2015 BMW 640i xDrive

The 2015 BMW 640i xDrive is a luxury grand tourer that offers a blend of performance and comfort. The 640i xDrive is equipped with a 3.0-liter turbocharged inline-6 engine producing 315 horsepower and 330 lb-ft of torque. It’s paired with an 8-speed automatic transmission. The 640i lineup also includes the 650i with a more powerful V8 engine. Owners appreciate the 640i xDrive for its stylish design, comfortable ride, and responsive handling. However, some common complaints include the high cost of maintenance and repairs, as well as potential issues with electrical components and oil leaks.

Engine

3.0L Turbocharged Inline-6 (N55)

• Oil Filter Housing Gasket Leak
  • Description/Symptoms: Oil leaking from the oil filter housing, often dripping onto the exhaust manifold causing a burning oil smell. Visible oil accumulation around the oil filter housing.
  • Solution: Replace the oil filter housing gasket.
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found
• Valve Cover Gasket Leak
  • Description/Symptoms: Oil leaking from the valve cover gasket, potentially dripping onto the exhaust manifold causing a burning oil smell. Visible oil accumulation around the valve cover.
  • Solution: Replace the valve cover gasket.
  • Estimated Cost to Fix: $500 - $1000+
  • Recalls: None Found
• VANOS Solenoid Failure
  • Description/Symptoms: Engine running rough, reduced power, check engine light with VANOS-related fault codes.
  • Solution: Replace the faulty VANOS solenoid(s).
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Transmission

8-Speed Automatic (ZF 8HP)

• Mechatronic Sleeve Leak
  • Description/Symptoms: Transmission fluid leak near the transmission pan. Can cause shift issues or complete transmission failure if fluid level gets too low.
  • Solution: Replace the mechatronic sealing sleeve.
  • Estimated Cost to Fix: $500 - $1000+
  • Recalls: None Found
• Torque Converter Failure
  • Description/Symptoms: Shuddering or vibrations during acceleration, especially at low speeds. Transmission slipping.
  • Solution: Replace the torque converter.
  • Estimated Cost to Fix: $2000 - $4000+
  • Recalls: None Found

Suspension

• Air Suspension Compressor Failure (If Equipped)
  • Description/Symptoms: The rear of the vehicle sits lower than normal, rides harshly, or the compressor is running constantly. Error messages on the dashboard related to air suspension.
  • Solution: Replace the air suspension compressor.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• Control Arm Bushing Wear
  • Description/Symptoms: Clunking or rattling noises from the front or rear suspension, especially over bumps. Vague steering or poor handling.
  • Solution: Replace the worn control arm bushings or the entire control arm assembly.
  • Estimated Cost to Fix: $300 - $800+ per control arm
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: Car battery frequently drains, especially after sitting for a few days. Difficulty starting the vehicle.
  • Solution: Diagnose and repair the parasitic drain. Common causes include faulty modules, aftermarket accessories, or a failing battery.
  • Estimated Cost to Fix: $100 - $500+ (depending on the cause)
  • Recalls: None Found
• iDrive System Issues
  • Description/Symptoms: The iDrive screen freezes, reboots randomly, or displays error messages. Navigation system malfunctions.
  • Solution: Software update. If this does not fix the issue, the head unit might need to be replaced.
  • Estimated Cost to Fix: $100 - $200+ for a software update. $1000+ for head unit replacement
  • Recalls: None Found
• Comfort Access System Malfunctions
  • Description/Symptoms: Key fob not recognized, difficulty locking/unlocking doors using the comfort access feature, or the vehicle not starting.
  • Solution: Check/replace the key fob battery. Diagnose/replace the comfort access antenna or module.
  • Estimated Cost to Fix: $5 - $10 for key fob battery. $200 - $800+ for antenna/module replacement.
  • Recalls: None Found

Exterior

• Adaptive Headlight Failure
  • Description/Symptoms: The adaptive headlights do not move or adjust properly. Error messages on the dashboard related to headlight malfunction.
  • Solution: Diagnose and replace the faulty headlight module or motor.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found
• Door Handle Issues
  • Description/Symptoms: The door handle fails to extend or retract properly.
  • Solution: Replace the door handle.
  • Estimated Cost to Fix: $500 - $1000+
  • Recalls: None Found

Interior

• Seat Heater Malfunction
  • Description/Symptoms: Seat heater does not turn on, or only heats partially.
  • Solution: Replace the seat heater element or control module.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Summary

The 2015 BMW 640i xDrive, while a luxurious and enjoyable vehicle, is prone to some common issues that owners should be aware of. Engine oil leaks, transmission problems, and electrical malfunctions are the most frequently reported issues. The cost of repairs can be significant, especially for transmission or electrical system components. Prospective buyers should have a pre-purchase inspection performed by a qualified mechanic to identify potential problems and assess the overall condition of the vehicle.