2015 BMW 640i xDrive Gran Coupe

The 2015 BMW 640i xDrive Gran Coupe is a stylish and luxurious four-door coupe, known for its sleek design, comfortable ride, and powerful performance. The 640i xDrive Gran Coupe came standard with a 3.0-liter turbocharged inline-6 engine, producing 315 horsepower and 330 lb-ft of torque, paired with an 8-speed automatic transmission. Other engine options for the 2015 6 Series Gran Coupe included the 650i’s 4.4-liter twin-turbo V8 engine with 445 horsepower, also paired with the 8-speed automatic, and in some regions, a diesel engine. People generally like the car’s elegant styling, refined interior, and smooth driving experience. Common dislikes include the high cost of maintenance and repairs, as well as the limited rear headroom due to the sloping roofline.

Engine

3.0L Turbocharged Inline-6 (N55)

• Oil Filter Housing Gasket Leak
  • Description/Symptoms: The oil filter housing gasket can degrade over time, leading to oil leaks. Symptoms include visible oil leaks around the oil filter housing, oil consumption, and the smell of burning oil.
  • Solution: Replacement of the oil filter housing gasket.
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found
• Valve Cover Gasket Leak
  • Description/Symptoms: The valve cover gasket can harden and crack over time, leading to oil leaks. Symptoms include visible oil leaks around the valve cover, oil consumption, and the smell of burning oil.
  • Solution: Replacement of the valve cover gasket.
  • Estimated Cost to Fix: $500 - $900+
  • Recalls: None Found

Transmission

8-Speed Automatic (ZF 8HP45/8HP70)

• Rough Shifting/Hesitation
  • Description/Symptoms: Some owners have reported rough shifting, hesitation, or jerking during gear changes, particularly at lower speeds. This can be caused by worn valve body components, low transmission fluid, or software issues.
  • Solution: Depending on the cause, solutions can range from a transmission fluid flush and software update to valve body replacement. In severe cases, a complete transmission rebuild or replacement may be necessary.
  • Estimated Cost to Fix: $300 (fluid flush) - $1,500+ (valve body) - $4,000+ (transmission replacement)
  • Recalls: None Found

Suspension

• Air Suspension Failure (if equipped)
  • Description/Symptoms: The air suspension system (if equipped) can experience failures due to leaks in the air struts, a faulty air compressor, or issues with the ride height sensors. Symptoms include the vehicle sitting unevenly, a harsh ride, and error messages on the dashboard.
  • Solution: Replacement of the faulty air struts, air compressor, or ride height sensors.
  • Estimated Cost to Fix: $800 - $2,000+ per strut, $500 - $1,000+ for the compressor
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: Some owners have reported excessive battery drain, leading to difficulty starting the vehicle or a completely dead battery. This can be caused by a variety of factors, including a faulty alternator, parasitic draw from aftermarket accessories, or a failing battery.
  • Solution: Diagnosis and repair of the underlying cause of the battery drain. This may involve replacing the alternator, identifying and disconnecting aftermarket accessories, or replacing the battery.
  • Estimated Cost to Fix: $200 - $500+ (alternator), $100 - $300+ (battery), Variable depending on the source of parasitic draw
  • Recalls: None Found
• iDrive System Malfunctions
  • Description/Symptoms: The iDrive infotainment system can experience various malfunctions, including freezing, crashing, and unresponsive controls. These issues can be caused by software glitches or hardware failures.
  • Solution: Software updates, system resets, or replacement of the iDrive control unit.
  • Estimated Cost to Fix: $100 - $300 (software update), $500 - $1,500+ (control unit replacement)
  • Recalls: None Found

Exterior

• Door Handle Issues
  • Description/Symptoms: The exterior door handles can experience issues with the locking/unlocking mechanism or the comfort access feature (if equipped). This can result in difficulty opening or closing the doors.
  • Solution: Replacement of the faulty door handle or repair of the locking mechanism.
  • Estimated Cost to Fix: $300 - $800+ per door handle
  • Recalls: None Found

Interior

• Seat Motor Failure
  • Description/Symptoms: The seat motors that control seat adjustments can fail, leading to difficulty adjusting the seats.
  • Solution: Replacement of the faulty seat motor.
  • Estimated Cost to Fix: $300 - $700+ per motor
  • Recalls: None Found

Summary

The 2015 BMW 640i xDrive Gran Coupe, while a luxurious and enjoyable vehicle, does have some common issues that owners should be aware of. Engine issues such as oil leaks are fairly common and can be moderately expensive to repair. The transmission can experience shifting problems, which can range from minor inconveniences to requiring costly repairs. Suspension issues, particularly with the air suspension (if equipped), can also be expensive. Electrical problems, such as battery drain and iDrive malfunctions, can be frustrating. Overall, potential buyers should be prepared for the possibility of higher maintenance costs and should have the vehicle thoroughly inspected before purchase.