AI Damage2021 Mercedes-Benz AMG G63: common problems
Owners of the 2021 Mercedes-Benz AMG G63 filed 2 complaints with NHTSA, most often about electrical system and engine. The maker issued 154 service bulletins for this year. Details by component below, with sources.
Key figures
- Owner complaints
- 2
- Technical service bulletins (TSB)
- 154
What fails most often
- 1 Electrical system 50% of all complaints
- 2 Engine 50% of all complaints
- 3 Lane departure 50% of all complaints
- Electrical system: 1 complaints (50% of all); manufacturer bulletins for this component: 55.
- Engine: 1 complaints (50% of all); manufacturer bulletins for this component: 24.
- Lane departure: 1 complaints (50% of all); manufacturer bulletins for this component: 1.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 4 L · petrol · turbo · 8 cyl
- automatic, 9-speed
Drive: 4WD
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 1 | 0 | 55 |
| Engine | 1 | 0 | 24 |
| Lane departure | 1 | 0 | 1 |
| Powertrain | 0 | 0 | 23 |
| Structure | 0 | 0 | 14 |
| Service brakes | 0 | 0 | 12 |
| Steering | 0 | 0 | 9 |
| Backover prevention | 0 | 0 | 7 |
| Engine and cooling | 0 | 0 | 7 |
| Exterior lighting | 0 | 0 | 7 |
| Forward collision avoidance | 0 | 0 | 5 |
| Visibility | 0 | 0 | 5 |
| Fuel/propulsion system | 0 | 0 | 4 |
| Equipment | 0 | 0 | 3 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
Kept going in for repairs for the same concerns - nothing was found â- now its a recall on the 2022 model for the same issue that my 2021 model has â- Malfunction in the front/ rear differential lock system malfunction.
The lane keeping assistance is WAY to sensitive. Several times at just the slightest move towards the shoulder the car will brake and swerve. Its very alarming and needs to be recalibrated.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 19,885 of 36,659 model years in the NHTSA data (among the 46% least complained about).
On average one model year of the AMG G63 has 2 complaints (11 years in the data). This year has 2, above average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Lane departure. Windshield camera: calibration after windshield replacement.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Complaint Clanking noise from the area of the speakers in the doors
Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and…
- Complaint Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE
Although the symptom is similar to a tire or wheel vibration, it is usually readily noticeable that it is distinctly different if it happens at all times or only while braking. Cause Although the cause of the vibration…
- Complaint Only vehicles with a variable transfer case are affected
This can be identified through control unit N45 or N15/7 in the quick test. When accelerating with light load, vibrations or jolting sensation may come from the drivetrain. It may be mistaken for a harsh shift. Cause…
- Complaint Noises/ squealing from the service brake in various driving situations and ambient conditions
Cause Frictional vibrations Remedy The intent of this document is to reduce noise from high performance AMG brakes. AMG brakes are designed for performance under high load and in certain scenarios, can emit noise. Some…
- Complaint Consistently reproducible erroneous parktronic warnings from front with every key cycle
Cause The parking sensors are detecting the front brush guard. Remedy Complaint must be consistently reproducible and can occur multiple times a key cycle without obvious cause. NOTE: The parking system serves solely…
- Complaint Oil leaks found on M176 or M177 engines diagnosed to be from the cylinder head cover area Cause…
Complaint Oil leaks found on M176 or M177 engines diagnosed to be from the cylinder head cover area Cause Unknown (under investigation) Remedy If oil leaks are found at left or right cylinder head cover area please…
- Complaint A popup is seen on the HU with the message "data connection temporarily not available"
Potentially affected functionalities in NTG4.5, NTG5 1.Weather 2.Local Search 3.IP Radio 4.Send2Car 5.Speech Detection Service 6.Navigation 7.iHeartRadio 8.Traffic Cams Cause MB Apps is sundowned for all vehicles with…
- Complaint 1
General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics. Cause Various root…
- Complaint This document is intended as a pre-case diagnostic reference for transmission related concerns
It will also ensure that if a case is necessary, all supporting documentation is available. This should not be used on its own as justification for creating a TIPS case. Cause The root cause will vary depending on the…
- Complaint Customer reports Check Engine Light with possible loss of power concern
The Following DTC's are present • P210185 - The throttle valve actuator has a malfunction. There is a signal above the permissible limit value. • P213500 - The values from the position sensors of the throttle valve are…
- Complaint Mercedes-Benz USA is currently experiencing limited availability of transmission fluid…
Complaint Mercedes-Benz USA is currently experiencing limited availability of transmission fluid specification ATF 236.17 due to a global supply constraint. 236.17 ATF 1L and 5L (PNs: A002989060312 and A002989060313)…
- This NCU replaces the prior NCU issued on May 15, 2025, and contains additional MY 2023 and MY 2024…
This NCU replaces the prior NCU issued on May 15, 2025, and contains additional MY 2023 and MY 2024 vehicles which are highlighted below. In our continuing efforts to ensure the proper performance of Mercedes-Benz…
NHTSA lists 154 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2021 Mercedes-Benz AMG G63?
Owner complaints to NHTSA most often mention: electrical system, engine, lane departure. Total complaints: 2. The most frequent symptoms in complaint texts: driver assists: adaptive cruise, lane keeping (50%).
How many service bulletins (TSB) were issued for the 2021 Mercedes-Benz AMG G63?
NHTSA lists 154 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2021 Mercedes-Benz AMG G63 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2021 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-06.