# Service bulletins for the 2020 BMW M340i 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. 251 bulletins from NHTSA, as of 2026-10-19. - [B010325](/bulletins/11017103.md), 2025-04-18, Warranty extension: STRUCTURE:BODY. 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. - [B611305](/bulletins/10249027.md), 2024-02-01, Service bulletin: ELECTRICAL 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. - [B340714](/bulletins/10244237.md), 2023-11-01, Service bulletin: SERVICE BRAKES, HYDRAULIC. Functional noises \(squealing/honking\) when braking shortly before the vehicle comes to a stop. CAUSE Material\- - [B240323](/bulletins/10242688.md), 2023-09-25, Service bulletin: ENGINE AND ENGINE COOLING; POWER TRAIN. ?A software error may cause an unwanted pressure pulsation in the transmission during a "Remote Engine Start." - [B410323](/bulletins/10241366.md), 2023-08-28, Service bulletin: SUSPENSION. The left front suspension's aluminum strut dome \(general area circled\) was incorrectly riveted to the body's wheel\-well. - [B630821](/bulletins/10239611.md), 2023-07-24, Service bulletin: EXTERIOR 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 - [B630321](/bulletins/10239610.md), 2023-07-24, Service bulletin: EXTERIOR LIGHTING:TAIL LIGHTS. Condensation is present on the inner surfaces in one or both taillights \(circled\). - [B611320](/bulletins/10239608.md), 2023-07-24, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT. In the event of an accident, the two\-battery Dual Storage System \(DSS\) is disconnected from the electrical system via an internal relay. - [B240223](/bulletins/10239603.md), 2023-07-24, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE. 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. - [B160123](/bulletins/10239602.md), 2023-07-24, Service bulletin: FUEL SYSTEM, GASOLINE. 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. - [B120323](/bulletins/10239601.md), 2023-07-24, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 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. - [B090221](/bulletins/10239599.md), 2023-07-24, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. 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. - [B610123](/bulletins/10238083.md), 2023-06-26, Service bulletin: ELECTRICAL 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. - [B514616](/bulletins/10238081.md), 2023-06-26, Service bulletin: STRUCTURE:BODY:TAILGATE. Upon opening and closing the tailgate, a creaking/groaning sound can be heard from tailgate actuator. - [SIB660823](/bulletins/10236236.md), 2023-05-15, Service bulletin: ELECTRICAL SYSTEM:ADAS:HUD:CAMERA/SENSOR; ELECTRICAL SYSTEM:ADAS:DRIVER MONITORING:CAMERA/SENSOR. 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. - [SIB630322](/bulletins/10236233.md), 2023-05-15, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS; ELECTRICAL SYSTEM. When unlocking the vehicle, the welcome light in the headlight "lights up eratically." - [SIB120123](/bulletins/10236218.md), 2023-05-15, Service bulletin: ENGINE AND ENGINE 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. - [B841422](/bulletins/10235206.md), 2023-05-01, Service bulletin: LANE DEPARTURE:LANE KEEP:NAVIGATION SYSTEM/SOFTWARE; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM\(GLOBAL POSITIONING SYSTEM\). Customer is shown an incorrect GPS location in the vehicle \(i.e., Nav Map, coordinates\). - [B840822](/bulletins/10235205.md), 2023-05-01, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. 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. The Connected Drive voice services \(Concierge Call, BMW Assistance, and emergency call voice\) can no longer be used regionally in the US in vehicle with telematics control units ATM\-1 and TCB\-4G. Voice control of the vehicle and all other telephone \(paired mobile devices\) functions are not affected. Emergency call location data is unaffected. - [B651623](/bulletins/10235203.md), 2023-05-01, Service bulletin: EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Customer states there is no audio playback \(telephony, navigation, radio\) and system sounds \(PDC, turn indicators, acoustic signals\) may also have failed. - [B610923](/bulletins/10235196.md), 2023-05-01, Service bulletin: ELECTRICAL 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. - [B610123](/bulletins/10235191.md), 2023-05-01, Service bulletin: ELECTRICAL 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. - [B320123](/bulletins/10235180.md), 2023-05-01, Service bulletin: STEERING. When turning the steering wheel while stationary or when driving on uneven roads; cracking, creaking, or knocking noises may be heard. - [B260422](/bulletins/10235179.md), 2023-05-01, Service bulletin: ENGINE AND ENGINE 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. - [B240223](/bulletins/10235178.md), 2023-05-01, Service bulletin: POWER TRAIN. 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. More: [the next page](/v1/vehicles/2020_bmw_m340i/bulletins?cursor=2023-05-01_10235178) (JSON) JSON: [/v1/vehicles/2020_bmw_m340i/bulletins](/v1/vehicles/2020_bmw_m340i/bulletins) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%202020%20BMW%20M340i&page=https%3A%2F%2Fopen.wenmarpro.com%2Fmakes%2Fbmw%2Fm340i%2F2020%2Fbulletins&vehicle=2020%20BMW%20M340i)