NHTSA (USA)Critical
At a glance
What can fail
The starter motor may overheat due to electrical overload after repeated starting attempts.
What the fix does
The engine starter will be replaced at no cost to you.
This page covers 5 recalls and EPA fuel economy for the 2020 BMW 840i.
25 mpg combined
9.4 L/100km
Subcompact Cars
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted.
The 2020 BMW 840i has 5 recalls, the most serious being a fire risk: the starter motor can overheat from electrical overload and ignite nearby materials in the engine compartment.
A related recall addresses the same fire risk through a software update to the engine control module, limiting the conditions under which the starter can overheat. On the safety equipment side, the seatbelt pretensioners and airbags may deploy improperly in a crash, raising the risk of injury to the driver and front passenger. The braking system also has a concern: a fault in the hydraulic brake assist can cause the anti-lock brakes to stop functioning and reduce overall braking force, making it harder to stop in an emergency. Finally, a software issue can cause the rearview camera image to disappear or show a reduced view while reversing, leaving the driver without a full picture of what is behind the vehicle.
At a glance
What can fail
The starter motor may overheat due to electrical overload after repeated starting attempts.
What the fix does
The engine starter will be replaced at no cost to you.
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Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The starter motor may fail, and repeated start attempts can cause it to overheat from electrical overload.
What the fix does
Dealers will update the vehicle software at no charge to prevent starter overheating.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
When shifting into Reverse, the rearview camera display may show a partially obscured image or fail to illuminate, reducing rear visibility.
What the fix does
Dealers will inspect and update the rearview camera software as needed at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The rotor and shaft inside the brake system may not be properly welded and could separate during hard braking, causing loss of ABS and braking assistance.
What the fix does
Dealers will replace the integrated brake system at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
Front seat belt buckle sensors may incorrectly read a buckled occupant as unbuckled, which could cause airbags and seat belt pretensioners to deploy improperly during a crash.
What the fix does
Dealers will inspect and replace the front seat belt buckles as needed at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.