dropped my engine coolant cap

JARblue

Remove the engine undershroud (like you would to do an oil change). It's probably down there. You could probably lift the car (use the scissors jack in the hatch if you don't have one) and tap on the bottom of the undershroud to determine if it fell down that far before actually removing it. Though I suspect you will have to remove it regardless to get the cap out.

Any dealership should be able to get one for you. Or there may be some aftermarket options.

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