2024 BMW M440i

The 2024 BMW M440i is a performance-oriented version of the 4 Series coupe, convertible, and Gran Coupe. It offers a blend of sporty driving dynamics and everyday usability. The primary engine option is a 3.0-liter turbocharged inline-6 engine producing 382 horsepower and 369 lb-ft of torque. This engine is paired with an 8-speed automatic transmission. While owners generally praise the M440i for its powerful engine, sharp handling, and luxurious interior, some have noted concerns regarding the iDrive infotainment system’s complexity, the run-flat tires’ harsh ride, and the availability of certain options. This compilation aims to provide a comprehensive overview of the reported issues, helping potential buyers make informed decisions.

Engine

3.0L Turbocharged Inline-6 (B58)

• Engine Hesitation/Stalling (Cold Start)
  • Description/Symptoms: Some owners have reported instances of engine hesitation or stalling shortly after starting the car, particularly in colder weather. This may be accompanied by a rough idle.
  • Solution: In some cases, a software update to the engine control unit (ECU) can address the issue. In other cases, replacing the Fuel Injectors has resolved the problem.
  • Estimated Cost to Fix: $300+ for software; $1,200+ for fuel injector replacement
  • Recalls: None Found

Transmission

8-Speed Automatic (ZF 8HP)

• Rough Shifting/Hesitation
  • Description/Symptoms: Some owners have experienced rough or jerky shifting, especially at lower speeds or during downshifts. There might also be a noticeable hesitation when accelerating.
  • Solution: Software reprogramming of the transmission control unit (TCU) has resolved the issue in some cases. In more severe cases, a transmission fluid flush and filter replacement or valve body replacement might be necessary.
  • Estimated Cost to Fix: $200+ for software; $500+ for fluid flush; $1,500+ for valve body replacement
  • Recalls: None Found

Suspension

• Adaptive M Suspension Malfunction
  • Description/Symptoms: The adaptive M suspension can sometimes exhibit issues, leading to a warning message on the dashboard. This can result in a noticeably stiffer or uncomfortable ride.
  • Solution: Diagnosis and potential replacement of a faulty suspension sensor or actuator may be required.
  • Estimated Cost to Fix: $500 - $1,500+
  • Recalls: None Found

Electrical

• iDrive Infotainment System Freezing/Lag
  • Description/Symptoms: The iDrive infotainment system can occasionally freeze, lag, or experience unexpected restarts.
  • Solution: A software update is usually the first step. If the issue persists, the iDrive control unit may need to be replaced.
  • Estimated Cost to Fix: $0 for software update; $1,000+ for control unit replacement.
  • Recalls: None Found
• Parking Sensor Malfunction
  • Description/Symptoms: The parking sensors might randomly trigger false alarms or fail to detect obstacles.
  • Solution: Check the sensors for physical damage or obstructions. If clear, the sensor might be faulty and require replacement.
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found

Exterior

• Automatic Trunk/Tailgate Issues
  • Description/Symptoms: The automatic trunk/tailgate can sometimes fail to open or close properly.
  • Solution: Check the hydraulic struts and the latch mechanism. A software reset may sometimes be needed or the struts may need to be replaced
  • Estimated Cost to Fix: $200 - $600+
  • Recalls: None Found

Interior

• Seat Adjustment Motor Failure
  • Description/Symptoms: The electric seat adjustment motors can sometimes fail, preventing the seat from moving in one or more directions.
  • Solution: Replacement of the faulty seat adjustment motor or the entire seat adjustment assembly.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Summary

The 2024 BMW M440i is generally a reliable car, but like any vehicle, it’s not without potential issues. Most reported problems revolve around the engine, transmission, and electrical systems, with software glitches being a recurring theme. Suspension issues and interior malfunctions are less common, but can still occur. While some fixes are relatively inexpensive (software updates), others, like replacing the transmission valve body or suspension components, can be more costly. It is recommended to keep up with scheduled maintenance to avoid issues and to diagnose problems early if they arise.