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NHTSA campaign 20V346000 · Mazda campaign 4420F

Mazda Recall 20V-346: Front Brake Caliper Bolts May Loosen and Fall Off

NHTSA recall 20V346000 (Mazda campaign 4420F) was reported by Mazda North American Operations on June 12, 2020, with 24,037 vehicles potentially affected (per NHTSA). NHTSA's record lists the Mazda CX-30 and Mazda MAZDA3 for the 2020 model year. Owners were notified on July 24, 2020, 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 20V346000 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.

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

Key facts

NHTSA campaign
20V346000 (also written 20V-346 or 20V346)
Filed by
Mazda North American Operations
Mazda campaign number
4420F
Report received
Potentially affected
24,037 vehicles (per NHTSA)
Component
Service Brakes, Hydraulic — Foundation Components — Disc — Caliper
Owners notified

Repair completion: 98.53% (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 20V346000. 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.

Mazda

All Mazda recalls

NHTSA's recall notice

As NHTSA's recall record states it for campaign 20V346000.

Defect description

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 consequence

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.

Manufacturer 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.

Sources

Official NHTSA notice for recall 20V346000

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.