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NHTSA campaign 21V527000 · Manufacturer campaign 2021070032/33

Mercedes Benz Recall 21V-527: Side Impact Crash Sensor Connectors May Loosen

NHTSA recall 21V527000 (Manufacturer campaign 2021070032/33) was reported by Mercedes-Benz USA, LLC on July 12, 2021, with 542 vehicles potentially affected (per NHTSA). NHTSA's record lists the Mercedes Benz AMG G63, Mercedes Benz GLC 300, Mercedes Benz AMG CLS53 and more for model years 2020–2021. Owners were notified on September 3, 2021, per NHTSA.

Updated daily from NHTSA's recall files

Is my vehicle included?

This page lists, by model year, the vehicles NHTSA's recall record names for campaign 21V527000 in the model years try.vin imports (1995 and later); NHTSA's own record can list more. A model year on the list doesn't mean every vehicle of that year is included, and some may already have been repaired.

To see whether a specific vehicle is included and still needs the repair, enter its VIN at nhtsa.gov/recalls.

Mercedes Benz VIN check: decode a VIN to see its year, make and model.

Key facts

NHTSA campaign
21V527000 (also written 21V-527 or 21V527)
Filed by
Mercedes-Benz USA, LLC
Manufacturer campaign number
2021070032/33
Report received
Potentially affected
542 vehicles (per NHTSA)
Component
Air Bags — Sensor — Side Impact
Owners notified

Repair completion: 94.65% (latest rate the manufacturer reported to NHTSA; dataset updated October 21, 2026)

NHTSA cautions against comparing completion rates across recalls or manufacturers. How try.vin reads them.

Vehicles listed for this recall

NHTSA's recall record lists these vehicles for recall 21V527000. try.vin imports model years 1995 and later, so NHTSA's own list can be longer. Model years with a try.vin recall page link to it. Build dates are NHTSA's range for a model year (per NHTSA); a vehicle built in that range is not necessarily included.

Mercedes Benz

  • Mercedes Benz AMG CLS53

  • Mercedes Benz AMG E53

  • Mercedes Benz AMG G63

  • Mercedes Benz AMG GLC63

  • Mercedes Benz AMG GT43

  • Mercedes Benz AMG GT53

  • Mercedes Benz CLS 450

  • Mercedes Benz E 350

  • Mercedes Benz E 450

  • Mercedes Benz G 550

  • Mercedes Benz GLC 300

  • Mercedes Benz S 450

  • Mercedes Benz S 560

All Mercedes Benz recalls

NHTSA's recall notice

As NHTSA's recall record states it for campaign 21V527000.

Defect description

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 CLS450, AMG E53, AMG CLS53, E350, E450, AMG GT43, AMG GT53, 2020 S450, S560, G550, AMG GLC63, 2020-2021 GLC300, and AMG G63 vehicles. The side crash sensor connectors may come loose, which could delay the activation of air bags and seatbelts during a side impact crash.

Safety consequence

Air bags and seatbelts that don't function as intended can increase the risk of injury during a crash.

Manufacturer remedy

Dealers will inspect and replace as necessary, the side impact crash sensors, free of charge. Owner notification letters were mailed on September 3, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021070032/33.

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Sources

Official NHTSA notice for recall 21V527000

Campaign details come from NHTSA's recall files, which try.vin imports once a day. The plain-language subject and the completion rate come from the U.S. Department of Transportation's Recalls Data dataset. How try.vin reads recall data.