2014 BMW 640i Gran Coupe

The 2014 BMW 640i Gran Coupe is a stylish and luxurious four-door coupe. This model year offers a blend of performance and comfort, making it a desirable choice for many drivers. However, like any vehicle, it has its share of potential issues. Owners generally appreciate its sleek design, comfortable interior, and responsive handling. Some common complaints include the high cost of maintenance and repairs, as well as some electrical gremlins. The 2014 640i Gran Coupe is powered by a 3.0-liter turbocharged inline-6 engine producing 315 horsepower and 330 lb-ft of torque. Other engine options available were the 650i with a 4.4L twin-turbo V8 producing 445 horsepower and 480 lb-ft of torque, and a diesel engine for certain markets. All models typically came with an 8-speed automatic transmission.

Engine

3.0L Turbocharged Inline-6 (N55 Engine)

• Oil Leaks
  • Description/Symptoms: Oil leaks can develop from various locations, including the valve cover gasket, oil filter housing gasket, and oil pan gasket. Symptoms include visible oil leaks, a burning oil smell, and low oil levels.
  • Solution: Replacing the faulty gasket(s) and cleaning the affected areas.
  • Estimated Cost to Fix: $200 - $800+, depending on the location of the leak and labor costs.
  • Recalls: None Found
• VANOS Issues
  • Description/Symptoms: The Variable Valve Timing (VANOS) system can experience issues, leading to rough idling, reduced power, and potentially a check engine light. This can be caused by worn solenoids or faulty actuators.
  • Solution: Replacing the faulty VANOS solenoid(s) or actuators.
  • Estimated Cost to Fix: $300 - $1000+, depending on the specific component and labor.
  • Recalls: None Found
• Water Pump Failure
  • Description/Symptoms: The electric water pump is known to fail prematurely on the N55 engine. Symptoms include overheating, coolant leaks, and a check engine light.
  • Solution: Replacing the electric water pump and thermostat.
  • Estimated Cost to Fix: $600 - $1200+
  • Recalls: None Found

Transmission

8-Speed Automatic (ZF 8HP)

• Rough Shifting/Hesitation
  • Description/Symptoms: Some owners report experiencing rough shifting, particularly during downshifts, or hesitation when accelerating. This can be due to degraded transmission fluid, valve body issues, or software glitches.
  • Solution: Performing a transmission fluid flush and filter replacement, or potentially replacing the valve body. Software updates may also address the issue.
  • Estimated Cost to Fix: $300 - $2000+, depending on the severity and required repairs.
  • Recalls: None Found

Suspension

• Adaptive Damper Issues
  • Description/Symptoms: If equipped with adaptive dampers (Dynamic Damper Control), some owners report issues with the system, leading to uneven ride quality, error messages on the dashboard, or a generally uncomfortable driving experience. This can stem from faulty dampers or sensors.
  • Solution: Diagnosing and replacing the faulty damper(s) or sensor(s).
  • Estimated Cost to Fix: $800 - $2000+ per damper, depending on location and labor.
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: Excessive battery drain can occur due to a variety of reasons, including a faulty module not entering sleep mode, an aftermarket accessory drawing too much power, or a failing battery. Symptoms include a dead battery, difficulty starting the vehicle, and warning messages.
  • Solution: Diagnosing the source of the battery drain and repairing or replacing the faulty component.
  • Estimated Cost to Fix: $100 - $1000+, depending on the cause and required repairs.
  • Recalls: None Found
• iDrive Issues
  • Description/Symptoms: The iDrive infotainment system can experience glitches, freezing, or other software-related issues.
  • Solution: Performing a software update or, in some cases, replacing the iDrive control unit.
  • Estimated Cost to Fix: $100 - $1500+, depending on the solution.
  • Recalls: None Found

Exterior

• Door Handle Issues
  • Description/Symptoms: The Comfort Access system, which allows keyless entry and start, can sometimes malfunction, leading to door handles that do not respond or intermittent operation.
  • Solution: Replacing the faulty door handle or sensor.
  • Estimated Cost to Fix: $300 - $800+ per door handle.
  • Recalls: None Found

Interior

• Seat Motor Issues
  • Description/Symptoms: The motors that control the power seats may fail, resulting in the inability to adjust the seat position.
  • Solution: Replacing the faulty seat motor.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Summary

The 2014 BMW 640i Gran Coupe offers a compelling blend of style and performance, but potential buyers should be aware of some common issues. Engine oil leaks, VANOS issues, and water pump failures can lead to costly repairs. Transmission problems, suspension issues related to adaptive dampers, and electrical gremlins like battery drain or iDrive malfunctions are also potential concerns. While some issues are relatively minor and inexpensive to fix, others can be quite costly, so a thorough inspection is recommended before purchasing.