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Electrical system

2021 BMW 840I Electrical problems

No owner has filed a complaint about the 2021 BMW 840I's electrical system with NHTSA. Dead batteries, warning lights, wiring, alternators, infotainment and electronic module failures.

Complaints
0
Recalls
2
Crashes
0
Fires
0
Injuries
0
Deaths
0

Electrical recalls for the 2021 BMW 840I

Electrical system: starter assembly

25V644000145,102 vehicles affected

The problem
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.
The risk
An overheated starter motor can ignite nearby combustible material in the engine compartment, increasing the risk of a fire.
The 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.

Electrical system: 12v / 24v / 48v battery

20V761000812 vehicles affected

The problem
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 resistance at the connections.
The risk
Increased electrical resistance can increase the risk of a fire.
The 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.

Electrical complaints

No complaints about this area yet.

BMW 840I electrical complaints by year

840I electrical problems, every year

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Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data

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