2003 Toyota Highlander coolant capacity
The 2003 Toyota Highlander holds about 6.8 to 12.3 quarts of coolant, depending on the engine - the full cooling-system capacity when cold.
Key takeaways
- The 2003 Toyota Highlander holds about 6.8 to 12.3 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 |
|---|---|---|
| 2.4 16V 2WD (CAN) ACU20 | 9 qt | 8.5 L |
| 2.4 16V 2WD (CAN) ACU20 | 6.8 qt | 6.4 L |
| 3.0 V6 24V 2WD (CAN) MCU20 | 9.9 qt | 9.4 L |
| 3.3 V6 32V 2WD (USA) MCU21 | 12 qt | 11.4 L |
| Hybrid 2WD (USA) MHU23 | 12.3 qt | 11.6 L |
When refilling, add coolant to the marked level rather than forcing in the full figure. Source.