Home › Mazda › MAZDA3 › 20V346000

Mazda3 and CX-30 front brake parts may loosen

NHTSA campaign 20V346000 · Reported 2020-06-12 · Mazda North American Operations

high How serious is it? About this label

Serious — weakened braking or a caliper interfering with a wheel can cause a crash, so while Mazda has not told owners to park the car, this should be handled without delay.

What's wrong, in plain English

On these 2020 Mazda3 and CX-30 cars, the bolts that hold the front brake calipers may not have been tightened enough at the factory. The caliper is the part that squeezes the brake pads against the wheel to slow the car down. If it loosens, the brakes may not stop the car as well as they should, or the loose part can rub against the spinning wheel and upset how the car handles. Dealers check and tighten the bolts, or replace the caliper, free.

What you should do

1. Look up your VIN at nhtsa.gov/recalls to confirm your car is affected.
2. Call your Mazda dealer, or Mazda customer service at 1-800-222-5500 (Option 4), and reference recall 4420F.
3. Have the front brake caliper bolts inspected and tightened, or the caliper replaced — at no charge.

Affected vehicles (2)

2020 Mazda CX-30
2020 Mazda MAZDA3

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: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
Summary: Mazda North American Operations (Mazda) is recalling certain 2020 CX-30 and Mazda3 vehicles. The front brake caliper mounting bolts may not have been tightened properly during assembly, possibly allowing the calipers to loosen.
Safety risk: Loose brake calipers can reduce braking performance or interfere with wheel rotation, affecting vehicle handling. Either of these scenarios can increase the risk of a crash.
Remedy: Mazda will notify owners, and dealers will inspect the front brake caliper bolts, tightening them as necessary. If bolts are missing, the affected brake caliper will be replaced. Repairs will be performed free of charge. The recall began July 24, 2020. Owners may contact Mazda customer service at 1-800-222-5500, Option 4. Mazda's number for this recall is 4420F.

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