2016 BMW 640i Gran Coupe

The 2016 BMW 640i Gran Coupe is a luxurious four-door coupe known for its sleek styling, powerful performance, and comfortable ride. The 640i features a 3.0-liter turbocharged inline-6 engine, producing 315 horsepower and 330 lb-ft of torque. Other engine options for the 6 Series Gran Coupe include the 650i’s 4.4-liter twin-turbo V8 and the high-performance M6’s more powerful version of the same V8. All engines were paired with an 8-speed automatic transmission. Owners often praise the car’s elegant design, smooth driving experience, and well-appointed interior. Common criticisms include its high price, complex electronics, and relatively cramped rear seating compared to traditional sedans.

Engine

3.0L Turbocharged Inline-6 (N55)

• Oil Leaks
  • Description/Symptoms: Oil leaks can occur from various locations on the engine, 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 leaking gasket or seal.
  • Estimated Cost to Fix: $200 - $1000+ depending on the leak location and complexity.
• VANOS Solenoid Issues
  • Description/Symptoms: The Variable Valve Timing (VANOS) system can experience issues due to faulty solenoids. Symptoms include rough idling, decreased performance, and a check engine light with VANOS-related codes.
  • Solution: Replacing the faulty VANOS solenoid(s).
  • Estimated Cost to Fix: $200 - $500+
• Cooling System Problems
  • Description/Symptoms: Problems with the cooling system can include leaks from the water pump, thermostat housing, or radiator hoses. Overheating is a common symptom.
  • Solution: Replacing the faulty component, such as the water pump, thermostat, or hoses.
  • Estimated Cost to Fix: $300 - $1200+

Transmission

8-Speed Automatic (ZF 8HP)

• Mechatronic Unit Issues
  • Description/Symptoms: The mechatronic unit, which controls the transmission’s hydraulic functions, can experience failures. Symptoms include harsh shifting, delayed engagement, and transmission slipping.
  • Solution: Repairing or replacing the mechatronic unit. Sometimes flushing and replacing the transmission fluid can alleviate symptoms.
  • Estimated Cost to Fix: $800 - $3000+
• Valve Body Issues
  • Description/Symptoms: Worn valves in the valve body can cause delayed or erratic shifts.
  • Solution: Replacement of the valve body.
  • Estimated Cost to Fix: $800 - $2000+

Suspension

• Air Suspension Failure (if equipped)
  • Description/Symptoms: Some 640i Gran Coupes were equipped with air suspension. The air struts or air compressor can fail, leading to a sagging vehicle, uneven ride height, and a rough ride.
  • Solution: Replacing the faulty air strut(s) or air compressor.
  • Estimated Cost to Fix: $800 - $2000+ per strut/compressor.
• Adaptive Damper Issues (if equipped)
  • Description/Symptoms: If equipped with Adaptive Drive, the electronic dampers can fail. Symptoms include a rough or inconsistent ride, and error messages related to the suspension system.
  • Solution: Replacing the faulty damper(s).
  • Estimated Cost to Fix: $500 - $1500+ per damper.

Electrical

• iDrive System Issues
  • Description/Symptoms: The iDrive infotainment system can experience glitches, freezing, or complete failure.
  • Solution: Software updates, or replacement of the iDrive control unit.
  • Estimated Cost to Fix: $100 - $1000+ depending on the problem
• Battery Drain
  • Description/Symptoms: Excessive battery drain can occur due to faulty modules or parasitic draws. This can lead to a dead battery, especially if the car sits for extended periods.
  • Solution: Identifying and repairing the source of the battery drain. This could involve replacing a faulty module or repairing a wiring issue.
  • Estimated Cost to Fix: $100 - $800+
• Sensor Failures
  • Description/Symptoms: Various sensors can fail, triggering warning lights on the dashboard. Common culprits include oxygen sensors, mass airflow sensors, and wheel speed sensors.
  • Solution: Replacing the faulty sensor.
  • Estimated Cost to Fix: $100 - $500+ per sensor.

Exterior

• Adaptive Headlight Issues (if equipped)
  • Description/Symptoms: Adaptive headlights can experience issues with their self-leveling or cornering functions. Symptoms include error messages, headlights that are not properly aligned, or lights that do not adjust to corners.
  • Solution: Repairing or replacing the faulty headlight assembly or control module.
  • Estimated Cost to Fix: $500 - $2000+

Interior

• Seat Motor Failures
  • Description/Symptoms: The electric seat motors can fail, preventing the seats from adjusting properly.
  • Solution: Replacing the faulty seat motor or seat assembly.
  • Estimated Cost to Fix: $200 - $1000+
• Sunroof Issues
  • Description/Symptoms: The sunroof can experience issues with its motor, tracks, or seals. Symptoms include difficulty opening or closing the sunroof, excessive noise, or water leaks.
  • Solution: Repairing or replacing the faulty sunroof components.
  • Estimated Cost to Fix: $200 - $1200+

Recalls:

• Recall Number: 17V-764 - Incorrectly Welded Backrest
• Recall Number: 18V-633 - Engine Wiring Harness May Short Circuit
• Recall Number: 19V-686 - Front Seat Belt Retractor Not Locking Properly
• Recall Number: 20V-012 - Brake Vacuum Pump
• Recall Number: 21V-964 - Positive Crankcase Ventilation (PCV) Valve Heater May Short Circuit

Summary:

The 2016 BMW 640i Gran Coupe offers a luxurious and sporty driving experience, but potential owners should be aware of the common issues reported. Engine oil leaks, transmission mechatronic unit problems, and electrical glitches are among the more frequent concerns. Depending on the issue, the cost of repairs can range from a few hundred dollars to several thousand dollars. Air suspension and adaptive headlight problems can be particularly costly. Owners should also check for any outstanding recalls to ensure the vehicle is up-to-date on safety and performance related fixes.