I am filing this complaint regarding an ongoing safety issue with my 2021 BMW 740i involving the lane departure warning system, lane keep assist, and adaptive cruise control, all of which have stopped functioning properly. These features are critically tied to the windshield-mounted KAFAS camera, which I’ve now been told needs to be replaced. Initially, the BMW dealership attributed the issue to a software problem and charged me $500 for a software update. After the update, the driver assist systems remained non-functional. The dealership then diagnosed a failure with the front camera assembly and is now quoting me approximately $3,000 for replacement of the windshield and camera module. I have reviewed the federal safety agency Technical Service Bulletin SIB 66 08 23 (the federal safety agency ID: MC-10236236-9999), which outlines this exact issue, suggesting that BMW is aware of system limitations and hardware failures in this critical safety feature. However, this has not resulted in a recall or manufacturer-paid repair, despite the significant safety risk involved. I am requesting that the federal safety agency investigate this issue for the 2021 BMW 740i and similar BMW models equipped with the same KAFAS camera system. The sudden failure of key driver assistance systems—especially lane departure warning and adaptive cruise control—can lead to dangerous driving conditions, particularly on highways. I believe a recall or service campaign should be initiated requiring BMW to cover the cost of diagnosis and camera replacement due to the safety-critical nature of these systems. Please consider this complaint as a formal petition for further investigation and potential recall.
The worst 2021 BMW 740I problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Driver assistance1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Driver assistance1
Recalls 2
Engine and engine cooling: engine: engine control module (ecu/ECM): software
- What is wrong
- BMW of North America, LLC is recalling certain 2019-2020 X5, X7, 2020 3 Series Sedan, X6, 2020-2021 7 Series Sedan, 2020 8 Series Convertible, 8 Series Coupe, and 2020 8 Series Gran Coupe vehicles. Please see the recall report for the complete list of models. In the event the starter motor fails, repeated attempts to start the vehicle can cause the starter motor to overheat from an electrical overload.
- Risk
- A starter motor that overheats can ignite nearby combustible material in the engine compartment, increasing the risk of a fire.
- Remedy
- Dealers will update the vehicle software, free of charge. Owner notification letters were mailed September 27, 2024. Owners may contact BMW customer service at 1‑800‑525‑7417.
Recall number 24V576000 · Recall details
Back over prevention: software
- What is wrong
- 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, 745Le, 745Le xDrive, X5 xDrive45e, X3 xDrive30e, X6 sDrive40i, X6 xDrive40i, X6 xDrive50i, X6 M50i, X6M, 530i, 530i xDrive, 540i, 540i xDrive, M550i xDrive, M5, 740i, 740Li, 740Li xDrive, M760i Drive, M760Li xDrive, 750Li xDrive Alpina, Alpina B7 xDrive, and 2021 4 Series Coupe 430i, 430i xDrive, M440i xDrive vehicles. When shifting into Reverse, a small portion of the rearview image may be obscured, or the screen may not illuminate. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rear Visibility."
- Risk
- If the driver relies on only the rearview camera image, the missing or reduced rearview image view can increase the risk of a crash or injury.
- Remedy
- 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.
Recall number 21V096000 · Recall details
Technical service bulletins for the 2021 BMW 740I 157
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- The EVAP systems purge (vent) valve limited warranty for defects in materials or workmanship has been...
- The front and rear air suspension strut assemblies limited warranty for defects in materials or...
- The manual starting of electronic engine oil level measurement from inside the vehicle, usually...
- A check control message is displayed, indicating that the parking assistance systems have...
- Voluntary emissions recall 24E-A02: valvetronic
- BMW AG has issued a Delivery Stop (effective April 12, 2024) on certain Model Year 2023
- One or more of the LED daytime running lights are dim or discolored.
- The basic conditions for initializing the power windows are not met.
- The electrical system of BMW vehicles has been subject to an ongoing development process over the last few...
- At low outside temperatures (below 40 degrees F) and slow driving speeds (i.e. when parking,...
2021 BMW 740I fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 3.0L 6‑cyl | RWD | 22 | 29 | 25 |
What 2021 BMW 740I owners say
Most recent owner complaints, unedited.
Compare the 2021 BMW 740I
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Questions about the 2021 BMW 740I
Is the 2021 BMW 740I reliable?
Owners have filed 1 complaint about the 2021 BMW 740I, fewer than a typical 740I model year.
What is the most common problem with the 2021 BMW 740I?
Driver assistance and stability, with 1 complaint.
How many recalls does the 2021 BMW 740I have?
2 recalls, covering engine and engine cooling and back over prevention.
Was there a recall on the 2021 BMW 740I driver assistance?
Yes, 1 recall: 21V096000. Check your VIN to see if your car still needs the free repair.
What gas mileage does the 2021 BMW 740I get?
Official estimates for the 2021 BMW 740I range from 25 mpg combined. The most efficient version (3.0L 6-cyl, RWD) gets 22 city and 29 highway.
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