2021 Bmw 840i
The 2021 Bmw 840i is a compact car, rated at 25 MPG combined by the EPA. NHTSA lists 4 recalls for this model year.

- Combined MPG
- 25
- NHTSA safety
- Not rated
- Starting price
- $89,000
- Recalls
- 4
Watch: 840i reviews
Full specifications
Identity
SRC · NHTSA vPIC| Make | Bmw |
|---|---|
| Model | 840i |
| Model year | 2021 |
| Vehicle class | Compact Car |
Engine & drivetrain
SRC · EPA FuelEconomy| Displacement | 3 L |
|---|---|
| Cylinders | 6 |
| Transmission | Automatic (S8) |
| Drivetrain | Rear-Wheel Drive |
| Fuel | Premium Gasoline |
Fuel economy
SRC · EPA FuelEconomy| City MPG | 22 |
|---|---|
| Highway MPG | 29 |
| Combined MPG | 25 |
| CO₂ tailpipe | 360 g/mi |
| EPA annual fuel cost | $3100 |
Available configurations
SRC · EPA FuelEconomy| 840i Convertible | 25 MPG combined |
|---|---|
| 840i Coupe | 25 MPG combined |
| 840i Gran Coupe | 25 MPG combined |
| 840i xDrive Convertible | 23 MPG combined |
| 840i xDrive Coupe | 23 MPG combined |
| 840i xDrive Gran Coupe | 23 MPG combined |
Fuel economy
SRC · EPA FuelEconomy| City | 22 MPG |
|---|---|
| Highway | 29 MPG |
| Combined | 25 MPG |
Efficiency vs class average
About 21% below the class average.
- Amount financed
- $80,100
- Total interest
- $13,935
Partner offers · may earn us a commission
≈ $1,608/yr · 12,000 mi/yr · $3.35/gal
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Cost to own
Estimate monthly payments and 5-year fuel cost using the tools in the sidebar. Figures use EPA fuel economy and current U.S. energy prices from EIA.
Safety ratings & recalls
SRC · NHTSA vPICNHTSA has not published NCAP crash-test ratings for this model year yet.
Recalls (4)
- ELECTRICAL SYSTEM:12V/24V/48V BATTERY20V761000 · 2020-12-09
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.
Remedy: 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.
- BACK OVER PREVENTION: SENSING SYSTEM: CAMERA21V096000 · 2021-02-19
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."
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.
- SERVICE BRAKES, HYDRAULIC21V062000 · 2021-02-10
BMW of North America, LLC (BMW) is recalling certain 2020-2021 8 Series Coupe, Grand Coupe and convertible 840i, 840i xDrive, M850i xDrive, M8 and 740 Li, 740 Li xDrive, 750 Li xDrive, M760 Li xDrive, X6 sDrive40i, X6 xDrive40i, X6 xdrive50i, X6 M50i, X6M, and 2019-2021 X5 sDrive40i, X5 xDrive40i, X5 xDrive50i, X5 M50i, X5M, X7 xDrive40i, X7 xDrive50i, X7 M50i, and 2021 M3, M3 Competition, M4 Coupe, M4 Competition Coupe, X5 xDrive45e, 745 Le xDrive. The rotor and shaft within the integrated brake system may not have been welded properly and could separate during a hard braking event, possibly resulting in a loss of the Antilock Brake System (ABS) and braking assistance.
Remedy: BMW will notify owners, and dealers will replace the integrated brake system, free of charge. Owner notification letters were mailed on May 25, 2021. Owners may contact BMW customer service at 1-800-525-7417.
- ELECTRICAL SYSTEM:STARTER ASSEMBLY25V644000 · 2025-09-25
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.
Remedy: 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.
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Frequently asked questions
What is the MPG of the 2021 Bmw 840i?
The 2021 Bmw 840i is EPA-rated at 25 MPG combined (22 city / 29 highway).
Is the 2021 Bmw 840i reliable?
NHTSA lists 4 recalls for the 2021 Bmw 840i. Recalls are repaired free of charge by the manufacturer — verify any open recalls by VIN before purchase.
How much does it cost to fuel the 2021 Bmw 840i?
At 12,000 miles per year, the 2021 Bmw 840i costs roughly $1,608 per year to fuel, or about $8,040 over 5 years at current U.S. energy prices.
What type of vehicle is the 2021 Bmw 840i?
The 2021 Bmw 840i is classified as a compact car. Common rivals in this class are worth comparing on price, MPG, and safety.
Sources: NHTSA vPIC · EPA FuelEconomy · NHTSA vPIC