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Service bulletins for the 2020 BMW 840i

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.

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

Warranty extensions
B0115242026-08-03. ENGINE. The NVLD modules limited warranty for defects in materials and/or workmanship has been extended to 15 years / 150,000 miles as determined from the vehicles original in-service / first delivery date.
B0101262026-05-18. ENGINE. The EVAP systems purge (vent) valve 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.
B0101212024-11-25. ENGINE. For this vehicle, the engine coolant thermostat limited warranty for defects in materials or workmanship has been extended to 15 years/150,000 miles, as determined from the original in-service date.

A warranty extension may pay for a repair after the basic warranty has ended. Read the document for which vehicles and which repair it covers.

By type

By component

Bulletins, newest first
B1104262026-08-03. Service bulletin. ENGINE; ELECTRICAL SYSTEM. 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.
B0115242026-08-03. Warranty extension. ENGINE. The NVLD modules limited warranty for defects in materials and/or workmanship has been extended to 15 years / 150,000 miles as determined from the vehicles original in-service / first delivery date.
B8402262026-07-31. Service campaign. ELECTRICAL SYSTEM. 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.
B0101262026-05-18. Warranty extension. ENGINE. The EVAP systems purge (vent) valve 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.
B5211252025-08-24. Service bulletin. SEATS; ELECTRICAL SYSTEM. If the seat ventilation is deactivated via the switch or due to parking the vehicle, the fans in the seat cushionor under the seat cushion surface are unpleasantly loud. The fans speed up loudly twice and then turn off. The functionality of the fans is not impaired. This behavior only occurs after the vehicle had been programmed to I level S18A- 25-07-520 and higher; upto, but not including S18A- 25-07-551.
B2702202025-04-04. Service bulletin. POWER TRAIN; WHEELS. There is a jerking or shuddering during either or both of the following: Cornering or accelerating from low speeds Driving with low to medium loads There are no warning lights or Check Control messages.
B0101212024-11-25. Warranty extension. ENGINE. For this vehicle, the engine coolant thermostat limited warranty for defects in materials or workmanship has been extended to 15 years/150,000 miles, as determined from the original in-service date.
B6103212024-03-02. Service bulletin. ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE:STORAGE:EVAPORATIVE EMISSIONS:CANISTER; ELECTRICAL SYSTEM:SOFTWARE. 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.
B6607202024-03-02. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. 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. ELECTRICAL SYSTEM; EQUIPMENT. The functionality of the right rear SRR sensor could be reduced which would display the "Driving Assistance"- Check Control Message.
B5108192024-02-01. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; ELECTRICAL SYSTEM. The basic conditions for initializing the power windows are not met.
B6105242024-02-01. Service bulletin. EQUIPMENT:ELECTRICAL:INFOTAINMENT; ELECTRICAL SYSTEM. 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.
B6113052024-02-01. 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.
B5217232024-02-01. Service bulletin. ELECTRICAL SYSTEM; SEATS. Customer states one of the front seats is inoperative. The seat heater and power supply are inoperative. During the vehicle test, the seat module does not respond. The power supply fuse for the seat module isfound to have blown.
B3601212024-02-01. Service bulletin. STEERING. At low outside temperatures (below 40 degrees F) and slow driving speeds (i.e. when parking, maneuvering)with a large steering angle, the front end can be slightly axially misaligned. This can be felt (jerking)/ heard via an acoustic acknowledgement (clunk) as seen at the 11 second mark of the video. See attached video V36 01 21.
B3202232024-02-01. Service bulletin. STEERING. SITUATION Unusual noises occur only when operating the steering column in the axial direction. 1. A one-time thump sound at the start of movement Shortly after the steering column starts moving, retracting, or extending, a one-time thump noise is heard. See attached video V32 03 23 2. Humming noise while steering column extends in the axial direction. The sound is only heard when the steering column is extended, not when the steering column is retracted. When the steering column starts to move in the extended direction, the humming noise can be heard. See attached video V32 04 23
B1601232024-02-01. 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 0.5mm For: Model vehicles other that the ones listed above, or for EVAP faults related to a “large leak,” after confirming that the fuel filler cap is fitted properly, then, proceed to follow the corresponding test plan
B5132182023-12-06. Service bulletin. STRUCTURE. The paint finish on the door jamb (above the door striker) is scratched due to the inner door cavity window seal.
B5405212023-09-25. Service bulletin. STRUCTURE:BODY:ROOF AND PILLARS; VISIBILITY:SUN/MOON ROOF ASSEMBLY. ?The sunroof will not operate in either direction.
B3202232023-09-25. Service bulletin. STEERING. ?Unusual noises occur only when operating the steering column in the axial direction.
B8403232023-07-24. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. BMW AG has issued a Delivery Stop (effective February 9, 2023) on certain Model Year 2022 - 2023 BMW vehicles that were produced between June 29, 2022 and February 16, 2023.
B6408212023-07-24. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. The air conditioning cycles from cold to warm air while driving or while at a stand still. The vent outlet temperatures vary by 25 degrees Fahrenheit or more (38 F to 60 F +) without changing any climate control settings.
B6308212023-07-24. 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
B6303212023-07-24. Service bulletin. EXTERIOR LIGHTING:TAIL LIGHTS. Condensation is present on the inner surfaces in one or both taillights (circled).
B3204202023-07-24. Service bulletin. STEERING. A groaning type noise is heard during the height adjustment.

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