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The 2003 Toyota Corolla holds approximately 6.9 quarts of coolant, and the manual recommends using Toyota's long life coolant or a similar alternative. The coolant is ethylene-glycol based, which helps protect the aluminum parts in your vehicle. Monitoring the coolant level is simple as the clear reservoir is labeled with minimum and maximum levels. If you see that the coolant is low, simply add more. To access the reservoir in this vehicle, you will need to remove the plastic engine cover.
The Toyota Corolla from 2003 can hold up to 6.9 quarts of coolant.