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Service bulletin RF-18-02R2

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10159196
Published by NHTSA2019-04-25
Manufacturer's numberRF-18-02R2
Manufacturer's date2019-04-04
NHTSA componentWHEELS; WHEELS:LUGS/NUTS/BOLTS/STUDS

NHTSA's summary

On May 1, 2018, Japan produced vehicles starting using 17 mm hex lug nuts instead of 21 mm on the same size thread. When installing new lug nuts or the accessory Wheel Lock Set, make sure to use the appropriate part number for the vehicle you are working on.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Wheels, Wheel nuts and studs

Vehicles listed
MAZDA !MX-52019
MAZDA CX-32019
MAZDA CX-52018, 2019
MAZDA CX-92018, 2019
MAZDA MAZDA32018
MAZDA MAZDA62018, 2019
MAZDA MX-52018

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
SA-028-182018-07-02. Service bulletin. Some vehicles with accessory installed wheel locks may have had the wrong kit installed using a 21 mm wheel lock key. As of May 01, 2018, Japan produced vehicles use 17 mm hex lug nuts instead of 21 mm on the same size thread. Follow the instructions below to replace the wheel lock kit with a 17 mm wheel lock key. NOTE: The Mazda3 produced in Mexico is not affected