2021 BMW M340I
Recalls, most-reported problems, crash-test ratings, fuel economy and what a 2021 BMW M340I is worth — from official NHTSA and EPA data. 112 on record.
2021 BMW M340I at a glance
Included: that car's specs and build sheet, model-year recall campaigns and a fair price.
2021 BMW M340I recalls 6
BMW of North America, LLC (BMW) is recalling certain 2019-2022 330i, 330i xDrive, M340i, 2022 430i Coupe, 2021-2022 430i, M440i Convertible, and 2020-2022 228i xDrive Gran Coupe vehicles. The receiver audio module control unit software may fail to properly generate audible seat belt warnings to the driver to fasten their seat belt. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle…
Fix: Dealers will update the receiver audio module software, free of charge. Owner notification letters were mailed October 12, 2023. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2019-2021 330i, 330i xDrive, M340i xDrive, 2020-2021 X3 sDrive30i, X3 xDrive30i, X3 M40i, X3M, 2021 X3 xDrive30e, X4 xDrive30i, and X4M vehicles. The seat frame may not have been welded properly to the seat rails.
Fix: Dealers will replace the seat frame and back rest, free of charge. Owner notification letters were mailed May 22, 2023. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2021 2 Series (230i, 230i xDrive, M240i, M240i xDrive), 330e, 330e Xdrive, 4 Series Coupe (430i, 430i xDrive, M440i xDrive) M4 Coupe, M4 Competition Coupe, BMW 4 Series Convertible (430i, M440i), BMW X1 sDrive28i, xDrive28i, 2 Series Gran Coupe (228i, 228i xDrive, M235i xDrive), M2 Competition Coupe, 330i, 330i xDrive, M340i, M340i xDrive, M3, M3 Competition, 530i…
Fix: Dealers will inspect the seat belt retractors (including the seat belts) and, if necessary, replace the retractors, free of charge. Owner notification letters were mailed on September 3, 2021. Owners may contact BMW customer service at 1-800-525-7417; 1-866-825-1525 (MINI); 1-877-877-3735 (Rolls Ro…
BMW of North America, LLC (BMW) is recalling certain 2021 330i, 330i xDrive, M340i, M3, and 330e xDrive vehicles. The bolt securing the seat belt assembly to the frame was not tightened to specification.
Fix: BMW will notify owners, and dealers will inspect the front seat belt buckle assembly connection and, if necessary, replace it, free of charge. Owner notification letters were mailed on June 25, 2021. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2019-2021 X3 sDrive30i, X3 xDrive30i, X3 M40i, X3M, X4 xDrive30i, X4 M40i, M550i, X4M, X5 sDrive40i, X5 xDrive40i, X5 xDrive50i, X5M, X5 M50i, X7 xDrive40i, X7 xDrive50i, X7 M50i, Alpina XB7, 330i, 330i xDrive, M340i, M340i xDrive, and 8 Series Coupe, Convertible and Grand Coupe, 840i, 840i xDrive, M850i xDrive, M8, 2020-2021 530e, 530e xDrive, 330e, 330e xDrive, …
Fix: BMW will notify owners, and dealers will inspect the rearview camera software and update it if necessary, free of charge. The recall began April 16, 2021. Owners may contact BMW customer service at 1-800-525-7417.
BMW of North America, LLC (BMW) is recalling certain 2021 M340i xDrive, M440i xDrive Coupe, 530i, 530i xDrive, 540i, 540i xDrive, 740Li, 740Li xDrive, 840i Gran Coupe, 840i xDrive Gran Coupe, X5 sDrive40i, X5 xDrive40i, X6 sDrive40i, X6 xDrive40i, and X7 xDrive40i vehicles. The connection between the 48-Volt battery and the starter-generator may not have been assembled properly, which can cause increased electrical …
Fix: BMW will notify owners, and dealers will inspect the connection between the 48-Volt battery and the starter-generator assembly, replacing it if necessary, free of charge. The recall is expected to begin April 12, 2021. Owners may contact BMW customer service at 1-800-525-7417.
