rwitkin

CarGuyNVA

Yikes! Hope you avoided having an accident or other mishap as a result. I've certainly not experienced that on my Macan, nor any other vehicle I've owned for that matter.

That's a serious issue! It's a 2017 (warranty), so I'd get it into your nearest P dealer ASAP (preferably on a flatbed!).

rwitkin

Being towed as we speak. I'm surprised that I have the only Macan in the U.S. with this very serious problem I had to use the emergency brake to avoid collision.

CarGuyNVA

Geez, scary! Glad it's on the way in to the dealer. Please keep us updated on what they find.

NC TRACKRAT

Whoa! How fast were you going? How did you apply the electric parking brake without any modulation? Was it an abrupt lock-up? Any deviation from straight-line?

ozziegt

Electronic parking brakes are designed to be engaged while moving since they are emergency brakes:

rwitkin

wwahl

There is more going on here than just a puddle. When you get the bill back from the Porsche repair please share the details with us.

Petza914

Wow - glad you weren't going faster !

Strange to me that you would let this occur twice, unless both times were in the same trip and just a couple minutes apart. With the brake pedal not moving at all, how hard did you try to force it down before activating the electric parking brake. My guess is you have a problem with the brake booster so you got no power assist to the brake pedal after something related to the brake booster got splashed by the puddle water. If you forced the brake pedal harder, you might have gotten some stopping effect, even though it didn't feel like you would because the power assist was gone.

Nissan/Infiniti had a problem with their QX56s, Armadas, and Titan trucks where you would lose all braking ability like the car was shut off, even though it wasn't. Turned out to be a fault of the Delta Stroke sensor - happened to ours with my wife at the top of the driveway. Cost $1,200 to get it replaced with the new, upgraded part and it wasn't long after we sold the QX and bought the Cayenne. Nissan eventually lost a lawsuit and compensated owners who had to replace it with $400. Thanks Nissan for keeping me from buying any of your products in the future.

rwitkin

go.illini

Sounds like there's an issue with the booster which would explain why the pedal seemed hard. Total brake failure would typically mean loss of brake fluid from both circuits which is extremely unlikely unless someone is trying to collect your life insurance.

If it's a booster issue, the brakes are still fully functional. In an unexpected situation it may seem like hitting a wall but that's just at the point when you're starting to actually engage the brakes. I've had this happen on the track and it can induce some puckering for sure. Additional effort will apply the brakes - even if it takes both feet. Now when the pedal goes to the floor and there is no deceleration, that's when to panic and grab the emergency brake. I've had that happen on the track too.

Loess

Todd B

It's possible it could be an ABS issue. The super hard pedal sounds like the ice pedal issue with a car on track. When it happens the brake pedal is super hard, no matter how much force you use to push the car will not slow down. You have to pump the brakes to get control again. When you were braking, how were you doing it, a quick jab or slow push on the brakes? The ice pedal is induced by a jab on the brakes, there's other factors that help induce it. Basically the ABS thinks the car is on a slick surface and limits the amount of braking being applied. Also could be an issue with the speed sensors at the wheels or the ABS computer. But like others have said you would think there would some faults in the system.

Is braking restored once you turn the car off and back on?

rwitkin

go.illini

While possible I've not read about this happening at 10mph in street conditions so the probability seems very low. I'm glad I've never experience anything like that on the track!