Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE
Quick Lookups: Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Automatic Transmission Fluid | 2.0L Eng | 8.00 QTS. | 7.57 L | MAZDA Genuine ATF FZ | S | ||
| Brake Fluid | N/A | N/A | SAE J1703 FMVSS116 DOT 3 | Fill to line on reservoir. | S | ||
| Differential Gear Oil | Rear | 0.37 QTS. | 0.35 L | MAZDA Long Life Hypoid Gear Oil SG1 | S | ||
| Engine Coolant | 2.0L Eng | 7.00 QTS. | 6.62 L | Check the vehicle identification number on the vehicle identify cation number plate. Use FL22 type coolant in vehicles with the inscription "FL22" on the radiator cap itself or the surrounding area. For vehicles without "FL22" inscription use a mixture of demineralized water and ethylene-glycol-based coolant. Do not use solution that contains more than 60% antifreeze. Above -16Deg. C {3.2Deg. F} 65% water/35% coolant. Above -26Deg.C {-15Deg.F} 55% water/45% coolant. Above -40 Deg. C {-40Deg.F} 45% water/55% coolant. | S | ||
| Engine Oil | 2.0L Eng | w/Filter | 4.40 QTS. | 4.16 L | API - ILSAC GF-V or higher SAE 0W-20 Engine Oil | S | |
| Engine Oil | 2.0L Eng | w/o Filter | 4.20 QTS. | 3.97 L | API - ILSAC GF-V or higher SAE 0W-20 Engine Oil | S | |
| Fuel Tank | FWD | 13.20 GALS. | 49.96 L | S | |||
| Transfer Case Fluid | 0.37 QTS. | 0.35 L | MAZDA Long Life Hypoid Gear Oil SG1 | Replacement is necessary when the component is submerged in water. | S | ||
| Windshield Washer Fluid | N/A | N/A | Ultra-Clear Windshield Washer Fluid | S | |||
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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