2021 Mazda Mazda3 Bulb Sizes & Tire Sizes

Last reviewed September 30, 2026

The short answer

The 2021 Mazda Mazda3 has sealed LED headlights with no replaceable low-beam bulb, and came on 205/60R16, 215/45R18, 215/45R18 (2.5 Turbo Sedan, 2.5 Turbo Hatchback, 2.5 Turbo Premium Plus Sedan, 2.5 Turbo Premium Plus Hatchback) depending on trim.

Some values on this page are still waiting for a second source. We show what we have and mark it; confirm against your owner's manual before you buy.

Tire sizes by trim

All trims 205/60R16 92H · 36 psi See tires at Amazon
All trims 215/45R18 89V · 36 psi See tires at Amazon
2.5 Turbo Sedan, 2.5 Turbo Hatchback, 2.5 Turbo Premium Plus Sedan, 2.5 Turbo Premium Plus Hatchback 215/45R18 89V · 38 front / 36 rear psi See tires at Amazon

The size on the placard inside the driver's door jamb is the one your car left the factory with. Match that, not this table, if they differ; a previous owner may have changed wheels.

Bulb sizes

Low beam Sealed LED, no replaceable bulb
High beam Sealed LED, no replaceable bulb
Fog light Sealed LED, no replaceable bulb
Daytime running Sealed LED, no replaceable bulb
Front turn signal Sealed LED, no replaceable bulb
Rear turn signal Sealed LED, no replaceable bulb
Brake light Sealed LED, no replaceable bulb
Tail light Sealed LED, no replaceable bulb
Reverse light Sealed LED, no replaceable bulb
License plate Sealed LED, no replaceable bulb

Wheel specs and lug torque

Bolt pattern 5x114.3 mm (5x4.5")
Factory wheel sizes 16x6.5, 18x7

Key fob, battery and sensors

Key fob battery CR2032 Shop on Amazon
Relearn auto (drive)

Dimensions, weight and fuel

Figures for the 4-door sedan.

Length 183.5" (466 cm)
Width 70.7" (180 cm)
Height 56.9" (145 cm)
Wheelbase 107.3" (273 cm)
Fuel Gasoline
Octane 87 (regular)
Fuel tank 13.2 gal (50 L)

Worth knowing about the 2021 Mazda3

  • LED lighting. The low beam, high beam, fog light, daytime running, front turn signal, rear turn signal, brake light, tail light, reverse light, license plate are sealed LED units with no user-replaceable bulb. A failure means replacing the assembly.
  • Bulbs. Some models use WY5W bulbs in the front parking and side-marker lamps.
  • Spare. This vehicle carries a compact (temporary) spare.
  • Tire chains. The manual permits chains or cables, on the drive wheels only, fitted to the standard tire size. Chains for this size on Amazon →
  • Tires. The manual allows chains on the front tires only and names no size limit, and the compact spare is a T125/70D16 on FWD models or a T125/80D16 on AWD models.
  • Wheels. The manual gives a lug nut torque range of 80 to 108 lb-ft.
  • Dimensions. The figures above are for the 4-door sedan; other body configurations differ in length, wheelbase and weight.
  • Dimensions. The 5-door hatchback is 175.6 inches long and 56.7 inches tall.
  • Fuel. AWD models hold 12.7 gallons.