2017 BMW M4

The 2017 BMW M4 is a high-performance sports car lauded for its sharp handling, powerful engine, and stylish design. It’s powered by a 3.0-liter TwinPower Turbo inline-six engine producing 425 horsepower and 406 lb-ft of torque in its standard configuration. An optional Competition Package bumps the power up to 444 horsepower. Transmission choices include a 6-speed manual and a 7-speed M-DCT (Dual Clutch Transmission). Drivers appreciate the M4’s engaging driving experience and sporty aesthetics, but some common criticisms include a harsh ride, especially on rough roads, and potentially high maintenance costs associated with its performance-oriented components.

Engine

S55 3.0L Twin-Turbo Inline-Six

• Charge Air Cooler Leaks
  • Description/Symptoms: Coolant leaks from the charge air coolers, which are integrated into the intake manifold. Symptoms include low coolant levels, overheating, and potential engine damage if left unaddressed.
  • Solution: Replace the faulty charge air cooler. Improved designs are available.
  • Estimated Cost to Fix: $1500 - $3000+
  • Recalls: None Found
• Oil Leaks
  • Description/Symptoms: Oil leaks can occur from various areas, including the valve cover gasket, oil filter housing, and oil pan gasket. Symptoms include visible oil leaks, burning oil smell, and low oil levels.
  • Solution: Replace the leaking gaskets or seals.
  • Estimated Cost to Fix: $200 - $1500+ depending on location
• Crank Hub Failure (Preventative)
  • Description/Symptoms: While not always a guaranteed failure point, the S55 engine is known to have a weak crank hub design. High power output, especially with tunes, can cause the crank hub to slip, leading to timing issues and potentially catastrophic engine damage. This is more of a preventative measure.
  • Solution: Install a keyed crank hub or upgraded single-piece crank hub.
  • Estimated Cost to Fix: $1500 - $4000+
  • Recalls: None Found

Transmission

7-Speed M-DCT (Dual Clutch Transmission)

• Rough Shifting/Clunking
  • Description/Symptoms: Some owners have reported rough or jerky shifting, particularly at low speeds or during cold starts. Clunking noises can also be present during gear changes.
  • Solution: In some cases, a software update can improve shifting smoothness. In more severe cases, clutch replacement or DCT unit repair may be necessary.
  • Estimated Cost to Fix: $200 - $800 (Software), $3000 - $10000+ (Clutch/DCT Repair)
  • Recalls: None Found

6-Speed Manual Transmission

• No Issues Found

Suspension

• Adaptive Damper Malfunctions
  • Description/Symptoms: The M4’s optional adaptive M suspension can experience issues with the electronic dampers. Symptoms include error messages on the dashboard, a noticeably stiffer or softer ride on one side of the vehicle, and poor handling.
  • Solution: Diagnose the faulty damper and replace it.
  • Estimated Cost to Fix: $800 - $2000+ per damper
  • Recalls: None Found

Electrical

• iDrive System Issues
  • Description/Symptoms: The iDrive infotainment system can experience occasional glitches, including screen freezes, slow response times, and Bluetooth connectivity problems.
  • Solution: Try a system reboot. Software updates from BMW can sometimes resolve these issues. In rare cases, the iDrive control unit may need replacement.
  • Estimated Cost to Fix: $0 (Reboot) - $1500+ (Control Unit Replacement)
  • Recalls: None Found
• LED Lighting Problems
  • Description/Symptoms: LED headlights or taillights can experience premature failure or flickering.
  • Solution: Replace the faulty LED unit.
  • Estimated Cost to Fix: $500 - $2000+ depending on the light and location.
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Dashboard Rattle
  • Description/Symptoms: Rattling noises emanating from the dashboard, often near the center console or windshield.
  • Solution: Locating and securing the source of the rattle, which may involve adding felt pads or tightening loose components.
  • Estimated Cost to Fix: $100 - $500+

Summary

The 2017 BMW M4, while a thrilling performance machine, has some common issues that prospective buyers should be aware of. Engine issues, particularly those related to oil leaks and charge air cooler, can be costly to repair. The M-DCT transmission can also present problems, although software updates sometimes offer a resolution. Suspension and electrical issues can add to the overall maintenance burden. Addressing these potential problems proactively can help ensure a more enjoyable ownership experience. Overall severity ranges from minor inconveniences like iDrive glitches to major repairs such as engine component failures, with associated costs varying widely from a few hundred to several thousand dollars.