2012 BMW 740Li

Introduction:

The 2012 BMW 740Li is a full-size luxury sedan powered by a 3.0L N55B30 inline-6 engine paired with an 8-speed automatic transmission. It generates 315 horsepower and 330 lb-ft of torque. The 740Li is highly regarded for its luxurious interior, advanced technology features, and responsive handling. However, it has not been immune to problems reported by owners.

Engine

3.0L N55B30

• High-Pressure Fuel Pump Failure:
  • Description/Symptoms: Engine stalling, rough idling, reduced power
  • Solution: Replace the high-pressure fuel pump
  • Estimated Cost to Fix: $1,500 - $2,500
  • Recalls: None Found
• Water Pump Failure:
  • Description/Symptoms: Coolant leaks, overheating
  • Solution: Replace the water pump
  • Estimated Cost to Fix: $800 - $1,200
  • Recalls: None Found
• Valve Cover Gasket Leak:
  • Description/Symptoms: Oil leaks from the valve cover
  • Solution: Replace the valve cover gasket
  • Estimated Cost to Fix: $500 - $1,000
  • Recalls: None Found

Transmission

8-Speed Automatic:

• Mechatronic Unit Failure:
  • Description/Symptoms: Hesitant or jerky shifting, loss of gears
  • Solution: Replace the mechatronic unit
  • Estimated Cost to Fix: $3,000 - $5,000
  • Recalls: None Found
• Transmission Gearbox Malfunction:
  • Description/Symptoms: Transmission warning light illumination, shifting issues
  • Solution: Repair or replace the transmission gearbox
  • Estimated Cost to Fix: $2,000 - $4,000
  • Recalls: None Found

Suspension

• Air Suspension Failure:
  • Description/Symptoms: Suspension system warning light illumination, uneven ride height
  • Solution: Replace the air suspension compressor or other components
  • Estimated Cost to Fix: $1,500 - $3,000
  • Recalls: None Found
• Strut Mount Bearing Failure:
  • Description/Symptoms: Noise while turning or over bumps
  • Solution: Replace the strut mount bearings
  • Estimated Cost to Fix: $500 - $1,000
  • Recalls: None Found

Electrical

• Battery Drain:
  • Description/Symptoms: Weak battery, frequent jump-starting required
  • Solution: Diagnose and repair the source of the battery drain (e.g., parasitic power draw)
  • Estimated Cost to Fix: $500 - $1,500
  • Recalls: None Found
• Electrical Control Unit Malfunction:
  • Description/Symptoms: Various electrical system malfunctions (e.g., lighting, gauges)
  • Solution: Replace the faulty electrical control unit
  • Estimated Cost to Fix: $1,000 - $2,000
  • Recalls: None Found

Exterior

• Headlight Condensation:
  • Description/Symptoms: Moisture accumulation inside the headlights
  • Solution: Replace the headlight lenses or other components
  • Estimated Cost to Fix: $300 - $600
  • Recalls: None Found
• Door Lock Failure:
  • Description/Symptoms: Inoperable door locks
  • Solution: Repair or replace the door lock actuator
  • Estimated Cost to Fix: $500 - $1,000
  • Recalls: NHTSA Campaign Number: 20V-210

Interior

• Passenger Seat Occupancy Sensor Malfunction:
  • Description/Symptoms: Seatbelt warning light illumination even when the seat is occupied
  • Solution: Replace the passenger seat occupancy sensor
  • Estimated Cost to Fix: $500 - $1,000
  • Recalls: NHTSA Campaign Number: 20V-221
• Rearview Camera Failure:
  • Description/Symptoms: Rearview camera image becomes blurry or distorted
  • Solution: Replace the rearview camera
  • Estimated Cost to Fix: $500 - $1,000
  • Recalls: None Found
• Panoramic Sunroof Malfunction:
  • Description/Symptoms: Roof fails to open or close, leaks
  • Solution: Repair or replace the sunroof motor or other components
  • Estimated Cost to Fix: $1,500 - $3,000
  • Recalls: None Found

Summary:

The 2012 BMW 740Li is prone to a range of issues, particularly in its engine, transmission, and electrical systems. While many of these issues are relatively minor and inexpensive to fix, some, such as mechatronic unit failure and panoramic sunroof malfunction, can be costly to repair. These problems can impact the vehicle’s performance, reliability, and overall enjoyment for owners. It is recommended that potential buyers consider the potential repair costs and reliability concerns associated with the 740Li before purchasing.