Source: U.S. NHTSA, checked 4 Nov 2026. A campaign covers the model year; to see whether a particular car still needs the repair, check its VIN on NHTSA.gov or ask a franchised dealer.
2021 BMW M340I common problems
The most-reported problem areas across all 11 owner complaints filed with NHTSA — and what to check before you buy.
2021 BMW M340I MPG & running costs
Source: U.S. EPA / DOE fueleconomy.gov.
Estimated 5-year cost to own
A rough guide to what running a 2021 BMW M340I costs over five years and 75,000 miles.
How this is estimated: fuel is the U.S. EPA annual cost at 15,000 miles a year. There aren't enough comparable listings to estimate depreciation for this model, so it is left out. Not included: insurance, maintenance, repairs, taxes, registration and finance costs. Treat it as a comparison guide, not a quote.
Investigations & service bulletins
NHTSA defect investigations 1
Pedestrian alert sounds Closed
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that…
NHTSA #DP22005 · Electrical System · opened Jan 2023 · closed Aug 2023An investigation means NHTSA is examining a possible defect — it is not a recall, and many close without one.
Manufacturer service bulletins 183
Technical notes the manufacturer sent to dealers about known issues and fixes. Useful to mention to a mechanic — they are not recalls and repairs may not be covered. Showing the 10 most recent of 183.
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.
Bulletin B010325 · Structure · Apr 2025The 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 determ…
Bulletin B720225 · Electrical System, Air Bags · Apr 2025The 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 âÂÂdi…
Bulletin B611305 · Electrical System · Jan 2024Functional noises (squealing/honking) when braking shortly before the vehicle comes to a stop. CAUSE Material-
Bulletin B340714 · Service Brakes, Hydraulic · Oct 2023?A software error may cause an unwanted pressure pulsation in the transmission during a "Remote Engine Start."
Bulletin B240323 · Engine And Engine Cooling, Power Train · Aug 2023BMW 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 no…
Bulletin B240223 · Electrical System, Power Train · Jun 2023A 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…
Bulletin B160123 · Fuel System, Gasoline · Jun 2023With 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.
Bulletin B090221 · Electrical System · Jun 2023BMW 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.
Bulletin B120323 · Equipment · Jun 2023Condensation is present on the inner surfaces in one or both taillights (circled).
Bulletin B630321 · Exterior Lighting · Jun 2023Source: NHTSA Office of Defects Investigation, listed for the M340I. Model-year data, not specific to one car.
2021 BMW M340I vehicles on record
2021 BMW M340I3MW5U9J03N8C37069
2021 BMW M340IWBA5U91010FL60952
2021 BMW M340I3MW5U9J07M8C13825
2021 BMW M340IWBA5U91050FL53454
2021 BMW M340I3MW5U9J09M8C16077
2021 BMW M340IWBA5U91070FL50376
2021 BMW M340IWBA5U91060FL61482
2021 BMW M340IWBA5U91000FL04968
2021 BMW M340I3MW5U9J04N8C25013
2021 BMW M340I3MW5U7J09N8C48565
2021 BMW M340I3MW5U7J06M8B88002
2021 BMW M340IWBA5U91000FL70565
2021 BMW M340IWBA5U910X0FL82979
2021 BMW M340I3MW5U7J01N8C23319
2021 BMW M340I3MW5U9J00N8C40267
2021 BMW M340IWBA5U91040FL85778
2021 BMW M340IWBA5U91050FK94387
2021 BMW M340I3MW5U7J02M8C08097
2021 BMW M340IWBA5U7C0XMFL33109
2021 BMW M340I3MW5U9J04N8C32544
2021 BMW M340IWBA5U91000FL79282
2021 BMW M340I3MW5U7J00M8C10205
2021 BMW M340IWBA5U91090FK94148
2021 BMW M340IWBA5U91030FL61083