The recommended frequency for checking and changing the battery coolant in an electric vehicle (EV) varies depending on the manufacturer and the specific cooling system design. However, some general guidelines can be drawn from industry practices and manufacturer recommendations:
- Coolant Check and Change Interval: Many sources suggest changing the battery coolant every 80,000 to 150,000 miles or approximately every 5 to 10 years. For example, some manufacturers recommend a coolant service interval around 80,000 miles, while others set it as high as 150,000 miles or every 5 years, whichever comes first.
- Inspection Frequency: The coolant system should be inspected regularly for leaks and performance issues. Some manufacturers require the coolant system to be inspected and pH tested annually or every two years to ensure the fluid condition remains optimal.
- Variability Among Brands: There is considerable variability depending on the EV brand. Tesla, for instance, states that its coolant never needs to be changed, whereas Mercedes-Benz recommends coolant checks and possible replacement at intervals around 124,000 miles. Hyundai and Kia advise coolant servicing at approximately 80,000 miles.
- Why It Matters: The coolant is essential for thermal management of the battery, helping to dissipate heat and prevent overheating. Although the coolant in EVs does not degrade as quickly as in internal combustion engines due to its sealed nature and limited chemical interaction, checking for leaks and fluid integrity is important for safety and battery longevity.
In summary, the battery coolant in an electric vehicle should typically be checked at least every 1 to 2 years and changed roughly every 80,000 to 150,000 miles or about every 5 to 10 years, depending on the vehicle manufacturer’s specifications. Always refer to the specific EV manufacturer’s maintenance schedule to avoid voiding warranties and ensure optimal performance.
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