Recall 21V860 covers 46 2021 Mercedes-Benz AMG GLB35 and Glb 250 SUVs with incorrect window air bag mounting. Free repair at a franchised Mercedes-Benz dealer.
Mercedes-Benz is recalling 46 2021 AMG GLB35 and Glb 250 vehicles because of an incorrect lower A-pillar mounting issue for the driver-side window air bag. In a crash, that air bag can fail to work as intended and increase injury risk; Mercedes-Benz dealers will complete the free repair.
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What's wrong?
The driver-side window airbag in the 2021 Mercedes-Benz AMG GLB35 and Glb 250 sits along the side window area and ties into the lower A-pillar, the front roof pillar beside the windshield. In a side impact or rollover, it inflates beside the glass to help keep an occupant's head and upper body inside the protected area.
On affected vehicles, a production process deviation left the driver-side window airbag incorrectly mounted in the lower A-pillar area. Mercedes-Benz found that this incorrect mounting changes how the airbag inflates. That deviation means the vehicle does not meet the ejection-mitigation requirements tied to NHTSA recall 21V860.
There is no warning sign before failure. An owner will not hear a noise, see a warning light, or feel a change in normal driving that confirms the airbag is mounted incorrectly.
Who's affected?
Both GLB versions use the same driver-side window air bag component listed in this recall.
| 2021 Mercedes-Benz AMG GLB35 | side air bag |
|---|---|
| 2021 Mercedes-Benz Glb 250 | side air bag |
| Units affected | 46 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific SUV is included.
What's the safety risk?
The driver-side window air bag can fail to function properly during a crash, increasing injury risk. There is no warning sign before the issue matters, so confirm your VIN and schedule the inspection soon. Repair is free at any franchised Mercedes-Benz dealer.
What should I do?
- Check your VIN to confirm your 2021 Mercedes-Benz AMG GLB35 or Glb 250 is included in this recall.
- Contact a franchised Mercedes-Benz dealer to schedule the free driver-side window air bag mounting inspection and repair.
- Bring the recall notice if Mercedes-Benz mailed one. If not, reference recall number 21V860 when you call.
- Ask the dealer to confirm the driver-side window air bag mounting was inspected and repaired before you leave.
What happens at the repair
At the dealer, a Mercedes-Benz technician inspects how the driver-side window air bag is mounted at the lower A-pillar and repairs the mounting if it is not installed correctly. The recall repair is free, with parts and labor covered. Out-of-pocket repairs already paid are handled through the existing new vehicle warranty, not through a separate reimbursement program, because the involved vehicles remain under warranty. Ask the service desk how warranty coverage applies if you have prior repair paperwork.
| Reimbursement | Warranty coverage applies |
|---|
Timeline
| November 5, 2021 | NHTSA published the recall |
|---|---|
| November 12, 2021 | Dealer notification began |
| December 21, 2021 | Owner notification mailed |
| January 4, 2022 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| January 4, 2022 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 21V860?
Recall 21V860 covers 46 2021 Mercedes-Benz AMG GLB35 and Glb 250 vehicles with a driver-side window air bag that was not mounted correctly at the lower A-pillar. The air bag can fail to function properly in a crash, increasing injury risk.
What should I do if my 2021 Mercedes-Benz AMG GLB35 or Glb 250 is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 21V860. If it is, contact a franchised Mercedes-Benz dealer to schedule the driver-side window air bag inspection and any needed repair. Reference recall 21V860 when you call.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost. Mercedes-Benz dealers will inspect the driver-side window air bag mounting and repair it as necessary free of charge.
What is the safety risk in recall 21V860?
The safety risk is reduced air bag protection in a crash. Mercedes-Benz says the driver-side window air bag can fail to function properly if the lower A-pillar mounting is incorrect, increasing the risk of injury. The dealer repair addresses that mounting problem.
What if I bought my Mercedes-Benz GLB used?
The free recall repair still applies. Federal recall law follows the vehicle, not the first owner. Check your VIN to confirm inclusion, then call a franchised Mercedes-Benz dealer or Mercedes-Benz customer service at 1-800-367-6372.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V860000 |
|---|---|
| Mercedes-Benz customer service | 1-800-367-6372 |
| NHTSA recall # | 21V860 |
| NHTSA recall # (full) | 21V860000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →