BMW M135i Hidden Feature - Oil and water temps

M135i

Well-known member
I tried it.
Struggling with the code.
I did add the total of the last 4 digits. No luck
Tried adding the entire vin number total. No luck.
Tried adding the last 4and 3 numbers as a whole with last 1 and 2 as a whole as well. No luck.
But I do get to the unlock screen.
Just need the code


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M135i

Well-known member
Found this:
Will try it tomorrow:

Start the engine and keep the doors and boot closed so that you don't have a warning message displayed
Keep the odometer reset button pressed until the Board Computer screen changes (around 10 seconds)
Release the button when the screen changes. You'll see a nice menu with numbered options. To scroll through the options just press the odometer button
Go to option number 4 (UNLOCK) and then press the odometer button for a couple of seconds to enter the menu for this option. It will ask for the unlock code.
Don't panic! You have the code, it's the sum of your car's VIN number's last 5 digits. For example, if the last 5 digits on the VIN of your car are 12345, the code is 15.
To enter the code, you have to press the odometer button for as many times as the sum indicates. For the example we showed you at step 5, you'll have to press the button 15 times.
After inserting the code, press the odometer reset button for a couple of seconds to go to the previous menu, revealing the secret menu.
That's it! Now you can do all sorts of things with your hidden menu: check oil temps, coolant temps, MPG, etc. Enjoy!


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M135i

Well-known member
Pity u can't keep it displayed the whole time!!
Gotta unlock it each time which is frustrating


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M135i

Well-known member
Wonder if the dealers can't code it so it stays unlocked each time


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