this post was submitted on 22 Nov 2025
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Why is the parking brake involved with the computer at all....
It's an electronic parking brake. Those are common now because a small switch takes up less interior space than a lever for a cable-actuated parking brake, and the computer can disengage the parking brake if it detects that the driver is attempting to drive with it activated. The computer is involved in brake pad replacement to tell the parking brake motor to open to its widest position to accept new pads, and calibrate itself to their thickness.
This requires a special adapter and software subscription rather than a button on the infotainment screen because Hyundai is engaging in rent-seeking and perhaps trying to direct business to its dealers.
So if your brakes go out and you try to use the parking brake for a slow stop it won't do anything anymore?
Correct, though the car in question here is electric and will almost certainly use the motors to slow the car to reuse that energy. The motors should be able to stop the car even if the hydraulic brakes fail, and probably more effectively than a mechanical parking brake.
apparently some do and some don't. or they require a particular cheat code when pressing the button, idk.
the point is, you can't trust your parking brake to be an emergency brake anymore, you press a button and hope something happens
Every vehicle I've had with an electric parking brake operated the same way. Hold the park button while moving and it starts clamping the parking brake down, let off the button and it starts to release. So you can basically PWM the parking brake in an emergency.
~~Capitalism~~ Progress!
Guess I'll add this to the list of reasons I'm keeping my current car until it falls apart.
Because OEMs have all decided that the mechanical one was insufficient...
Part of it is space savings or just making the interior more appealing. Why have this huge space dedicated to the parking brake (hand lever) and gear shift.
Welcome to the future…(toggle switch to the right is the parking brake)
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My favorite is one of my parents vehicles…let’s put the gear shift next to the radio and the radio controls down by the HVAC.
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Never seen the third pedal on an American car/truck?
It's not a "huge space" and the reason is because they're significantly less expensive, more reliable, and easier to adjust and repair.
I own a truck with such a pedal and I own a manual car. I’ve only ever had the pedal on trucks. All the cars I’ve ever owned have all been hand levers(regardless of transmission). If it wasn’t clear…I’m not arguing for this change but I semi-understand why it’s coming.
I’m not happy about the near entire extinction of the manual transmission in the US either. There are only a handful of cars that even offer it anymore and most of those are performance models with hefty price tags.
They put them in cars, too...
That’s not what I said. I said I’ve never owned one. They’re far more common on trucks/vans. I know cars have them. Usually more towards the luxury side of the market but that again comes down to making the interior look more streamlined and fancy.
I'm not sure what your point was in that statement if not to infer that they don't exist.
Conversely…they put the electric parking brakes in the higher trims of American trucks too. So what’s your point?
My point is the electric parking brakes are not necessary or beneficial in any way. They only serve to make the vehicle more expensive and less reliable.
Most manufacturers don’t do something simply to make stuff more expensive. If anything I’ve seen them make really dumb decisions cause it saves them 25 cents per vehicle…but they make 800K of them a year. Which is 200k in savings for a single part.
One of the major benefits and drawbacks to a mechanical parking brake is the physical cable that needs to be routed. It needs to be protected from the elements, exhaust heat, etc. Removing that frees them up to design other parts differently which could lead to more cost savings. That’s parts both inside and outside the vehicle.
On my truck with a mechanical parking brake actuated by a pedal the rear rotor is also a drum brake. The parking brake uses the inside of the disc rotor as a drum brake while the normal brakes use the calipers and pads like a normal disc brake. The electric parking brake version has none of the drum brake components. It’s basically a traditional disc brake setup with motor hanging off the back of the caliper to squeeze the pads.
I’m nearly positive the electric parking brake version is cheaper overall to implement. It doesn’t have two full braking systems in the rear. I’d imagine there are potential warranty savings here as well as dealer hours. The electric brakes don’t need adjustment like the manual ones do after changes. And while the ‘maintenance mode’ as discussed in the article can be abused not all manufacturers do that. Some just make you do a series of steps and done. No computer needed at all.
I’ll agree reliability is a concern as the electric brake won’t actuate when the power is off. However, it does stay clamped in the event the battery dies.