2015 Bentley Mulsanne

The 2015 Bentley Mulsanne is a hand-built ultra-luxury sedan known for its opulent interior, smooth ride, and powerful engine. It came equipped with a single engine option, a 6.75-liter twin-turbocharged V8 producing 505 horsepower and 752 lb-ft of torque, or 530 horsepower and 811 lb-ft of torque in the Speed variant. It was paired with an 8-speed automatic transmission manufactured by ZF. Owners often praise the Mulsanne for its unparalleled luxury, craftsmanship, and road presence. Common dislikes typically revolve around the high running costs, complex electronics, and potential for expensive repairs.

Engine

6.75L Twin-Turbocharged V8

• Oil Leaks
  • Description/Symptoms: Oil leaks can occur from various engine seals and gaskets, resulting in oil spots under the car and potential engine damage if left unattended.
  • Solution: Identify and replace the leaking seals or gaskets. Common areas include the valve cover gaskets, oil pan gasket, and rear main seal.
  • Estimated Cost to Fix: $500 - $3000+ depending on the location and complexity of the repair.
  • Recalls: None Found
• Turbocharger Issues
  • Description/Symptoms: Whining noises, reduced power, and potential engine warning lights can indicate turbocharger problems.
  • Solution: Diagnose the turbocharger for issues such as bearing failure or damaged impellers. Replacement or rebuild may be necessary.
  • Estimated Cost to Fix: $3000 - $8000+ per turbocharger, including labor.
  • Recalls: None Found
• Vacuum Leaks
  • Description/Symptoms: Rough idling, poor performance, and a check engine light can be caused by vacuum leaks in the engine’s intake system.
  • Solution: Inspect vacuum lines and intake components for leaks. Replace any damaged hoses or gaskets.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Transmission

ZF 8-Speed Automatic

• Harsh Shifting
  • Description/Symptoms: Jerky or abrupt gear changes, especially during low-speed operation, can occur.
  • Solution: A transmission fluid flush and filter change may alleviate the issue. In some cases, a software update or valve body repair might be required.
  • Estimated Cost to Fix: $300 - $2000+ depending on the complexity of the repair.
  • Recalls: None Found
• Delayed Engagement
  • Description/Symptoms: A noticeable delay between shifting into drive or reverse and the car actually moving.
  • Solution: Could be low transmission fluid, or more serious internal transmission problems.
  • Estimated Cost to Fix: $100-$6000+ depending on the issue.
  • Recalls: None Found

Suspension

• Air Suspension Compressor Failure
  • Description/Symptoms: The air suspension compressor may fail, leading to the car sitting lower than normal, uneven ride height, or a warning light on the dashboard.
  • Solution: Replace the air suspension compressor and inspect the air lines for leaks.
  • Estimated Cost to Fix: $1500 - $4000+
  • Recalls: None Found
• Air Suspension Strut Leaks
  • Description/Symptoms: Air leaks from the suspension struts can cause the vehicle to sag or become unstable, as well as cause the air compressor to overwork.
  • Solution: Replace the leaking air suspension struts.
  • Estimated Cost to Fix: $2000 - $5000+ per strut.
  • Recalls: None Found

Electrical

• Infotainment System Issues
  • Description/Symptoms: The infotainment system can experience glitches, frozen screens, or complete failure.
  • Solution: Software updates or replacement of the head unit may be necessary.
  • Estimated Cost to Fix: $500 - $5000+ depending on the issue.
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: The battery may drain quickly, especially if the car is not driven regularly.
  • Solution: Identify and repair the source of the parasitic drain. This could be a faulty module or accessory.
  • Estimated Cost to Fix: $100 - $1000+
  • Recalls: None Found
• Sensor Malfunctions
  • Description/Symptoms: Various sensors throughout the vehicle can malfunction, leading to warning lights and potential performance issues.
  • Solution: Diagnose and replace the faulty sensor.
  • Estimated Cost to Fix: $200 - $1000+ per sensor.
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Wood Trim Delamination/Cracking
  • Description/Symptoms: The wood trim can sometimes delaminate or crack due to age, temperature fluctuations, or humidity.
  • Solution: Refinishing or replacement of the affected wood trim pieces.
  • Estimated Cost to Fix: $500 - $5000+ depending on the extent of the damage and the specific trim piece.
  • Recalls: None Found
• Seat Motor Failures
  • Description/Symptoms: Power seat functions may stop working due to motor failure.
  • Solution: Replace the faulty seat motor.
  • Estimated Cost to Fix: $300 - $1500+ per motor.
  • Recalls: None Found

Summary

The 2015 Bentley Mulsanne, while a pinnacle of luxury, can present owners with a range of potential issues. Engine and suspension problems are among the most significant in terms of cost and potential impact on the vehicle’s reliability. Electrical gremlins can also be frustrating. Due to the vehicle’s complexity and the cost of parts and labor, repairs can be expensive, highlighting the importance of careful inspection and maintenance.