2021 BMW M340I Technical Service Bulletins

183 technical service bulletins (TSBs) are on record for the 2021 BMW M340I. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11017103Apr 15, 2025Body and structure. The Radiator Grilles Lower Active Air Flap Assembly limited warranty for defects in materials and/or workmanship has been extended to 15 years / 150,000 miles as determined from the original first in-service / delivery date.
• 11017100Apr 9, 2025Air bags, Electrical system. The Supplemental Restraint Systems (SRS) Front Passenger’s Seat Occupancy Capacitive Interior Sensor (CIS) Mat for defects in materials and/or workmanship that causes a false seat occupancy alert to occur has been extended to 10 years / 120,000 miles as determined from the vehicle's original in-service / first delivery date.
• 10249027Jan 11, 2024Electrical system. 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.
• 10244237Oct 13, 2023Brakes. Functional noises (squealing/honking) when braking shortly before the vehicle comes to a stop. CAUSE Material-
• 10242688Aug 1, 2023Engine cooling, Transmission and drivetrain. ?A software error may cause an unwanted pressure pulsation in the transmission during a "Remote Engine Start."
• 10239611Jun 1, 2023Exterior lighting, Electrical system. Headlight check control (CC) message 128 "High beam headlight failure" is displayed. The following fault codes are stored during a vehicle test: 80419A - Left high-beam headlight: Short circuit and/or 8041A5 - light outputs: Number of permitted short circuit cycles exceeded
• 10239610Jun 1, 2023Exterior lighting. Condensation is present on the inner surfaces in one or both taillights (circled).
• 10239603Jun 1, 2023Transmission and drivetrain, Electrical system. BMW AG has issued an Emissions Recall (effective March 17, 2023) on a certain Model Year 2021 - 2023 BMW vehicles that were produced between June 16, 2020, and December 13, 2022. Due to a software failure, there is the possibility that the transmission does not go into "sleep mode" if the car is turned off.
• 10239602Jun 1, 2023Fuel system. A vehicle arrives at your center to be diagnosed for a micro-leak in the fuel evaporative (EVAP) system (NVLD natural vacuum leak detection). For this condition, the following fault is stored in the DME: 190302 - fuel tank ventilation and scavenging air system, micro-leak: leakage more than 0.5 mm.
• 10239601Jun 1, 2023Equipment. BMW AG has issued a Delivery Stop effective June 6, 2023 on certain Model Year 2023 - 2024 BMW vehicles that were produced between October 26, 2022 and May 8, 2023.
• 10239599Jun 1, 2023Electrical system. With the introduction of the BMW Remote Software Upgrade, all Service Pack 18 vehicles and partial Service Pack 15 vehicles may receive new functionality or modifications in their features.
• 10238083May 1, 2023Electrical system. Due to a software error, the vehicle sporadically does not achieve sleep mode. As a result, the 12-volt battery becomes discharged and may cause a no-start condition.
• 10238081May 1, 2023Body and structure. Upon opening and closing the tailgate, a creaking/groaning sound can be heard from tailgate actuator.
• 10236236Apr 1, 2023Electrical system. 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.
• 10236233Apr 1, 2023Electrical system, Exterior lighting. When unlocking the vehicle, the welcome light in the headlight "lights up eratically."
• 10236218Apr 1, 2023Engine cooling. In hot ambient conditions, if the engine was running for a prolonged time while the vehicle is stationary, a jolt may be experienced while lightly accelerating.
• 10235206Mar 1, 2023Equipment, Lane departure. Customer is shown an incorrect GPS location in the vehicle (i.e., Nav Map, coordinates).
• 10235205Mar 1, 2023Electrical system, Equipment. The 3G network in the US has been shut down. This means that only the 4G network will be available. In the 4G network, voice calls will be transferred via the Voice over LTE (VoLTE) function. For this purpose, the SIM card must perform an IMS registration in the mobile communication network. Due to a production error, the telematics control units were delivered without an IMS configuration.
• 10235203Mar 1, 2023Equipment. Customer states there is no audio playback (telephony, navigation, radio) and system sounds (PDC, turn indicators, acoustic signals) may also have failed.
• 10235196Mar 1, 2023Electrical system. The gear selector switch (GWS) consists of the control electronics circuit and the selector lever. The sensors for recording the gearshift lever position and for inhibiting inadvertent gearshifts are integrated in the control electronics.
• 10235191Mar 1, 2023Electrical system. Due to a software error, the vehicle sporadically does not achieve sleep mode. As a result, the 12-volt battery becomes discharged and may cause a no-start condition.
• 10235180Mar 1, 2023Steering. When turning the steering wheel while stationary or when driving on uneven roads; cracking, creaking, or knocking noises may be heard.
• 10235179Mar 1, 2023Engine cooling. There is a howling or whistling noise from under the vehicle at 30 -37 mph (50 -60 km/h) when driving after a cold start, when the outside temperature is 32 F (0 C) or lower.
• 10235178Mar 1, 2023Transmission and drivetrain. BMW AG has issued a Delivery Stop: Due to a software failure, there is the possibility that the transmission does not go into "sleep mode" if the car is turned off.
• 10233169Feb 1, 2023Equipment, Electrical system. BMW AG has issued a Delivery Stop (effective October 25, 2021) on certain Model Year 2022 BMW vehicles that were produced after October 25, 2021. Due to supply chain limitations, certain vehicles were produced without a CID with touch function and and without Reversing Assistant.
