2021 Mercedes-Benz AMG GT 63 S

The 2021 Mercedes-Benz AMG GT 63 S is a high-performance luxury sedan known for its blistering speed and striking design. Its standard engine is a handcrafted 4.0-liter twin-turbocharged V8 engine producing 630 horsepower and 664 lb-ft of torque. While universally praised for its power and luxurious interior, some owners have reported experiencing specific issues. Common praises include the car’s breathtaking acceleration and opulent interior, while complaints often revolve around its high price point and potential maintenance costs. Other available engines include the AMG GT 43 3.0L inline-6 turbo with EQ Boost, the AMG GT 53 3.0L inline-6 turbo with EQ Boost, and the AMG GT 63 4.0L V8 Biturbo. The AMG GT 63 S has the AMG SPEEDSHIFT MCT 9-speed transmission.

Engine

4.0L Twin-Turbocharged V8

• Oil Leaks
  • Description/Symptoms: Oil leaks are sometimes reported from various engine seals and gaskets, including the valve cover gaskets and rear main seal. Symptoms include visible oil drips under the car and the smell of burning oil.
  • Solution: Replacing the leaking seals or gaskets.
  • Estimated Cost to Fix: $200 - $1,500+ depending on the location and severity of the leak and shop labor costs.
  • Recalls: None Found
• Turbocharger Issues
  • Description/Symptoms: Some owners have reported premature turbocharger failure or issues such as boost leaks. Symptoms can include reduced power, unusual noises from the engine, and the check engine light illuminating.
  • Solution: Turbocharger inspection, repair, or replacement.
  • Estimated Cost to Fix: $2,500 - $5,000+ depending on the specific issue and replacement costs.
  • Recalls: None Found

Transmission

AMG SPEEDSHIFT MCT 9-Speed

• Rough Shifting/Hesitation
  • Description/Symptoms: Some owners report experiencing rough or jerky shifting, particularly at lower speeds, or hesitation when accelerating.
  • Solution: Software update or transmission fluid change. In more severe cases, valve body replacement may be necessary.
  • Estimated Cost to Fix: $150 (fluid change) - $2,500+ (valve body replacement).
  • Recalls: None Found

Suspension

• Air Suspension Malfunctions
  • Description/Symptoms: The AMG GT 63 S utilizes an air suspension system. Issues can arise, including air leaks, compressor failure, or ride height sensor malfunctions. Symptoms include the car sitting unevenly, a warning light on the dash, or a noisy compressor.
  • Solution: Diagnosis and repair/replacement of the faulty component (air strut, compressor, or sensor).
  • Estimated Cost to Fix: $800 - $3,000+ per corner (air strut replacement) or $500 - $1,500 (compressor replacement)
  • Recalls: None Found

Electrical

• Infotainment System Glitches
  • Description/Symptoms: The MBUX infotainment system, while advanced, can sometimes experience glitches, including freezing, lagging, or unexpected restarts.
  • Solution: Software updates are often released to address these issues. In some cases, a system reset or hardware replacement may be necessary.
  • Estimated Cost to Fix: Varies, software updates are usually free at the dealership. Hardware replacement could cost $500 - $2,000+.
  • Recalls: None Found
• Sensor Issues
  • Description/Symptoms: Multiple sensors can give false readings or stop working entirely, such as the parking sensors or blind spot monitoring sensors. Symptoms include parking sensors always triggering, and the blind spot monitoring sensor failing to recognize vehicles.
  • Solution: Replacement of the sensors.
  • Estimated Cost to Fix: $200 - $500+ per sensor depending on which sensor needs to be replaced.
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• No Issues Found

Summary

The 2021 Mercedes-Benz AMG GT 63 S is a performance-oriented vehicle that offers exhilarating driving dynamics and a luxurious interior. While generally reliable, potential owners should be aware of potential issues, particularly concerning the engine oil leaks, turbochargers, transmission, and air suspension. The severity and cost of repairs can vary significantly depending on the specific issue and the shop performing the work. Electrical glitches can be annoying but are often resolved with software updates. Overall, potential buyers should thoroughly inspect any used model and obtain a pre-purchase inspection from a qualified mechanic familiar with AMG vehicles.