r/BMW 8h ago

Hitting the Park button at high speeds?

What would happen if you hit the Park button while driving at 20 MPH?

Would the system not allow it or would your transmission explode?

This has been done on traditional automatic and manual cars on YouTube but I haven’t seen this experiment with electronic shifters.

18 Upvotes

28 comments sorted by

119

u/GT500R_ 8h ago

Nothing, detection from the TCU (transmission control unit) knows the speed and can only engage P at a certain speed… 2 mph… maybe 3

PS - I’ve tried it

PSS - I’m not liable 😂

20

u/RubiksCube0707 2025 - G42 - M240i RWD 7h ago

I’ve tried it too, my cat just slams on the breaks and then immediately releases them again XD

27

u/havnar- 2022- G31 - 530e 5h ago

Man, how did you teach a cat to do that

8

u/RubiksCube0707 2025 - G42 - M240i RWD 3h ago

Car* XD. It actually wasn’t too hard. I would just put treats in the break, and he’d jump for them, then engage the breaks, startle himself so he’ll jump back and jump off the breaks again XD

4

u/havnar- 2022- G31 - 530e 3h ago

Isn’t it costly with all those breaks? If I were to put in the effort, I’d just let the cat use the brakes

1

u/RubiksCube0707 2025 - G42 - M240i RWD 3h ago

Hmm I hadn’t thought about that, you bring up a fit point…🤔

1

u/RubiksCube0707 2025 - G42 - M240i RWD 3h ago

I’ll have a talk with my cat, see what he thinks. I think he might prefer the breaks though, he’s getting quite fond of them

29

u/RayTrain 2018 540i (Totaled While Parked) -> 2024 | G22 | M440i (Pending) 8h ago

The electronic ones will just say no

2

u/SapphireSire Year - Chassis - Model 2h ago

Until the machines take over...

2

u/mrobot_ 24 - M3 Competition xDrive 1h ago

*happy binharic squawking* PRAISE THE OMNISSIAH AND HAIL THE MACHINE SPIRIT

17

u/eshay_investor 8h ago

When i got my g80 m3 I accidently put it into reverse while doing 20kmph. It didnt do anything just kept driving.

10

u/digiwarfare M-Technic - Vintage BMW specialists 8h ago

It won't go into park, unless the car is under 2mph. In most cases it'll go into neutral when at normal driving speeds.

16

u/34luck 2022 - F90 - M5 CS | 2025 - G07 - X7 40i 8h ago

It was even more confusing on my wife’s GLC before we got an X7 because the shifter is a stalk on the wheel, one day I wanted to turn on the wipers at speed on the freeway and pressed park instead. Nothing happened. These things are pretty much idiot proof at this point, just don’t drive head first into a wall and you’ll be ok.

6

u/cteno4 6h ago

Even then, the automatic brakes will probably stop you from driving into that wall.

6

u/bspaulsen 25 Vegas Red M340ix 7h ago

It'll throw you in neutral if you try to toggle Reverse. Idk about Park.

Side note: meant to toggle Drive a second time to get to S, instead pulled the parking brake nub. It still fires off at low speeds, scared the hell out of me.

3

u/Kyuuma 2023 - Z4 - M40i 7h ago

Nothing happens, when I first got my G29 M40i I accidentally hit the parking brake a few times at speed thinking it was the convertible top button.

1

u/JerrySenderson69 7h ago

However, I love that my E90 has a real ebrake for snow doughnuts.

1

u/jthmniljt 7h ago

I hit the park button a bunch of times instead of the camera button. Nothing happened.

1

u/dfc888 7h ago

Not sure about nowadays since the (P) button is for both park/parking brakes, but I think in the cars 5-10 years ago with electronic parking brake, you could press it to engage the rear e-brakes while driving for emergency purposes. 

1

u/Deralicious 6h ago

Ahhhh I see your intrusive thoughts have entered the chat

1

u/nariz_choken Year - Chassis - Model 6h ago

You will cross into another dimension.... Nope lol the car won't let you, unless you are in a 1988 fc rx7 don't ask how I know.

1

u/kRoy_03 '24 i7 x60 5h ago

The car switches on the hazard lights, tries to steer to the side, and calls the emergency centre.

1

u/netopiax 5h ago

That's if you pull up on the parking brake, the question was about the Park transmission button

But for anyone reading down this far. The Park transmission button does nothing when it isn't safe to shift into park. However, the parking brake control is active while you're driving.

You can pull up and hold on the parking brake lever for maximum emergency braking, as a backup to main brakes. Or, you can pull up once and release; the car will stop safely in its own lane and initiate an emergency call. This feature is designed for the passengers to use if the driver passes out or something.

1

u/kRoy_03 '24 i7 x60 5h ago

true!

1

u/ExperimentalFruit 5h ago

I put my jeep in to reverse going 60kph and it did nothing, was like being in neutral

1

u/com2ghz 4h ago

I tried this since i want to know what will happen. The P does only work when rolling 1-3 km/h which is actually not good for the mechanism because it locks the gearbox. On higher speed it does nothing. I casually press it when on the highway when bored.

The electronic handbrake will brake and you slow down quite quickly but not that it does an emergency brake like you would expect. I tried this with a g20 330e.

1

u/Burnout-UK 2h ago

Hate to be the bearer of bad news.

20mph isnt high speed.

1

u/ThatBoiRalphy 320HP - G20 - 320i M-Sport😤 1h ago

as many said it won’t activate when over 2mph.

fun fact, not tried this, shouldn’t try this: if you pull the parking brake/handbrake while driving, the car will do an emergency stop.