To find the correct CCA rating, you should:
1. Check your owner's manual: This is the best source. It will specify the recommended battery group size and CCA rating for your specific vehicle.
2. Check the battery itself: The CCA rating is usually printed on the top or side of the battery.
3. Consult a parts store: Provide them with your vehicle's year, make, model, and engine size. They can look up the correct battery specifications.
Using the wrong CCA rating can lead to poor starting performance or battery failure. It's crucial to use a battery with at least the minimum recommended CCA. A slightly higher CCA is usually fine, but significantly higher isn't necessary and won't hurt.