• 10233166Feb 1, 2023Equipment, Electrical system. Due to component-related supply issues, the central information displays (CID) in some of the Model Year 2022 vehicles listed above were produced without the integrated touch screen function.
• 10233162Feb 1, 2023Electrical system, Equipment. Customer is unable to power up or charge accessories through a plug adapter inserted in the front 12-volt power socket plug. Alternatively, it will only operate when constant downward hand pressure is maintained.
• 10233157Feb 1, 2023Engine cooling, Transmission and drivetrain. There is a howling or whistling noise from under the vehicle at 30 -37 mph (50 -60 km/h) when driving after a cold start, when the outside temperature is 32 F (0 C) or lower. The noise goes away as the vehicle/driveline reaches operating temperature.
• 10230740Dec 1, 2022Equipment. Customer is shown an incorrect GPS location in the vehicle (i.e., Nav Map, coordinates).
• 10230739Dec 1, 2022Equipment. BMW AG has issued a Delivery Stop (effective November 10, 2022) on a small number of Model Year 2023 BMW vehicles that were produced between August 8, 2022 and October 18, 2022.
• 10230729Dec 1, 2022Latches, locks and linkages. Hood lever is pulled twice but the hood only achieves the pre-latch position on both sides.
• 10230726Dec 1, 2022Engine cooling. There is a howling or whistling noise from under the vehicle at 30 -37 mph (50 -60 km/h) when driving after a cold start, when the outside temperature is 32F (0C) or lower.
• 10230725Dec 1, 2022Body and structure. A cracking, metallic noise from under the center of the vehicle.
• 10228434Nov 1, 2022Electrical system. Customer is unable to power up or charge accessories through a plug adapter inserted in the front 12-volt power socket plug. Alternatively, it will only operate when constant downward hand pressure is maintained.
• 10227929Nov 1, 2022Electrical system, Lane departure, Air bags. 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…
• 10227575Oct 1, 2022Equipment. The customer complains that the radio stations change by themselves.
• 10227566Oct 1, 2022Other or unknown, Electrical system. After programming, the customer may complain that the Sport Mode display is not fully displayed in the instrument cluster. Instead of a red background in sport mode, the background is displayed in blue (like ECO PRO mode).
• 10227558Oct 1, 2022Visibility (wipers, defrost, mirrors). After opening the vehicle with the radio remote control and changing the profile, the exterior mirror settings are lost.
• 10227557Oct 1, 2022Electrical system. Customer is unable to power up or charge accessories through a plug adapter inserted in the front 12-volt power socket plug. Alternatively, it will only operate when constant downward hand pressure is maintained.
• 10225122Sep 1, 2022Engine cooling, Electrical system. On these Plug-in Hybrid Electric Vehicles (PHEV), the air conditioning cycles from cold to warm air while driving or while at a standstill. A rattling noise may also be heard coming from the electrical coolant condenser (EKMV).
• 10225121Sep 1, 2022Visibility (wipers, defrost, mirrors). An interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in the center of the instrument panel.
• 10225115Sep 1, 2022Electrical system. Customer is unable to power up or charge accessories through a plug adapter inserted in the front 12-volt power socket plug. Alternatively, it will only operate when constant downward hand pressure is maintained.
• 10224210Aug 1, 2022Equipment. The sound output intermittently drops out entirely. This can be reproduced with all audio sources as well as telephone and voice output.
• 10218380Jun 1, 2022Equipment, Electrical system. On these Plug-in Hybrid Electric Vehicles (PHEV), the air conditioning cycles from cold to warm air while driving or while at a standstill. The vent outlet temperatures vary by 25 degrees Fahrenheit or more (38 F to 60 F+; 3 to 15+ Celsius) without changing any climate control settings. A difference may be felt in cooling power compared from left to right. In some cases, the air conditioning may have stopped…
• 10218378Jun 1, 2022Engine cooling, Equipment. A rattling/droning noise is heard in the vehicle interior when the air conditioning (AC) is activated. Vibrations are felt in the driver's footwell.
• 10218373Jun 1, 2022Electrical system, Visibility (wipers, defrost, mirrors). Any or all of these conditions may be present: A. The exterior rearview mirror glass is discolored or cracked B. The power windows and folding mirrors may not operate C. One or more of the following LIN bus faults are stored in the BDC (Body Domain Controller): Faulty exterior rearview mirror electronics have created a short on the LIN bus, damaging the mirror glass and causing functional errors in power window and…
• 10218369Jun 1, 2022Body and structure. Whistling noise is heard coming from the front bumper while driving at highway speeds.
• 10218367Jun 1, 2022Tires. Starting mid-May 2022, the QR code on the tite sidewalls of Pirelli tires has been omitted due to patent reasons.
• 10215753May 1, 2022Tires, Exterior lighting, Equipment. The customer finds an indication in themyBMWapp that the tires need service due to wear. Even afterreplacing the tires, the tire service indicator is still present in the myBMW app.
• 10215750May 1, 2022Engine cooling, Electrical system. BMW offers a new special ISTA Installation made available for Roadside Assistance / Mobile Service technicians. The new ISTA Version is also able to be used in case of a Remote Software Upgrade (RSU) programming failure to get the customer car reprogrammed on site. In case of a Remote Software Upgrade failure, the engine start is prevented for safety reasons until the vehicle is programmed correctly. Most of the…

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