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Mazda CX-30/Mazda3 Front Brake Caliper Bolts Loose

NHTSA campaign 20V346000 · Reported Jun 12, 2020 · Mazda North American Operations

high How serious is it? About this label

Loose brake calipers can reduce braking performance or affect wheel rotation and handling, increasing the risk of a crash. The notice does not tell owners to stop driving.

Key facts

NHTSA campaign number	20V346000
Reported to NHTSA	Jun 12, 2020
Manufacturer	Mazda North American Operations
Part affected	Service Brakes, Hydraulic:foundation Components:disc:caliper
Vehicles covered	2 model/year combinations, model years 2020
Do-not-drive advisory	No
Park-outside advisory	No
Repair	Free at any franchised dealer

What's wrong, in plain English

On certain Mazda CX-30 and Mazda3 vehicles, the bolts that hold the front brake calipers in place may not have been tightened properly when the vehicle was built. Over time, this can let the calipers become loose. Loose calipers can reduce how well the brakes work or interfere with the wheels turning properly, which affects how the vehicle handles. Either of these problems can increase the risk of a crash.

What you should do

1. Check your VIN at nhtsa.gov/recalls.
2. Contact a Mazda dealer; you can also call Mazda customer service at 1-800-222-5500, Option 4.
3. The repair is free.

Where do I find my VIN, and what do I tell the dealer?

Your VIN is the 17-character code on the lower left of the windshield, on your registration and usually on your insurance card. Enter it at nhtsa.gov/recalls to see whether this recall is still open on your car. When you call the dealer, say you have an open safety recall and give them NHTSA campaign number 20V346000. More in how recalls work.

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.

Other Mazda MAZDA3 recalls

May 29, 2025Mazda3 and CX-30 Air Bags May Not Deployhigh
Sep 3, 2024Mazda Camera Fault May Disable Safety Systemshigh
Oct 26, 2023Mazda3 Backup Camera Display May Go Blankmedium
Jul 14, 2023Mazda3 and CX-3 Rearview Camera May Malfunctionhigh
Nov 12, 2021Mazda Fuel Pump May Fail and Stall Enginehigh
Feb 22, 2021Mazda3 and CX-30 Tire Valves May Leak Aircritical

All 15 MAZDA3 recalls

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.