Correct coolant for this platform
Match chemistry and color family before topping off or flushing.
Mixing coolant types can cause gel formation and overheating.
Check Price and Fitment🧪Fluid Capacities
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: 2026-05-12 • 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. |
Factory Manual Verification
Cross-check these specs against the official Toyota Mirai maintenance schedule.
Factory Manual ConfirmationFluid Capacities
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
Use the archive navigator when you need the exact engine, trim, or production-branch manual instead of a broad year-range summary. That keeps the buying list and repair steps aligned with the real vehicle.
Open the manual links above to confirm the exact engine and trim branch before ordering parts.
2021-2024
2021-2024Automatic Transmission Fluid5.90 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.
Brake Fluid— SAE J1703 or FMVSS No. 116 DOT 3 SAE J1704 or FMVSS No. 116 DOT 4
Engine Coolant4.20 QTS. (3.97 L) — TOYOTA Super Long Life Coolant Note: DO NOT use plain water alone.
The fluid capacity is the quantity of reference.
Fuel Tank37.50 GALS. (141.95 L) Note: 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.
Notes
- →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
2020Automatic Transmission Fluid4.40 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.
Brake Fluid— SAE J1703 or FMVSS No. 116 DOT 3 SAE J1704 or FMVSS No. 116 DOT 4
Engine Coolant5.00 QTS. (4.73 L) — TOYOTA Super Long Life Coolant Note: DO NOT use plain water alone.
The fluid capacity is the quantity of reference.
Fuel Tank32.30 GALS. (122.26 L)
Notes
- →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
2017-2019Air Cond Refrigerant1.65 LBS. (0.74 KG) — HFC-134a (R134a) Note: Approximate capacity.
Automatic Transmission Fluid4.40 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.
Brake Fluid— SAE J1703 or FMVSS No. 116 DOT 3
Engine Coolant5.00 QTS. (4.73 L) — TOYOTA Super Long Life Coolant Note: DO NOT use plain water alone.
The fluid capacity is the quantity of reference.
Fuel Tank32.30 GALS. (122.26 L)
Notes
- →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
2016Air Cond Refrigerant1.65 LBS. (0.74 KG) — HFC-134a (R134a) Note: Approximate capacity.
Automatic Transmission Fluid4.40 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.
Brake Fluid— SAE J1703 or FMVSS No. 116 DOT 3
Engine Coolant1.20 QTS. (1.13 L) — TOYOTA Super Long Life Coolant Note: DO NOT use plain water alone.
The fluid capacity is the quantity of reference.
Fuel Tank32.30 GALS. (122.26 L)
Notes
- →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.
Ready to BuyFitment-first picks for Toyota Mirai
Buy the Exact Parts and Tools for This Job
These links are built from the same specs shown on this page so users can move from lookup to purchase faster. Confirm exact engine and trim if your vehicle has multiple variants, then build the full cart before you step away from the computer.
Affiliate disclosure: We may earn a commission at no extra cost to you. The goal is to get you to the right parts in one pass.
Spec Snapshot
- Engine Coolant
- 4.20 QTS. (3.97 L) — TOYOTA Super Long Life Coolant Note: DO NOT use plain water alone. The fluid capacity is the quantity of reference.
- Automatic Transmission Fluid
- 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.
- Brake Fluid
- — SAE J1703 or FMVSS No. 116 DOT 3 SAE J1704 or FMVSS No. 116 DOT 4
Transmission fluid for your gearbox
Fluid choice must match the transmission specification.
Incorrect ATF is a common cause of poor shift quality.
Check Price and FitmentBrake fluid and bleed kit
DOT-rated fluid plus simple bleeding tools.
Moisture-heavy brake fluid lowers boiling performance over time.
Check Price and FitmentLong-neck funnel and extractor
Useful for topping off and moving fluids cleanly.
These save time when the fill point is awkward or hidden.
Check Price and FitmentShop towels and gloves
Basic cleanup gear for any fluid service job.
Cleanup tools make every service easier and safer.
Check Price and FitmentBefore you buy, sanity-check the repair quote and the cart
If your shop quote looks high, run it through Quote Shield to catch overpricing before checkout. Then use the parts links above to lock in the one-trip plan.
One-Trip Shopping List
Recommended supplies and tools for this job, grouped so you can buy everything before the repair starts.
💉Shop →
Fluid Extraction Pump
Cleanly remove old fluids from reservoirs.
🧹Shop →
Clean Shop Rags
Lint-free rags for cleaning dipsticks and spills.
🌪️Shop →
Multi-Purpose Funnel
Long-neck funnel for hard-to-reach fill points.
🧤Shop →
Nitrile Gloves
Keep hands clean during multi-fluid maintenance.
🧰View All →
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.
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Author & Review
Written by AllOEMManuals Editorial Team. Reviewed by ASE-certified technicians and updated with factory-reference checks for fitment-sensitive steps.
This guide was drafted with AI assistance and reviewed for accuracy by a human editor.
Last updated: 2026-05-12