2004 Subaru Legacy coolant capacity
The 2004 Subaru Legacy holds about 7.2 quarts of coolant, depending on the engine - the full cooling-system capacity when cold. The factory coolant is Subaru Long Life Coolant (green).
Key takeaways
- The 2004 Subaru Legacy holds about 7.2 quarts of coolant total, depending on engine.
- This is the full cooling-system fill with the engine cold.
- Coolant: Subaru Long Life Coolant (green). Refill to the marked level and don't mix coolant types.
| Engine | Capacity | Liters |
|---|---|---|
| 2.5L 4-cyl (EJ253), 7.1-7.2 qt by version | 7.2 qt | 6.8 L |
| 2.5L 4-cyl (EJ259), 7.1-7.2 qt by version | 7.2 qt | 6.8 L |
Which coolant the 2004 Subaru Legacy takes
The factory coolant is Subaru Long Life Coolant (green). Mixing coolant types can cause sludge and corrosion, so top up with the same product, or drain and refill completely when you switch.
Source: Subaru of America EndWrench technical magazine, "Cooling is Critical" (May 2008 issue), PEAK OET Antifreeze+Coolant Application Chart (Old World Industries). Confirm against your owner's manual or the label on the coolant reservoir.
What a coolant change costs
At roughly 1.8 gallons of capacity, the coolant itself is about $27 to $54. A shop charges $70 to $120 for a drain and fill, or $100 to $250 for a full flush. Use the specification the manufacturer lists - mixing coolant chemistries is what turns a cheap service into a water-pump job.
Ranges aggregated from published 2026 US repair-cost and parts price guides, including RepairPal and Car Talk. Prices vary by region, brand, and vehicle - treat these as a sanity check on a quote, not a fixed price. Drain and fill vs flush →
Coolant for your 2004 Subaru Legacy
Buy Subaru Long Life Coolant (green), or a coolant that says on the jug it meets the same spec. Check whether it is premixed 50/50 or concentrate before you pour. To compare prices and reviews:
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