2015 BMW 750i xDrive

The 2015 BMW 750i xDrive is a luxury sedan offering a blend of performance and comfort. The 750i xDrive is equipped with a 4.4-liter TwinPower Turbo V8 engine producing 445 horsepower and 480 lb-ft of torque. Other engine options for the 2015 7 Series include a 3.0-liter inline-6 and a hybrid inline-6. All engine options are paired with an 8-speed automatic transmission. People generally appreciate the 750i xDrive for its powerful engine, comfortable ride, and luxurious interior. Common dislikes include the complex electronics that can be prone to failure, and the high cost of maintenance and repairs.

Engine

4.4L TwinPower Turbo V8 (N63TU)

• Oil Leaks (Valve Stem Seals)
  • Description/Symptoms: Oil leaks may occur due to degradation of the valve stem seals, leading to excessive oil consumption, blue smoke from the exhaust, and potential catalytic converter damage.
  • Solution: Replacing the valve stem seals.
  • Estimated Cost to Fix: $3,000 - $7,000+
  • Recalls: None Found
• Coolant Leaks (Coolant Transfer Pipe)
  • Description/Symptoms: Internal coolant leaks can develop within the engine, often originating from the coolant transfer pipe located in the “V” of the engine. Symptoms include coolant loss, overheating, and visible coolant leaks.
  • Solution: Replacement of the coolant transfer pipe, often requiring significant engine disassembly.
  • Estimated Cost to Fix: $2,500 - $5,000+
  • Recalls: None Found
• Turbocharger Issues
  • Description/Symptoms: Turbochargers may experience failures, resulting in reduced engine power, unusual noises (whining or screeching), and potential engine damage.
  • Solution: Turbocharger replacement.
  • Estimated Cost to Fix: $3,000 - $6,000+ (for both turbos)
  • Recalls: None Found

Transmission

8-Speed Automatic (ZF 8HP)

• Mechatronic Unit Failure
  • Description/Symptoms: The mechatronic unit, which controls the transmission’s shifting, can fail, leading to rough or delayed shifting, transmission slipping, and potential complete loss of drive.
  • Solution: Replacement or rebuild of the mechatronic unit.
  • Estimated Cost to Fix: $2,000 - $4,000+
  • Recalls: None Found
• Torque Converter Issues
  • Description/Symptoms: Humming or rattling noises, shuddering, transmission slipping.
  • Solution: Replace the Torque Converter
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found

Suspension

• Air Suspension Compressor Failure
  • Description/Symptoms: The air suspension compressor can fail, causing the vehicle to sag, ride height to be uneven, and a warning light to illuminate on the dashboard.
  • Solution: Replacement of the air suspension compressor.
  • Estimated Cost to Fix: $800 - $1,500+
  • Recalls: None Found
• Air Strut Leaks
  • Description/Symptoms: Leaks in the air struts can cause the vehicle to sag, ride height to be uneven, and a warning light to illuminate on the dashboard.
  • Solution: Replacement of the leaking air strut.
  • Estimated Cost to Fix: $1,000 - $2,000+ per strut
  • Recalls: None Found

Electrical

• iDrive System Malfunctions
  • Description/Symptoms: The iDrive system can experience glitches, freezes, and complete failures, affecting navigation, entertainment, and vehicle settings.
  • Solution: Software updates, component replacement (screen, controller, or control module).
  • Estimated Cost to Fix: $500 - $2,000+ depending on the issue.
  • Recalls: None Found
• Battery Drain Issues
  • Description/Symptoms: Excessive battery drain can occur, especially with the complex electronics in the vehicle, leading to starting problems and the need for frequent jump-starts.
  • Solution: Diagnosis and repair of the source of the battery drain, which may involve replacing a faulty module or repairing wiring issues.
  • Estimated Cost to Fix: $200 - $1,000+
  • Recalls: None Found

Exterior

• Adaptive Headlight Malfunctions
  • Description/Symptoms: The adaptive headlights can fail to adjust properly, causing poor visibility, error messages, and potential safety concerns.
  • Solution: Replacement of the headlight assembly or control module.
  • Estimated Cost to Fix: $1,500 - $3,000+ per headlight.
  • Recalls: None Found

Interior

• Seat Motor Failures
  • Description/Symptoms: The seat motors can fail, causing the seats to become stuck in a certain position or unable to adjust at all.
  • Solution: Replacement of the faulty seat motor.
  • Estimated Cost to Fix: $300 - $800+ per motor.
  • Recalls: None Found
• Sunroof Issues
  • Description/Symptoms: Sunroof malfunctions, including failures to open or close properly, excessive noise, or leaks.
  • Solution: Repair or replacement of the sunroof motor, tracks, or seals.
  • Estimated Cost to Fix: $500 - $1,500+
  • Recalls: None Found

Summary

The 2015 BMW 750i xDrive offers a luxurious driving experience but is prone to certain issues, particularly with the engine and electrical systems. The most significant concerns revolve around oil leaks (valve stem seals), coolant leaks (coolant transfer pipe), turbocharger problems with the 4.4L V8, mechatronic unit failures in the transmission, and air suspension malfunctions. These repairs can be costly, making thorough pre-purchase inspections and a comprehensive maintenance history essential. Electrical issues, particularly with the iDrive system, can also be frustrating and expensive to resolve. Prospective buyers should be aware of these potential issues and budget accordingly for maintenance and repairs.