NHTSA (USA)Low Risk
At a glance
What can fail
This page covers 6 recalls and EPA fuel economy for the 2021 BMW M340i.
26 mpg combined
9 L/100km
Compact 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 2021 BMW M340i has 6 recalls, with the most serious concerns centered on occupant restraint: a seat frame that may not be properly welded to its rails can fail to hold an occupant in a crash, and a seatbelt mounting bolt that was not tightened to specification can allow the belt assembly to shift or give way when it is needed most.
Two additional seatbelt concerns round out the restraint cluster. A seatbelt retractor on certain vehicles may not function as intended during a crash, reducing the belt's ability to hold the occupant in place. There is also a software fault in the audio module that can prevent the driver's seatbelt reminder chime from sounding, removing a prompt that would otherwise encourage the driver to buckle up before moving.
On the electrical side, increased resistance in the 12-volt battery circuit can generate excess heat, raising the risk of a fire. The battery concern affects a broad range of BMW models built in the same model year, and the M340i is among them.
The final recall involves the rearview camera. A software error can cause the camera image to be missing or reduced while the vehicle is in reverse, leaving the driver without a full view of what is behind the car. If the driver relies on the camera alone rather than direct observation, a pedestrian or obstacle behind the vehicle could go unseen.
At a glance
What can fail
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The receiver audio module software may fail to produce audible seat belt warning alerts to the driver.
What the fix does
Dealers will update the receiver audio module software at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The seat frame may not be properly welded to the seat rails, which could affect seat stability.
What the fix does
Dealers will replace the seat frame and back rest at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The passenger seat belt retractor may unlock too early before the belt fully retracts, reducing crash protection.
What the fix does
Dealers will inspect and replace the seat belt retractors if needed, at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The bolt that attaches the seat belt assembly to the vehicle frame was not tightened to the correct specification, which could allow the seat belt to become loose.
What the fix does
Dealers will inspect the front seat belt buckle assembly connection and replace it if needed at no cost.
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 connection between the 48-volt battery and starter-generator may not be properly assembled, causing increased electrical resistance at the connection points.
What the fix does
Dealers will inspect the 48-volt battery and starter-generator connection and replace it if necessary, at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.