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Mazda3 automatic braking can stop car unexpectedly

NHTSA campaign 19V907000 · Reported 2019-12-19 · Mazda North American Operations

high How serious is it? About this label

Stopping the vehicle unexpectedly increases the risk of a crash. The notice does not tell owners to stop driving.

What's wrong, in plain English

This Mazda3 has an automatic emergency braking system that watches the road ahead and stops the car if it senses something in the way. On these vehicles it can be fooled — it may detect an obstacle that isn't really there and apply the brakes on its own, bringing the car to a sudden stop in traffic. The fix is new software for the braking system, plus a dashboard display update or replacement and a new owner's manual on some cars.

What you should do

1. Check your VIN at nhtsa.gov/recalls to see if your car is covered.
2. Contact your Mazda dealer or Mazda customer service at 1-800-222-5500, Option 4 (recall 4219L).
3. Have the brake system software updated — all of this work is free.

Affected vehicles (2)

Who to contact

Mazda — official Mazda recall lookup

Customer service: 1-800-222-5500

Any franchised dealer for the brand can do the repair. Phone numbers are taken from manufacturer sites and recent NHTSA notices; if one has changed, the number in your own recall letter is the one to use.

Official notice

Component
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
Summary
Mazda North American Operations (Mazda) is recalling certain 2019-2020 Mazda3 vehicles. The Smart Brake System (SBS) can falsely detect an obstacle while driving, activating the automatic emergency braking system and suddenly stopping the vehicle.
Safety risk
Stopping the vehicle unexpectedly increases the risk of a crash.
Remedy
Mazda will notify owners, and dealers will update the SBS software. In addition, vehicles with certain production dates will receive an instrument cluster software update or replacement and a replacement owner's manual. These repairs will be performed free of charge. The recall began February 14, 2020. Owners may contact Mazda customer service at 1-800-222-5500, Option 4. Mazda's number for this recall is 4219L.

Verify your specific vehicle by VIN at nhtsa.gov. Recall repairs are free of charge by law.