2020 Bmw 340i problems, complaints & recalls
Safety recalls (1)
Electrical System:starter Assembly 2025-09-25 · campaign 25V644000 · 145,102 vehicles
Defect: BMW of North America, LLC (BMW) is recalling certain 2020 340I, X6, 2020-2025 840I, 2020-2022 740LI, 2019-2020 X7, and X5 vehicles. After repeated attempts, the starter motor may overheat from an electrical overload.
Risk: An overheated starter motor can ignite nearby combustible material in the engine compartment, increasing the risk of a fire.
Fix: Dealers will replace the engine starter, free of charge. This recall includes vehicles repaired under recall 24V576 and those owners will need to have their vehicle repaired again. Owner notification letters were mailed February 9, 2026. Owners may contact BMW customer service at 1-800-525-7417. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov November 17, 2025.
Service bulletins (60)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine 2026-05-05 · B010224 · Warranty Program/Extension
the evap systems purge (vent) valve 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.
Electrical System 2025-04-09 · B720225 · Warranty Program/Extension
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-serv
Engine And Engine Cooling 2024-03-04 · B120721 · Service Bulletin/Repair Instructions
check control message (ccm) indicates: (id 213): stop, exercising due care. voltage supply the service engine soon light is on with the following dme fault code: 21b209 - starter alternator / belt for 48v system (osa_riemen_riss): belt betweencombustion engine and starter generator torn and/or o
Visibility:defroster/Defogger/Hvac System 2024-02-16 · B640422 · Service Bulletin/Repair Instructions
an interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in thecenter of the instrument panel. the groaning noise always occurs when either a ventilation flap, air stratification flap or the recirculated airflap moves to a different position. due to the
Visibility:power Window Devices And Controls 2024-01-16 · B510819 · Service Bulletin/Repair Instructions
the basic conditions for initializing the power windows are not met.
Electrical System 2024-01-11 · B611305 · Service Bulletin/Repair Instructions
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 ã¢ââdischarged batteryã¢ââ complaints.
Showing the 6 most recent of 60 bulletins. Search all of them free at nhtsa.gov.
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.