2023 BMW 840i Gran Coupe

The 2023 BMW 840i Gran Coupe is a luxury four-door coupe that blends sporty performance with elegant styling and everyday practicality. The 840i Gran Coupe is powered by a 3.0-liter turbocharged inline-six engine, producing 335 horsepower and 369 lb-ft of torque. Other engine options for the 8 Series Gran Coupe include the M850i with a 4.4-liter twin-turbo V8 and the high-performance M8 with a more powerful version of the same V8. All engines are paired with an 8-speed automatic transmission. People generally appreciate the 840i Gran Coupe for its sleek design, comfortable and well-appointed interior, and engaging driving dynamics. Common dislikes include the high price point, limited rear headroom compared to traditional sedans, and some complex infotainment features.

Engine

3.0L Turbocharged Inline-Six

• Oil Filter Housing Leaks
  • Description/Symptoms: Oil leaks are observed near the oil filter housing, resulting in a burning oil smell and potential oil level drops.
  • Solution: Replacement of the oil filter housing gasket. In some cases, the entire housing may need to be replaced if it is warped or damaged.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Transmission

8-Speed Automatic

• Rough or delayed shifting
  • Description/Symptoms: Owners have reported experiencing rough or delayed shifting, particularly when the transmission is cold. Some have reported difficulty shifting into gear, or hesitation when accelerating.
  • Solution: In some cases, a software update to the transmission control module can resolve the issue. In other cases, the transmission valve body may need to be replaced.
  • Estimated Cost to Fix: $200 - $3,000+
  • Recalls: None Found

Electrical

• Infotainment System Freezing/Lagging
  • Description/Symptoms: The iDrive infotainment system occasionally freezes, lags, or becomes unresponsive. This can affect navigation, audio, and other vehicle functions.
  • Solution: Software updates from BMW can sometimes address these issues. In more severe cases, replacement of the iDrive control unit may be necessary.
  • Estimated Cost to Fix: $0 (Software Update) - $1,500+ (Control Unit Replacement)
  • Recalls: None Found
• Sensor Malfunctions (Parking Sensors, Blind Spot Monitoring)
  • Description/Symptoms: Intermittent failures or false alarms from parking sensors or blind spot monitoring systems.
  • Solution: Diagnosis to identify the faulty sensor, followed by replacement. Recalibration of the system may also be needed.
  • Estimated Cost to Fix: $200 - $600+ per sensor
  • Recalls: None Found

Interior

• Creaking/Rattling Noises
  • Description/Symptoms: Some owners have reported creaking or rattling noises emanating from the dashboard, door panels, or rear deck, particularly on rough roads.
  • Solution: Locating the source of the noise and applying felt tape, tightening fasteners, or replacing clips/fasteners as needed.
  • Estimated Cost to Fix: $100 - $500+ (depending on labor and parts)
  • Recalls: None Found

Exterior

• Malfunctioning Automatic Trunk Lid
  • Description/Symptoms: The automatic trunk lid may fail to open or close properly, or may stop mid-operation.
  • Solution: Inspecting and potentially replacing the trunk lid struts, motor, or sensors.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Summary

The 2023 BMW 840i Gran Coupe generally suffers from typical luxury car issues. Electrical issues related to the infotainment system and sensors are present, as well as mechanical issues with the engine and transmission that may be costly to fix. The issues are not overwhelmingly prevalent, but potential buyers should be aware and check for these symptoms during inspection and test drives.