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2018 BMW 750i

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By Research the Car 5 min read

The 2018 BMW 750i represents a blend of luxury, performance, and technology. The 750i features a 4.4-liter TwinPower Turbo V8 engine, producing 445 horsepower and 480 lb-ft of torque, coupled with an 8-speed automatic transmission. Other engine options available for the 2018 7 Series include a 3.0-liter inline-6 turbo (740i), a 6.6-liter V12 turbo (M760i), and a plug-in hybrid (740e). Owners generally praise the 750i for its comfortable ride, powerful engine, advanced technology, and luxurious interior. Some common complaints include the high cost of maintenance and repairs, complex electronics that can be prone to issues, and the depreciation rate of luxury vehicles.

Engine

4.4L TwinPower Turbo V8

  • Oil Leaks
    • Description/Symptoms: Oil leaks often occur from the valve cover gaskets or the oil filter housing gasket. Signs include visible oil drips under the car, burning oil smell, and low oil level warnings.
    • Solution: Replacement of the faulty gaskets.
    • Estimated Cost to Fix: $500 - $1500+ (depending on location and labor)
    • Recalls: None Found
  • Turbocharger Issues
    • Description/Symptoms: The turbochargers can experience failures, leading to a loss of power, unusual noises (whining or screeching), and potentially engine damage.
    • Solution: Replacement or repair of the turbocharger(s).
    • Estimated Cost to Fix: $3000 - $6000+ (depending on location and if one or both need replacing)
    • Recalls: None Found
  • Coolant Leaks
    • Description/Symptoms: Coolant leaks can occur from various locations, including the coolant expansion tank, hoses, or water pump. Symptoms include low coolant level warnings, overheating, and visible coolant leaks.
    • Solution: Locate and repair the leak, often involving replacing hoses, the expansion tank, or the water pump.
    • Estimated Cost to Fix: $200 - $1000+ (depending on the location and component)
    • Recalls: None Found

Transmission

8-Speed Automatic

  • Rough Shifting/Hesitation
    • Description/Symptoms: Some owners report experiencing rough or delayed shifts, particularly when the transmission is cold. This can manifest as a noticeable jerk or hesitation during acceleration or deceleration.
    • Solution: A software update of the transmission control module (TCM) may resolve the issue. In some cases, a transmission fluid flush or replacement of the mechatronic unit may be required.
    • Estimated Cost to Fix: $200 - $300 for a software update, $300 - $600 for a fluid flush, $2000 - $4000+ for mechatronic unit replacement
    • Recalls: None Found
  • Transmission Slippage
    • Description/Symptoms: Experiencing intermittent gear slipping during acceleration or deceleration.
    • Solution: Replacement of the transmission.
    • Estimated Cost to Fix: $5000 - $9000
    • Recalls: None Found

Suspension

  • Air Suspension Issues
    • Description/Symptoms: The air suspension system can develop leaks in the air springs or failures in the air compressor. This results in a sagging suspension, uneven ride height, and error messages on the dashboard.
    • Solution: Replacement of the faulty air springs or air compressor.
    • Estimated Cost to Fix: $800 - $2000+ per air spring, $1000 - $2500+ for the air compressor
    • Recalls: None Found
  • Adaptive Damper Malfunctions
    • Description/Symptoms: Issues with the adaptive dampers (electronically controlled shocks) can lead to a harsh or uncomfortable ride, as well as error messages related to the suspension system.
    • Solution: Replacement of the faulty adaptive dampers.
    • Estimated Cost to Fix: $1000 - $3000+ per damper
    • Recalls: None Found

Electrical

  • iDrive System Malfunctions
    • Description/Symptoms: The iDrive infotainment system can experience a range of issues, including freezing, crashing, unresponsive screens, and problems with Bluetooth connectivity.
    • Solution: A software update may resolve some issues. In more severe cases, the iDrive unit may need to be replaced.
    • Estimated Cost to Fix: $100 - $300 for a software update, $1000 - $3000+ for iDrive unit replacement
    • Recalls: None Found
  • Sensor Failures
    • Description/Symptoms: Various sensors throughout the vehicle (e.g., parking sensors, driver-assistance sensors) can fail, leading to error messages and malfunctioning systems.
    • Solution: Diagnosis and replacement of the faulty sensor(s).
    • Estimated Cost to Fix: $200 - $1000+ per sensor (depending on type and location)
    • Recalls: None Found
  • Battery Drain
    • Description/Symptoms: Excessive battery drain, even when the vehicle is turned off, can lead to difficulty starting the car. This is often caused by a faulty module or electrical component that is not shutting down properly.
    • Solution: Diagnosis and repair of the parasitic drain, which may involve replacing a module or component.
    • Estimated Cost to Fix: $200 - $1000+ (depending on the source of the drain)
    • Recalls: None Found

Exterior

  • Tail Light Issues
    • Description/Symptoms: LED tail lights can fail, resulting in dim or non-functional lights.
    • Solution: Replacement of the affected tail light assembly.
    • Estimated Cost to Fix: $500 - $1500+ per tail light
    • Recalls: None Found
  • Door Handle Issues
    • Description/Symptoms: The electronic door handles can sometimes malfunction, causing difficulty opening or closing the doors.
    • Solution: Replacement of the faulty door handle mechanism.
    • Estimated Cost to Fix: $500 - $1500+ per door handle
    • Recalls: None Found

Interior

  • Seat Motor/Adjustment Issues
    • Description/Symptoms: The electric seat motors and adjustment mechanisms can fail, leading to difficulty adjusting the seat position.
    • Solution: Replacement of the faulty motor or mechanism.
    • Estimated Cost to Fix: $300 - $1000+ per seat
    • Recalls: None Found
  • Sunroof Problems
    • Description/Symptoms: The sunroof may become stuck, leak, or make excessive noise during operation.
    • Solution: Repair or replacement of the sunroof motor, seals, or mechanism.
    • Estimated Cost to Fix: $300 - $1500+
    • Recalls: None Found

Summary

The 2018 BMW 750i, while a luxurious and powerful vehicle, is prone to certain issues, particularly with its engine, transmission, suspension, and electrical systems. The severity and cost of these issues can range from relatively minor and inexpensive fixes (such as a software update) to major and costly repairs (such as turbocharger replacement or transmission failure). Owners should be aware of these potential problems and factor them into the overall cost of ownership. Regular maintenance and prompt attention to any warning signs can help mitigate the risk of major breakdowns.

BMW, 750i
BMW 750i 2018
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