What is the 2016-2022 Mercedes-Benz AMG GT Active Transaxle Mount Connectivity Faults and Replacement?

The C190 AMG GT mounts its rear transaxle on three ACTIVE (electronically controlled) mounts that stiffen under hard cornering and soften at idle. The most common reported failure isn't rubber breakdown — it's wiring harness or connector corrosion at the mount sensors, which trip… Repairs typically run $400-$2,800. Severity: medium.

What is the 2016-2022 Mercedes-Benz AMG GT Emergency Call (eCall) Communication Module and SIM Card Failures — Automatic Crash Notification Does Not Transmit?

The AMG GT has been recalled repeatedly across its entire production run for defects in the telematics communication module that carries the emergency call function, and the campaigns stack across different root causes rather than repeating one. NHTSA 21V058000 covers 2016-2021 A… Severity: medium.

Mercedes-Benz · Known Issues

2021 Mercedes-Benz AMG GT Problems: 8 Known Issues

2021 model year · 210+ owner reports · Updated September 2026

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According to Au7o's analysis of 210+ owner reports, the 2021 Mercedes-Benz AMG GT has 8 documented known issues, with 6 rated critical. The most serious are Fuel Pump Impeller Deformation Causes Engine Shutdown and Failure to Restart, Misrouted Transmission Wiring Harness Connector Corrodes and Short-Circuits (Fire Risk, Recall Repeated After Failed First Remedy), 48-Volt EQ Boost System: Loose Ground Cable (Fire Recall) and 48V Battery / Starter-Generator Failure Causing No-Start ($900-$3,500 repair), Getrag 7DCL750 Rear Transaxle Dual-Clutch Failure — Clutch Pack Wear, Speed Sensor Faults and Weep-Hole Leaks ($5,000-$15,000 repair), Front Wheel Speed Sensor Wiring Harness Defect on AMG GT Black Series (ABS/ESP Signal Loss) and Starter Motor Positive Cable Misinstalled — Harness Chafe, Short Circuit, Stall and Fire Risk. The most commonly reported issue is Active Transaxle Mount Connectivity Faults and Replacement with 210 owner reports.

Frequently Asked Questions

What are the most common Mercedes-Benz AMG GT problems?

According to Au7o's analysis of 210+ owner reports, the 2021 Mercedes-Benz AMG GT has 8 documented issues. The most frequently reported are: Fuel Pump Impeller Deformation Causes Engine Shutdown and Failure to Restart, Misrouted Transmission Wiring Harness Connector Corrodes and Short-Circuits (Fire Risk, Recall Repeated After Failed First Remedy), 48-Volt EQ Boost System: Loose Ground Cable (Fire Recall) and 48V Battery / Starter-Generator Failure Causing No-Start. Of these, 6 are rated critical and should be addressed promptly.

Is the Mercedes-Benz AMG GT reliable?

The 2021 Mercedes-Benz AMG GT has 8 known issues documented across 210+ owner reports. 6 issues are rated critical: Fuel Pump Impeller Deformation Causes Engine Shutdown and Failure to Restart and Misrouted Transmission Wiring Harness Connector Corrodes and Short-Circuits (Fire Risk, Recall Repeated After Failed First Remedy) and 48-Volt EQ Boost System: Loose Ground Cable (Fire Recall) and 48V Battery / Starter-Generator Failure Causing No-Start and Getrag 7DCL750 Rear Transaxle Dual-Clutch Failure — Clutch Pack Wear, Speed Sensor Faults and Weep-Hole Leaks and Front Wheel Speed Sensor Wiring Harness Defect on AMG GT Black Series (ABS/ESP Signal Loss) and Starter Motor Positive Cable Misinstalled — Harness Chafe, Short Circuit, Stall and Fire Risk. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Mercedes-Benz AMG GT problems?

Repair costs for known Mercedes-Benz AMG GT issues range from $400 to $15,000, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2021-2024 Mercedes-Benz AMG GT Fuel Pump Impeller Deformation Causes Engine Shutdown and Failure to Restart?

The in-tank fuel pump fitted to a broad range of 2021-2024 Mercedes-Benz models including the AMG GT uses an impeller that did not meet material specification. The impeller swells or deforms in service, contacts the pump housing and binds. The mechanical resistance shuts the pump… Severity: high.

All 8 Known Issues

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Frequently Asked Questions

What are the most common Mercedes-Benz AMG GT problems?

Is the Mercedes-Benz AMG GT reliable?

How much does it cost to fix common Mercedes-Benz AMG GT problems?

What is the 2021-2024 Mercedes-Benz AMG GT Fuel Pump Impeller Deformation Causes Engine Shutdown and Failure to Restart?

2019-2025 Mercedes-Benz AMG GT: Misrouted Transmission Wiring Harness Connector Corrodes and Short-Circuits (Fire Risk, Recall Repeated After Failed First Remedy)#

2019-2025 Mercedes-Benz AMG GT: 48-Volt EQ Boost System: Loose Ground Cable (Fire Recall) and 48V Battery / Starter-Generator Failure Causing No-Start#

2019-2021 Mercedes-Benz AMG GT: Starter Motor Positive Cable Misinstalled — Harness Chafe, Short Circuit, Stall and Fire Risk#

2016-2021 Mercedes-Benz AMG GT: Getrag 7DCL750 Rear Transaxle Dual-Clutch Failure — Clutch Pack Wear, Speed Sensor Faults and Weep-Hole Leaks#

2016-2022 Mercedes-Benz AMG GT: Active Transaxle Mount Connectivity Faults and Replacement#

2021-2024 Mercedes-Benz AMG GT: Fuel Pump Impeller Deformation Causes Engine Shutdown and Failure to Restart#

2021 Mercedes-Benz AMG GT: Front Wheel Speed Sensor Wiring Harness Defect on AMG GT Black Series (ABS/ESP Signal Loss)#

2016-2022 Mercedes-Benz AMG GT: Emergency Call (eCall) Communication Module and SIM Card Failures — Automatic Crash Notification Does Not Transmit#

What is the 2019-2025 Mercedes-Benz AMG GT Misrouted Transmission Wiring Harness Connector Corrodes and Short-Circuits (Fire Risk, Recall Repeated After Failed First Remedy)?

What is the 2019-2025 Mercedes-Benz AMG GT 48-Volt EQ Boost System: Loose Ground Cable (Fire Recall) and 48V Battery / Starter-Generator Failure Causing No-Start?

What is the 2016-2021 Mercedes-Benz AMG GT Getrag 7DCL750 Rear Transaxle Dual-Clutch Failure — Clutch Pack Wear, Speed Sensor Faults and Weep-Hole Leaks?

What is the 2021 Mercedes-Benz AMG GT Front Wheel Speed Sensor Wiring Harness Defect on AMG GT Black Series (ABS/ESP Signal Loss)?

What is the 2019-2021 Mercedes-Benz AMG GT Starter Motor Positive Cable Misinstalled — Harness Chafe, Short Circuit, Stall and Fire Risk?

What is the 2016-2022 Mercedes-Benz AMG GT Active Transaxle Mount Connectivity Faults and Replacement?

What is the 2016-2022 Mercedes-Benz AMG GT Emergency Call (eCall) Communication Module and SIM Card Failures — Automatic Crash Notification Does Not Transmit?