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I have a 2017 Rav-4 Hybrid Limited with only about 500 miles on it. There is a buzzing noise lasting about 5-10 seconds each time the drivers door is opened. Normal? Does everyone notice this? Is it a leveling operaton? Thanks
 

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I believe it is an electrical pump to pre-charge the brake system. Normally a car has a vacuum boost from the ICE, but since it does not run continuously on a hybrid, there has to be another system to help assist the brakes.
 

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It is normal, just making pressure for the brakes so it is ready to run like a flux capacitor!

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