2021 BMW M5

The 2021 BMW M5 is a high-performance sedan lauded for its blend of luxury and blistering speed. It features a 4.4-liter twin-turbocharged V8 engine producing 600 horsepower and 553 lb-ft of torque in the base model, and 617 horsepower in the Competition trim. Power is delivered through an 8-speed M Steptronic automatic transmission. Owners generally praise the M5 for its exceptional handling, powerful engine, luxurious interior, and comfortable ride, while some criticisms include the high price tag, running costs and the complex infotainment system.

Engine

4.4L Twin-Turbo V8 (S63)

• Oil Leaks
  • Description/Symptoms: Oil leaks can occur from various locations, including the valve cover gaskets, oil pan gasket, and turbocharger oil lines. Symptoms include visible oil leaks, burning oil smell, and low oil levels.
  • Solution: Replacing the affected gaskets or lines. Thorough cleaning of affected areas is also recommended.
  • Estimated Cost to Fix: $200 - $2000+ (depending on the location and severity of the leak).
  • Recalls: None Found
• Coolant Leaks
  • Description/Symptoms: Coolant leaks from hoses, expansion tank, or radiator. This can cause overheating or low coolant level warnings.
  • Solution: Replacing leaking components such as hoses, expansion tanks, or the radiator.
  • Estimated Cost to Fix: $100 - $1000+ (depending on the component).
  • Recalls: None Found

Transmission

8-Speed M Steptronic Automatic

• Rough Shifting
  • Description/Symptoms: Jerky or harsh shifts, especially during low-speed operation. This can be more noticeable in early production units.
  • Solution: Software updates (reprogramming the transmission control unit - TCU) may resolve some issues. In more severe cases, valve body replacement or transmission rebuild may be necessary.
  • Estimated Cost to Fix: $150 (software update) - $5,000+ (rebuild).
  • Recalls: None Found
• Delayed Engagement
  • Description/Symptoms: A noticeable delay between selecting a gear (especially from Park to Drive or Reverse) and the transmission engaging.
  • Solution: Checking the transmission fluid level and condition is the first step. If the fluid is low or contaminated, a fluid flush and fill may help. If the problem persists, a valve body issue is suspected which may require replacement.
  • Estimated Cost to Fix: $100 (fluid flush) - $3,000+ (valve body).
  • Recalls: None Found

Suspension

• Adaptive Damper Malfunctions
  • Description/Symptoms: The adaptive dampers, which adjust damping based on driving conditions, can sometimes malfunction. This can result in a stiff or bouncy ride, or warning lights on the dashboard.
  • Solution: Diagnosing the faulty damper and replacing it.
  • Estimated Cost to Fix: $500 - $1500+ per damper.
  • Recalls: None Found

Electrical

• Infotainment System Glitches
  • Description/Symptoms: The iDrive infotainment system can experience occasional glitches, such as freezing, lagging, or unexpected reboots.
  • Solution: Software updates often resolve these issues. In rare cases, the iDrive control unit may need to be replaced.
  • Estimated Cost to Fix: $0 (software update) - $1500+ (iDrive unit replacement).
  • Recalls: None Found
• Sensor Failures (Parking Sensors, etc.)
  • Description/Symptoms: Failure of parking sensors, blind spot monitoring sensors, or other driver-assistance sensors. This results in warning lights and the affected system not functioning correctly.
  • Solution: Diagnosing and replacing the faulty sensor.
  • Estimated Cost to Fix: $200 - $800+ per sensor.
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Creaking/Rattling Noises
  • Description/Symptoms: Creaking or rattling noises from the dashboard, door panels, or rear deck. These are often exacerbated by temperature changes or uneven road surfaces.
  • Solution: Tightening fasteners, adding sound-deadening material, or replacing worn clips and retainers. Pinpointing the exact location is key.
  • Estimated Cost to Fix: $100 - $500+ (depending on the severity and location).
  • Recalls: None Found

Summary:

The 2021 BMW M5 is a powerful and luxurious vehicle, but it can experience some issues. Oil leaks and coolant leaks are the most concerning engine issues. The transmission may suffer from rough shifting or delayed engagement, which can sometimes be fixed with a software update or require expensive repairs. Some owners have reported issues with the suspension and electrical systems. While the M5’s price point and complexity make repairs costly, keeping up with routine maintenance and addressing issues promptly can help mitigate potential problems. While the severity of these issues varies, prospective buyers should be aware of these potential problems and thoroughly inspect any vehicle before purchasing.