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 Toyota Mirai XLEFACTORY OEM SERVICE PROCEDURE
Quick Lookups: Fluids
| FLUID CAPACITIES | |||||||
|---|---|---|---|---|---|---|---|
| Fluid Type | Application | Standard | Metric | Fluid Spec | Note | S/H | |
| Automatic Transmission Fluid | 5.90 QTS. | 5.58 L | TOYOTA Genuine Automatic Transmission Fluid Type WS | Using Fluid other than TOYOTA Genuine Automatic Transmission WS will damage the Transmission. The fluid capacity is the quantity of reference. | S | ||
| Brake Fluid | N/A | N/A | SAE J1703 or FMVSS No. 116 DOT 3 SAE J1704 or FMVSS No. 116 DOT 4 | S | |||
| Engine Coolant | Fuel Cell Stack | 17.30 QTS. | 16.37 L | TOYOTA Genuine FC Stack Coolant | DO NOT use water or other kinds of coolant as they will cause damage. The capacity is a reference quantity. | S | |
| Engine Coolant | Inverter Coolant | 4.20 QTS. | 3.97 L | TOYOTA Super Long Life Coolant | DO NOT use plain water alone. The fluid capacity is the quantity of reference. | S | |
| Fuel Tank | For models of JPD20L-CEDBSA | 30.80 GALS. | 116.59 L | The model code is indicated on the manufacturer’s plate or label. This is the maximum possible fill amount. The actual fuel amount achieved at hydrogen stations may be different due to station capacity or station settings. | S | ||
| Fuel Tank | For models of JPD20L-CEDSSA and JPD20L-CEDHSA | 37.50 GALS. | 141.95 L | The model code is indicated on the manufacturer’s plate or label. This is the maximum possible fill amount. The actual fuel amount achieved at hydrogen stations may be different due to station capacity or station settings. | S | ||
Factory Service Tools
Use the Manual With the Right Hardware
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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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