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2014 BMW 640i

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By Research the Car 4 min read

Here’s a breakdown of common issues and complaints associated with the 2014 BMW 640i, categorized for clarity and accuracy, following your specified format.

The 2014 BMW 640i is a luxury grand tourer known for its elegant design, powerful engine options, and comfortable ride. It’s available as a coupe, convertible (Convertible), and a four-door coupe (Gran Coupe). The model you’re asking about, the 640i, is equipped with a 3.0-liter turbocharged inline-6 engine producing 315 horsepower and 330 lb-ft of torque. Other engine options included a more powerful 4.4-liter turbocharged V8 in the 650i. The 640i is generally praised for its smooth engine performance and luxurious interior. However, common complaints often involve electrical glitches, oil leaks, and the cost of maintenance and repairs.

Engine

3.0L Turbocharged Inline-6 (N55)

  • Oil Filter Housing Gasket Leak
    • Description/Symptoms: Oil leak around the oil filter housing, often dripping onto other engine components. Burning oil smell, low oil level warning light.
    • Solution: Replacement of the oil filter housing gasket.
    • Estimated Cost to Fix: $300 - $500+
    • Recalls: None Found
  • Valve Cover Gasket Leak
    • Description/Symptoms: Oil leak around the valve cover, leading to burning oil smells and potential oil drips.
    • Solution: Replacement of the valve cover gasket and bolts.
    • Estimated Cost to Fix: $500 - $800+
    • Recalls: None Found
  • VANOS Solenoid Issues
    • Description/Symptoms: Rough idling, loss of power, engine hesitation, check engine light with VANOS-related codes.
    • Solution: Replacement of faulty VANOS solenoids.
    • Estimated Cost to Fix: $300 - $600+ per solenoid.
    • Recalls: None Found

Transmission

8-Speed Automatic (ZF 8HP)

  • Mechatronic Sleeve Leak
    • Description/Symptoms: Transmission fluid leak from the mechatronic sleeve where the wiring harness connects to the transmission. Can cause shifting problems or transmission malfunction.
    • Solution: Replacement of the mechatronic sleeve and fluid service.
    • Estimated Cost to Fix: $500 - $900+
    • Recalls: None Found
  • Valve Body Issues
    • Description/Symptoms: Harsh shifting, delayed engagement, slipping between gears, or complete loss of gear.
    • Solution: Replacement of the valve body or, in some cases, complete transmission replacement.
    • Estimated Cost to Fix: $1,500 - $5,000+ (depending on repair vs. replacement)
    • Recalls: None Found

Suspension

  • Adaptive Suspension Malfunctions (if equipped)
    • Description/Symptoms: Stiff or bouncy ride, error messages related to the suspension system, uneven ride height.
    • Solution: Diagnosis and replacement of faulty sensors, actuators, or shock absorbers.
    • Estimated Cost to Fix: $500 - $2000+ per component, depending on what needs replacement.
    • Recalls: None Found

Electrical

  • Battery Drain Issues
    • Description/Symptoms: The car battery drains quickly, especially when the vehicle is not driven frequently. Can lead to starting problems.
    • Solution: Diagnosis and repair of parasitic draws, replacement of faulty modules that are not going to sleep properly, or replacement of the battery.
    • Estimated Cost to Fix: $200 - $800+ (depending on the source of the drain)
    • Recalls: None Found
  • iDrive System Malfunctions
    • Description/Symptoms: Freezing, rebooting, or complete failure of the iDrive system.
    • Solution: Software update, replacement of the iDrive control unit.
    • Estimated Cost to Fix: $300 - $1500+
    • Recalls: None Found
  • Parking Sensor Issues
    • Description/Symptoms: Parking sensors not working or giving false readings.
    • Solution: Replacement of faulty parking sensors.
    • Estimated Cost to Fix: $150-$500+ per sensor, depending on location and part.
    • Recalls: None Found

Exterior

  • Door Handle Issues (Comfort Access)
    • Description/Symptoms: Door handles failing to open or close properly, especially with the comfort access feature.
    • Solution: Replacement of the door handle actuator.
    • Estimated Cost to Fix: $400 - $800+ per handle
    • Recalls: None Found

Interior

  • Sunroof Issues
    • Description/Symptoms: Sunroof failing to open or close correctly, making excessive noise, or leaking.
    • Solution: Cleaning and lubrication of tracks, replacement of sunroof motor or other components.
    • Estimated Cost to Fix: $300 - $1000+
    • Recalls: None Found
  • Seat Motor Malfunctions
    • Description/Symptoms: Power seats failing to adjust properly or at all.
    • Solution: Replacement of faulty seat motors or switches.
    • Estimated Cost to Fix: $300 - $800+ per motor.
    • Recalls: None Found

Summary

The 2014 BMW 640i, while offering a luxurious driving experience, can present owners with several potential issues. The most common problems revolve around oil leaks from engine gaskets, transmission issues (particularly with the mechatronic sleeve and valve body), and electrical glitches. The severity of these issues ranges from minor inconveniences to potentially costly repairs. Maintaining this vehicle can be expensive, especially if adaptive suspension or complex electrical systems require attention. Potential buyers should carefully inspect the car for signs of these common issues and factor in higher maintenance costs when considering a purchase.

BMW, 640i
BMW 640i 2014
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