2018 BMW 640i xDrive

The 2018 BMW 640i xDrive is a luxury grand tourer known for its sleek styling, comfortable ride, and powerful engine. The 640i xDrive comes equipped with a 3.0-liter inline-6 turbocharged engine producing 315 horsepower and 330 lb-ft of torque. Other engine options available in the 6 Series include a 4.4-liter V8 in the 650i and a diesel option in some markets. All engines are paired with an 8-speed automatic transmission. Owners appreciate the car’s comfortable interior, smooth ride, and strong acceleration. Common dislikes include the high price, somewhat cramped rear seats, and the complexity of the iDrive infotainment system.

Engine

3.0L Inline-6 Turbocharged (B58)

• Oil Filter Housing Gasket Leak
  • Description/Symptoms: Oil leak from the oil filter housing, visible oil on the engine block near the filter housing, burning oil smell, low oil level warning.
  • Solution: Replace the oil filter housing gasket.
  • Estimated Cost to Fix: $300 - $500+
  • Recalls: None Found
• Coolant Leaks
  • Description/Symptoms: Coolant leaks from the engine, visible coolant on the ground, overheating, low coolant level warning.
  • Solution: Inspect all of the coolant lines and replace any components that are leaking.
  • Estimated Cost to Fix: $100 - $200+
  • Recalls: None Found

Transmission

8-Speed Automatic (ZF 8HP)

• Rough Shifting
  • Description/Symptoms: Harsh or jerky shifts, especially between lower gears. Can be more noticeable when the transmission is cold.
  • Solution: Some owners have reported improvement with a transmission fluid flush and filter replacement. If the issue persists, valve body replacement or transmission rebuild might be necessary.
  • Estimated Cost to Fix: $400 - $800+ (fluid flush), $1,500 - $3,000+ (valve body/rebuild)
  • Recalls: None Found

Suspension

• Air Suspension Malfunction (if equipped)
  • Description/Symptoms: Vehicle sitting unevenly, suspension warning lights, compressor failing to inflate air springs.
  • Solution: Diagnose and replace faulty air springs, compressor, or ride height sensors.
  • Estimated Cost to Fix: $500 - $1500+ per component.
  • Recalls: None Found

Electrical

• iDrive Infotainment System Issues
  • Description/Symptoms: Screen freezing, system rebooting, navigation errors, Bluetooth connectivity problems.
  • Solution: Software update, replacement of the iDrive control unit.
  • Estimated Cost to Fix: $200 - $500+ (software), $1000+ (control unit)
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: Car fails to start, frequent jump starts needed, electrical components malfunctioning, car not starting after sitting for a few days.
  • Solution: Diagnose and repair parasitic drain (faulty module, wiring issue), replace battery if necessary.
  • Estimated Cost to Fix: $150 - $300+ (battery replacement), $100+ (diagnostic and repair of drain)
  • Recalls: None Found

Exterior

• Door Handle Issues (Comfort Access)
  • Description/Symptoms: Door handle failing to unlock or lock the door using the comfort access feature.
  • Solution: Replace the faulty door handle actuator or sensor.
  • Estimated Cost to Fix: $300 - $600+ per handle
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof not opening or closing properly, making excessive noise, getting stuck, sunroof motor failing.
  • Solution: Repair or replace sunroof motor, realign tracks, replace damaged components.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Summary

The 2018 BMW 640i xDrive, while luxurious and enjoyable to drive, has a few common issues to be aware of. Engine oil leaks and coolant leaks can be problematic and need to be addressed to prevent more serious damage. The 8-speed transmission can exhibit rough shifting, requiring potential maintenance. Electrical issues, especially with the iDrive system and battery drain, are also fairly common. Air suspension issues can be costly if equipped. Overall, while not exhibiting widespread catastrophic failures, the potential repair costs for these issues can range from a few hundred to several thousand dollars, highlighting the importance of regular maintenance and inspection.