2021 BMW 840i Report
Known issues, recalls, running costs, and what to check before you buy.
Overall Score
Key Takeaways
- The 2021 BMW 840i is powered by a 3.0L turbocharged inline-six engine paired with an 8-speed automatic transmission and all-wheel drive.
- Fuel economy is rated at 20 MPG city and 27 MPG highway, contributing to potentially high fuel costs.
- Six recalls were issued, with critical concerns including the integrated brake system and the 48V battery/starter assembly.
- The integrated brake system recall (21V062000) involves a faulty weld that could lead to loss of braking assistance and ABS.
2021 BMW 840i
The 2021 BMW 840i presents a striking coupe (or convertible) profile with a potent turbocharged inline-six engine. It aims for the grand touring segment, balancing spirited driving dynamics with long-distance comfort. While its design and performance are undeniable draws, a significant number of safety-critical recalls, particularly concerning the brake system and electrical components, warrant careful consideration for used car shoppers. The absence of owner complaints in NHTSA data is noted, but does not entirely mitigate the risks highlighted by the recall history. Potential buyers should prioritize verifying recall completion and thoroughly inspecting these key areas.
Critical Failure Risk
Recalls indicate a critical failure mode where a faulty weld between the rotor and shaft could lead to separation during hard braking, causing loss of ABS and braking assistance. This is a safety-critical component.
Early detection can help you avoid a $2,000-$4,500 repair.
Safety & Bulletins
Owner Complaints
No primary complaint themes found.
Performance & Efficiency
Reliability
Practicality
The score is mainly limited by high fuel consumption, and limited seating.
Who This Car Is For
Best for
Discerning buyers prioritizing style and performance over absolute long-term mechanical certainty.
+2 more buyer-fit notes in the full report
Avoid if
Buyers seeking a completely worry-free ownership experience with minimal potential for unexpected repairs.
+2 more buyer-fit warnings in the full report
2021 BMW 840i Reliability Analysis
Explore comprehensive reliability data including official safety recalls, consumer complaints, and common mechanical failures for the 2021 BMW 840i.
Vehicle Specs
- Fuel Type
- Premium
- Seating Capacity
- 4
- Transmission
- Automatic
- Drivetrain
- All-Wheel Drive
- Body Style
- Chassis Cab
- EPA Combined MPG
- 23
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Most Common Issues
1. Integrated Brake System Failure
Most reportedUsage data observed
2. Starter Assembly Overheating/Failure
Usage data observed
First Service Interval
- Synthetic Oil Change and Filter Replacement (Parts: 5W-30 Synthetic Oil, Oil Filter) - Tire Rotation and Inspection - Brake System Inspection - Fluid Level Checks (Coolant, Brake, Washer)
Est. shop cost: $150 - $300
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FAQ
Is the 2021 BMW 840i reliable?
The CarFocal Reliability Score for the 2021 BMW 840i is 7.9/10. Reliability score is 7.9/10. NHTSA recalls: 6. Owner complaints: 0.
How practical is the 2021 BMW 840i for daily use?
Practicality score is 3.7/10. The score is mainly limited by high fuel consumption, and limited seating. EPA combined economy is 23 MPG. Seating capacity is 4.
What is the overall score for the 2021 BMW 840i?
The CarFocal Overall Score for the 2021 BMW 840i is 6.5/10. Overall score is 6.5/10 (Good). Confidence 55%. Maintenance 8.1/10. Practicality 3.7/10.
What does it cost to own and maintain a 2021 BMW 840i?
Based on Carfocal's data, First listed service: - Synthetic Oil Change and Filter Replacement (Parts: 5W-30 Synthetic Oil, Oil Filter) - Tire Rotation and Inspection - Brake System Inspection - Fluid Level Checks (Coolant, Brake, Washer) at 10,000 miles. Estimated first-year maintenance: $300 - $600. Repair prediction highlight: Integrated Brake System (typical at 50,000 miles, estimated cost Min: $2,000 • Max: $4,500).
What engine is in the 2021 BMW 840i?
Engine specs list 6 • 3.0.
What transmission does the 2021 BMW 840i use?
According to CarFocal's specs for the 2021 BMW 840i, transmission is Automatic. The paired drivetrain is All-Wheel Drive.
Does the 2021 840i require Premium gas?
Manufacturer fuel recommendation: Premium.
What is the combined EPA MPG for the 2021 BMW 840i?
EPA combined estimate is 23 MPG.
What driver assistance and safety features are available on the 2021 BMW 840i?
12 standard and 4 optional driver assistance features. Key features include Anti-lock Braking System, Electronic Stability Control, Traction Control.
How many people fit in a 2021 BMW 840i?
According to CarFocal's specs for the 2021 BMW 840i, seating capacity is 4.
What body style is the 2021 BMW 840i?
According to CarFocal's specs for the 2021 BMW 840i, body style is chassis_cab.
What drivetrain does the 2021 BMW 840i use?
According to CarFocal's specs for the 2021 BMW 840i, drivetrain is All-Wheel Drive. Transmission is Automatic.
Are there open safety recalls on the 2021 BMW 840i?
This model year has 6 official safety campaigns listed.