2017 BMW 640i

The 2017 BMW 640i is a luxury grand tourer known for its sleek design, comfortable ride, and powerful engine. It offers a blend of performance and luxury, making it a desirable vehicle for many. However, it’s not without its potential issues. Common praises include its stylish appearance, comfortable interior, and strong acceleration. Common dislikes can be the high maintenance costs, cramped rear seating (especially in the coupe), and complex electronics. The 2017 640i is primarily powered by a 3.0L turbocharged inline-6 engine producing 315 horsepower and 332 lb-ft of torque. Other available engines in the 6 Series lineup include a more powerful inline-6 as well as a V8. All 640i models came standard with an 8-speed automatic transmission.

Engine

3.0L Turbocharged Inline-6 (N55)

• Oil Leaks
  • Description/Symptoms: Oil leaks from the valve cover gasket and/or the oil filter housing gasket. This can result in a burning oil smell, visible oil drips under the vehicle, and potentially low oil levels.
  • Solution: Replacing the valve cover gasket and/or oil filter housing gasket.
  • Estimated Cost to Fix: $200 - $600 depending on the source of the leak and if repairs are bundled.
  • Recalls: None Found
• Coolant Leaks
  • Description/Symptoms: Coolant leaks, often from the expansion tank, water pump, or various coolant hoses. This can lead to overheating and potential engine damage if not addressed.
  • Solution: Replacing the leaking component(s).
  • Estimated Cost to Fix: $150 - $800+ depending on the specific component and labor costs.
  • Recalls: None Found

Transmission

8-Speed Automatic (ZF 8HP)

• Harsh Shifting/Hesitation
  • Description/Symptoms: Some owners have reported experiencing harsh shifting, hesitation, or occasional “clunking” sounds during gear changes. This can be more noticeable at lower speeds or during aggressive acceleration.
  • Solution: In some cases, a software update for the transmission control module (TCM) can resolve the issue. In more severe cases, valve body replacement or transmission rebuild/replacement may be necessary.
  • Estimated Cost to Fix: $200 (for software update) to $3,000+ (for major repairs).
  • Recalls: None Found

Suspension

• Adaptive Suspension Malfunctions
  • Description/Symptoms: Models equipped with adaptive suspension (Dynamic Damper Control) may experience malfunctions, leading to a rough or uncomfortable ride. This could be due to faulty sensors or damaged dampers. Warning lights might illuminate on the dashboard.
  • Solution: Diagnosis of the specific issue (sensor or damper failure) and replacement of the faulty component.
  • Estimated Cost to Fix: $500 - $1500+ per damper or sensor, plus labor.
  • Recalls: None Found

Electrical

• iDrive System Issues
  • Description/Symptoms: The iDrive infotainment system can experience glitches, freezes, or unresponsive behavior. This may include issues with navigation, audio, or Bluetooth connectivity.
  • Solution: Restarting the iDrive system, performing a software update, or, in some cases, replacing the iDrive control unit.
  • Estimated Cost to Fix: $0 (restart or update) to $1,000+ (control unit replacement).
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: Premature battery drain due to parasitic draw. This can lead to the car not starting, especially after sitting for a period of time.
  • Solution: Identifying the source of the parasitic draw (often a faulty module or sensor) and repairing/replacing it. Battery replacement may also be necessary.
  • Estimated Cost to Fix: $150 - $500+ depending on the complexity of the issue.
  • Recalls: None Found

Exterior

• Door Handle Issues (Comfort Access)
  • Description/Symptoms: Some owners have reported issues with the Comfort Access door handles, where they fail to unlock or lock the vehicle properly. This can be due to faulty sensors within the handle.
  • Solution: Replacing the affected door handle.
  • Estimated Cost to Fix: $300 - $600 per door handle.
  • Recalls: None Found

Interior

• Seat Motor Failure
  • Description/Symptoms: Electric seat motors failing, causing the seat to become stuck in one position or only move intermittently.
  • Solution: Replacing the faulty seat motor(s).
  • Estimated Cost to Fix: $200 - $600+ depending on the motor and labor.
  • Recalls: None Found

Summary

The 2017 BMW 640i, while a luxurious and enjoyable vehicle, can be prone to certain issues. Engine oil leaks and coolant leaks are fairly common. Electrical problems like iDrive glitches and battery drain can also be frustrating. Suspension issues can be present if the car is equipped with Dynamic Damper Control. While many of these issues are not catastrophic, the repair costs can be significant, making it important to consider these potential expenses when evaluating a used 2017 640i. Prospective buyers should thoroughly inspect the vehicle, obtain a pre-purchase inspection from a qualified mechanic, and review the vehicle’s maintenance history.