How do you test a brake servo on an electric car?

I know that electric cars have some more advanced braking systems than the hydraulic or mechanical systems that ICE cars use. But I’m wondering how to test a brake servo on an electric car—and whether they even have one?

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Answer provided by
Jason Crosby
Answered on Jun 09, 2022
Testing the brake servo on an electric car can actually require you taking apart your vehicle’s wheel hub to see whether there are any mechanical issues going wrong with your car’s braking system. With regenerative braking being used on most electric cars, it’s probably best to keep things simple and conduct a road test instead.
Testing a brake servo on an electric car can be done by finding a quiet street on which you can check your vehicle’s braking response. Get your car up to around 30 mph or so, then apply a moderate amount of pedal pressure in order to see whether your electric car’s regenerative braking responds as normal.
This may seem confusing—after all, how will you know whether the servo is working? But, for most of us who aren’t mechanics, a road test is the simplest way to make sure our brake servos are working properly.
A brake servo is a form of brake boosting, something that helps improve the responsiveness of your brakes. Essentially, these servos work to lessen the pressure required for your brakes to clamp down on your vehicle’s rotors. Kind of like how Jerry works to take the pressure off of you to find the most affordable car insurance rates.
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