing the CID to turn black and then starts up again after a short time with the message "Start navigation system". This only occurs during navigation guidance when the "3D building" function is used Software in the Head Unit High (HU-H3).
B6117202020-09-14. Service bulletin. ELECTRICAL SYSTEM. DELIVERY STOP - HIGH-VOLTAGE BATTERY: Please do not charge the vehicle high-voltage battery until further notice. There may be a potential issue in the welding process of the HV-modules.
B6101202020-09-14. Service bulletin. ELECTRICAL SYSTEM. ACCESSORIES DO NOT POWER ON: Customer is not able to power accessories using the 12 volt power socket. Design change to reduce short circuits and blown fuses.
B5112192020-09-14. Service bulletin. ENGINE AND ENGINE COOLING. KIDNEY GRILL ACTIVE AIR FLAP FAULTS: A check control message or MIL (Malfunction Indicator Lamp) may be illuminated, with one or more of the following faults stored: 138207- Active cooling damper control (AKKS), top: blockage at warm ambient temperature 21B043- Active cooling damper control (AKKS), top: blockage at all ambient temperatures 138222- Active cooling damper control (AKKS), above: positional deviation error detected at warm ambient temperature 138209- Active cooling damper control (AKKS), top: Control deviation at all ambient temperatures 13822B- Active cooling damper control (AKKS), top: Control deviation at all ambient temperatures 21B042- Active cooling damper control (AKKS), below: blockage at all ambient temperatures 138206- Active cooling damper control (AKKS), bottom, blockage at warm ambient temperature 138225-Active air-flap control, bottom: top limit position not detected 138224-Active air-flap control, bottom: bottom limit position not detected Multiple potential issues may be the cause, including: 1. Faulty active air flap(s) (Upper and/or lower) 2. Software error in the DME 3. Debris or blockages from outside influence (non-warranty) 4. Information error memory that does not require a repair 5. For G20 only- Detached lower active air flaps
B1222192020-09-14. Service bulletin. ELECTRICAL SYSTEM. EME GROUND CONNECTION MONITORING FAULTS: Check Control message (CCM ID 794): "Drive. Check as soon as possible" illuminates. Increased ground cable contact resistance at Electrical Machine Electronics (EME) due to corrosion/oxidation.
B0902202020-09-14. Service bulletin. ELECTRICAL SYSTEM. REMOTE SOFTWARE UPGRADE: For BMW, Remote Software Upgrade (RSU) is the next consequent step with regard to digitalization and customer satisfaction. With the introduction of RSU, customers now can update the vehicle software by themselves.
B0902182020-09-14. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM. NEW ECU VALIDATION NEEDED AFTER REPLACING CERTAIN CONTROL MODULES: With introduction of the new Headunit HU-H3 (MGU Media Graphics Unit), there is a new protection mechanism against tampering. If one or more of the following components needs to be replaced, the secure connection between them must be re-established: MGU TCB Telematic Communication Box (ATM-02) RSE Rear Seat Entertainment and/or KOMBISP18 instrument cluster Prior to re-establishing this connection, an electronic certificate must be created in the BMW backend for importing into the Vehicle. After the replacement of one of the mentioned Modules, the Control Module needs a valid certificate for it to communicate with the other Modules.
B8404202020-08-31. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. SERVICE ACTION - PROGRAM TELEMATICS MODULE: A software error in the telematics control unit can result in an interruption in communication between the vehicle and the back end (BMW server). Software error in the Advanced Telematics Module (ATM).
B6512202020-08-31. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. BMW CONNECTEDDRIVE APPS ARE NO LONGER AVAILABLE AFTER PROGRAMMING: After programming vehicle with "20-03" software, BMW ConnecedDrive apps are no longer available in the head unit. Software in the Head Unit High (HU-H3).
B6507092020-08-31. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. NAVIGATION SYSTEM - REPORTING MISSING OR INCORRECT ROADMAP DATA: Do not replace parts and do not program the vehicle. Roads can change by up to 15% every year. To ensure the best navigation experience, we do everything in our power to create the best maps. Your reports help us to detect changes in your area and keep future versions of our maps as accurate as possible. Therefore, a road map error or missing data must be reported directly to the map supplier.
