# NHTSA recall 20V346000

A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.

- Published by: NHTSA \(United States\)
- Campaign number: 20V346000
- Manufacturer's number: 4420F
- Manufacturer: Mazda North American Operations
- Reported: 2020\-06\-12
- Owners notified: 2020\-07\-24
- Component: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
- Units potentially affected: 24037
- Part numbers: DGH9\-33980, DGH9\-33990, DGK9\-33980, DGK9\-33990, BDST\-33980B,

## What is wrong

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.


## What can happen

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.


## The 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.


## 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.safercar.gov.


## Remedy progress the manufacturer reported

- Report: Annual report 3, for 2024 quarter 3 to 2025 quarter 2
- Filed with NHTSA: 2025\-08\-21
- Vehicles in the campaign: 24037
- Reported remedied: 23681 \(98%\)
- Reported unreachable: 0
- Reported removed: 3

These are the manufacturer's totals for the whole campaign at the end of 2025 quarter 2, as filed with NHTSA. They do not say whether one vehicle has been remedied: check the VIN with the official lookups. The reports are from data as of 2026\-10\-19.

## Vehicles this campaign lists

- [2020 MAZDA CX\-30](/makes/mazda/cx-30/2020/recalls.md)
- [2020 MAZDA MAZDA3](/makes/mazda/mazda3/2020/recalls.md)

## Check a VIN

- [NHTSA recall lookup by VIN, United States](https://www.nhtsa.gov/recalls)
- [Transport Canada recall search, Canada](https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng)

JSON: [/v1/recalls/nhtsa/20V346000](/v1/recalls/nhtsa/20V346000)

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