Toyota Mirai Fluid Capacities
Factory manual fluid capacities for the Toyota Mirai. Exact capacities and specs extracted from the LEMON service manual archive.
Last updated: 2026-10-29 • Reading time: 8 min • By AllOEMManuals Editorial Team
Quick Answer
2021-2024 Toyota Mirai: 5.90 QTS. (5.58 L) — TOYOTA Genuine Automatic Transmission Fluid Type WS Note: Using Fluid other than TOYOTA Genuine Automatic Transmission WS will damage the Transmission. The fluid capacity is the quantity of reference.
| Generation | Years | Top spec |
|---|---|---|
| 2021-2024 | 2021-2024 | 5.90 QTS. (5.58 L) — TOYOTA Genuine Automatic Transmission Fluid Type WS Note: Using Fluid other than TOYOTA Genuine Automatic Transmission WS will damage the Transmission. The fluid capacity is the quantity of reference. |
| 2020 | 2020 | 4.40 QTS. (4.16 L) — TOYOTA Genuine Automatic Transmission Fluid Type WS Note: Using Fluid other than TOYOTA Genuine Automatic Transmission WS will damage the Transmission. The fluid capacity is the quantity of reference. |
| 2017-2019 | 2017-2019 | 1.65 LBS. (0.74 KG) — HFC-134a (R134a) Note: Approximate capacity. |
This vehicle's factory manual
The spec is above. This opens the 2021 Toyota Mirai factory book. Use another year if yours is older.
Toyota Mirai maintenance schedule
Know the exact fluid capacities job for your Toyota Mirai
2021-2024 Toyota Mirai: 5.90 QTS. (5.58 L) — TOYOTA Genuine Automatic Transmission Fluid Type WS Note: Using Fluid other than TOYOTA Genuine Automatic Transmission WS will damage the Transmission. The fluid capacity is the quantity of reference.
Fluid type and capacity can change by engine, drivetrain, and transmission. Verify the exact branch before filling anything. Once the spec is confirmed, use the supplies and purchase links below to build the full one-trip shopping list before you start the repair.
Exact Vehicle Check
The button opens the factory book for this vehicle. Use the engine picker only when your trim is not the one this page already matched.
2021-2024
- →Using Fluid other than TOYOTA Genuine Automatic Transmission WS will damage the Transmission. The fluid capacity is the quantity of reference.
- →DO NOT use water or other kinds of coolant as they will cause damage. The capacity is a reference quantity.
- →DO NOT use plain water alone. The fluid capacity is the quantity of reference.
- →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.
2020
- →Using Fluid other than TOYOTA Genuine Automatic Transmission WS will damage the Transmission. The fluid capacity is the quantity of reference.
- →DO NOT use water or other kinds of coolant as they will cause damage. The capacity is a reference quantity.
- →DO NOT use plain water alone. The fluid capacity is the quantity of reference.
2017-2019
- →Approximate capacity.
- →Using Fluid other than TOYOTA Genuine Automatic Transmission WS will damage the Transmission. The fluid capacity is the quantity of reference.
- →DO NOT use water or other kinds of coolant as they will cause damage. The capacity is a reference quantity.
- →DO NOT use plain water alone. The fluid capacity is the quantity of reference.
2016
- →Approximate capacity.
- →Using Fluid other than TOYOTA Genuine Automatic Transmission WS will damage the Transmission. The fluid capacity is the quantity of reference.
- →DO NOT use water or other kinds of coolant as they will cause damage. The capacity is a reference quantity.
- →DO NOT use plain water alone. The fluid capacity is the quantity of reference.
Manual already checked Amazon for you
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Toyota Mirai Fluid Service Kit
Buy all the fluids your Toyota Mirai needs in one cart.
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Fluids — Manual's Parts List
Everything for a full fluid service weekend.
- 1Engine OilShop →
Match viscosity to your spec
- 2CoolantShop →
Match color/chemistry — never mix types
- 3Long-Neck FunnelShop →
Transmission and differential fill holes are recessed
- 4Fluid Extraction PumpShop →
Remove old brake fluid from reservoir without mess
- 5Shop RagsShop →
You will need more than you think
Get everything at once
One search shows all of the above on a single page.
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One-Trip Shopping List
Recommended supplies and tools for this job, grouped so you can buy everything before the repair starts.
Fluid Extraction Pump
Cleanly remove old fluids from reservoirs.
Clean Shop Rags
Lint-free rags for cleaning dipsticks and spills.
Multi-Purpose Funnel
Long-neck funnel for hard-to-reach fill points.
Nitrile Gloves
Keep hands clean during multi-fluid maintenance.
Project Essentials
Basic tool sets, gloves, and cleaning supplies for your Toyota Mirai so the job is ready when the parts arrive.
Frequently Asked Questions
- Where is this data from?
- Extracted directly from the LEMON factory service manual archive. Sources are cited per generation.
- What fluid capacities does a Toyota Mirai use?
- 2021-2024 Toyota Mirai: 5.90 QTS. (5.58 L) — TOYOTA Genuine Automatic Transmission Fluid Type WS Note: Using Fluid other than TOYOTA Genuine Automatic Transmission WS will damage the Transmission. The fluid capacity is the quantity of reference.
- Why do fluid capacities vary by generation for the Toyota Mirai?
- Different engine options, transmission types, and cooling system designs across model years change total fluid volumes. Always use the capacity listed for your exact year and engine code — do not guess across generations.
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Author & Review
Published by AllOEMManuals, founded by Lyndon Bedford, an automotive technician with 20 years of experience. He owned and operated a mechanic shop in Hurst, Texas from 2014 to 2022 and continues hands-on repair work.
Content may combine manual references, general repair templates, and AI-assisted drafting. Confirm the source, vehicle configuration, and applicability before working. Report corrections through our contact page.
Last updated: 2026-10-29