2026 BMW 3 Series coolant capacity
The 2026 BMW 3 Series holds about 4.4 to 7.4 quarts of coolant, depending on the engine - the full cooling-system capacity when cold.
Key takeaways
- The 2026 BMW 3 Series holds about 4.4 to 7.4 quarts of coolant total, depending on engine.
- This is the full cooling-system fill with the engine cold.
- Refill to the marked level, and use the coolant type your owner's manual specifies.
| Engine | Capacity | Liters |
|---|---|---|
| 318d | 7.4 qt | 7 L |
| 320i PF | 4.4 qt | 4.2 L |
| M340i PF | 4.8 qt | 4.5 L |
When refilling, add coolant to the marked level rather than forcing in the full figure. Source.