B6201192020-08-31. Service bulletin. EQUIPMENT:ELECTRICAL. INSTRUMENT CLUSTER AND ONBOARD COMPUTER INTERMITTENTLY INOPERATIVE: The audio source, radio station, or music track cannot be changed using the MFL. Normal functionality may possibly return after a sleep cycle or a battery reset. This affects vehicles with: Integration level S18A-18-11-5xx Live Cockpit Professional (option code 6U3) including the instrument cluster High 4.1. While the Kombi is not working properly the rest of the system is working properly. The customer can still use the Central Information Display (CID) for items such as entertainment settings, Driver Experience settings, etc, utilizing the I drive controller. The telephone functions are not affected. Unfavorable software at system start-up.
B6116202020-08-31. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. SERVICE ACTION - REWORKING THE HIGH-VOLTAGE SYSTEM CONNECTOR: The sealing plugs (aka sealing grommets) on the low-voltage connector to the high-voltage battery were incorrectly mounted. The white-colored plugs seal off the individual wire chambers in the connector.
B6115202020-08-31. Service bulletin. STRUCTURE; ELECTRICAL SYSTEM. DELIVERY STOP - TRUNK LOCK SWITCH WIRING HARNESS: BMW AG has issued a Delivery Stop (effective June 5, 2020) on a small number of Model Year 2020 BMW 3 Series vehicles that were produced on March 25, 2020 and March 26,2020. The wiring harness from the Body Domain Controller (BDC) to the hotel setting switch is missing. 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. The wire from the Body Domain Controller (BDC) to the wiring harness connector leading to the hotel position switch is missing.
B6104192020-08-31. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. VEHICLE DOES NOT START BATTERY TOTALLY DISCHARGED: The customer's vehicle does not start due to a totally discharged battery.
B5401202020-08-31. Service bulletin. STRUCTURE. SERVICE ACTION - CHECK SUNROOF SEALING: The sunroof frame may not have been properly sealed, causing a water leak into the vehicle. Improper sealing during production.
B3406202020-08-31. Service bulletin. ELECTRICAL SYSTEM; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC). NOISE FROM DYNAMIC STABILITY CTRL(DSC)UNIT WHEN DRIVING RAPIDLY OVER SPEED BUMP: When driving rapidly over a speed bump, the following issues may arise: 1. DSC pump noise 2. Power output delayed for 1-2 seconds DSC software application.
B3405172020-08-31. Service bulletin. SERVICE BRAKES, HYDRAULIC; WHEELS. TICKING NOISE WHILE CORNERING WITHOUT THE BRAKES APPLIED: Ticking noise coming from front wheel while cornering without brakes applied, noticeable at low speeds. The vehicle must be moving.
B1603192020-08-31. Service bulletin. FUEL SYSTEM, GASOLINE. NOISES FROM THE FUEL TANK AT IDLE: All vehicles except the F48 (X1): While driving slowly with low RPM or while idling a faint knocking or fluttering noise can be heard from inside the fuel tank with a low fuel level (approximately less than 2 gallons). The customer may describe this noise as a "helicopter noise" from the rear of the vehicle. F48 (X1) only: While driving slowly with low RPM or while idling a faint knocking or fluttering noise can be heard from inside the fuel tank when the tank is full. The customer may describe this noise as a "helicopter noise" from the rear of the vehicle. CAUSE Pressure fluctuations from the tank ventilation valve will cause the fuel tank filler pipe non-return valve to vibrate. In some cases, the vibration can be heard inside the vehicle.
B6115202020-07-27. Service bulletin. ELECTRICAL SYSTEM; STRUCTURE. DELIVERY STOP: TRUNK LOCK SWITCH WIRING HARNESS: BMW AG has issued a Delivery Stop (effective June 5, 2020) on a small number of Model Year 2020 BMW 3 Series vehicles that were produced on March 25, 2020 and March 26,2020. The wiring harness from the Body Domain Controller (BDC) to the hotel setting switch is missing.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.