Mazda MX3 wheel bolt & nut sizes
The Mazda MX3 (1991–1998) uses M12x1.5 wheel fixings with a 60° taper seat and a 21mm hex. It has 4 per wheel, so a full set is 16. Check the table below for the exact fixing for your year and wheel type.
Last updated 2 October 2026
Thread
M12x1.5
Seat
60° taper
Hex size
21mm hex
Strength
Class 8
Sizes by year and wheel type
| Image | Model code | Wheel type | Thread | Length | Seat | Hex size | Finish | Strength |
|---|---|---|---|---|---|---|---|---|
| 1991–1998 4 per wheel | ||||||||
| EC | Alloy Wheels | M12x1.5 | – | 60° taper | 21mm hex | Zinc + SS | Class 8 |
A dash in the length column means no length is listed for that fixing. Not sure which wheels you have? Steel wheels usually have a plastic trim cover over them.
Locking wheel keys for the Mazda MX3
Lost or damaged your locking wheel key? Find a replacement for your Mazda.
Common questions
What size are Mazda MX3 wheel bolts?
Mazda MX3 wheel fixings are M12x1.5 with a 60° taper seat and a 21mm hex.
How many wheel bolts does a Mazda MX3 need?
4 per wheel, so 16 for a full set of four wheels.