AI Damage2021 Mercedes-Benz AMG GLA45 S: common problems
The maker issued 106 service bulletins for this year. Details by component below, with sources.
Key figures
- Technical service bulletins (TSB)
- 106
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 0 | 0 | 48 |
| Steering | 0 | 0 | 12 |
| Structure | 0 | 0 | 11 |
| Powertrain | 0 | 0 | 10 |
| Equipment | 0 | 0 | 9 |
| Engine and cooling | 0 | 0 | 7 |
| Exterior lighting | 0 | 0 | 6 |
| Engine | 0 | 0 | 5 |
| Visibility | 0 | 0 | 5 |
| Backover prevention | 0 | 0 | 4 |
| Service brakes | 0 | 0 | 4 |
| Fuel/propulsion system | 0 | 0 | 3 |
| Fuel system | 0 | 0 | 3 |
| Wheels | 0 | 0 | 2 |
Comparison
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Steering. Steering play, power assist, rack and tie rods after a wheel impact.
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
- 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 Customers may report one or more of the following
• Transmission malfunction message • Check engine light illuminated • Shifts into N • Concern disappears after ignition cycle When performing a quick test, the following fault code is stored in Y3/14 ‑ Transmission…
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end)
The noise is heard once in each instance when changing direction of travel. Note: Sound file in attachment Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the…
- Dear Mercedes-Benz Owner
On behalf of Mercedes-Benz USA, LLC (“MBUSA”), thank you for being a part of the Mercedes-Benz family. We hope that you are enjoying your vehicle. Here at MBUSA, we are committed to delivering an exceptional ownership…
- Complaint Headlamp, front fog lamp leaky or fogged
Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. If a pressure compensation diaphragm is fitted in…
- Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject…
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the control unit software for the engine electronics does not correspond to the current series production…
- 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 The intent of this document is to provide workshops with helpful technical reference language
• Commonly used acronyms in LI's and TIPS cases. • Control unit names, numbers, and how to identify. • Network/wiring architecture groups to baumuster quick reference. • Platform to baumuster quick reference. Cause…
- Complaint Noises from the rear axle differential, particularly when cornering slowly Cause Small quantity…
Complaint Noises from the rear axle differential, particularly when cornering slowly Cause Small quantity of water entering into oil of multiplate clutches at right and left Remedy Follow below steps to install vent…
- Complaint Customer states the AC either does not cool/has poor performance or heat is insufficient
Cause Many possible root causes Remedy *Note - This Li does not apply if there are other Li's that apply to your concern OR you have a fault and/or guided test that leads to a root cause. AC Diagnosis (General) Initial…
- Complaint Customer may complain of a CEL on in the instrument cluster, rough running, trouble starting,…
Complaint Customer may complain of a CEL on in the instrument cluster, rough running, trouble starting, issues with ECO stop/ start or a combination thereof. Cause One or more broken valve springs in the cylinder head…
NHTSA lists 106 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 GLA45 S?
There are no owner complaints in the NHTSA data for this year; the data comes from 106 manufacturer service bulletins.
How many service bulletins (TSB) were issued for the 2021 Mercedes-Benz AMG GLA45 S?
NHTSA lists 106 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 GLA45 S 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.