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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > What's the correct normal operatiting temperatures for the N52



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      04-22-2013, 04:25 PM   #23
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No just the numbers after "KR"
Strange that it does not work on your car. Yep, just the numbers, not the letters. Does it not show the lock as off after entering the added numbers?

Here's the complete instructions for the BC Hidden Menus...
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      04-23-2013, 09:35 AM   #24
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      04-23-2013, 10:07 AM   #25
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Thanks for BC hidden code link, and it worked once I added up just the last 7 digits of Vin#.

My temp was from 199F to 219F from 30 mins of driving home from work.

PS I love how it stays on until you either turn off car or hit trip button again.

Good stuff!

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      04-23-2013, 06:46 PM   #26
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I might of done a bad thing? When trying to exit the system I accidentally activated the reset system.

What exactly did I do? Did it wipe out latest software version that dealer installed back in Jan?

Thanks for any help on this,
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      04-24-2013, 07:29 AM   #27
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Anyone? Know what exactly all I reset?

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      04-24-2013, 08:05 AM   #28
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Have no idea! Does it mention anything about it on that link I posted? As far as I know, this hidden menu is literally just a way of accessing information, and nothing that is done there is permanent or potentially harmful to the car, but with that said, I am always very very careful about what I do and find out first before taking a chance.

I highly doubt that it would have changed your software, if it was as quick and easy as that then the dealers would be able to update the software a lot quicker/easier too! Has anything actually changed since this reset?
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      04-24-2013, 09:28 AM   #29
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Well it says software reset on that page...

It reset clock, average mileage, average speed & brightness of cluster.

So far that's all I noticed...

Thanks,
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      04-26-2013, 05:51 PM   #30
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Well it says software reset on that page...

It reset clock, average mileage, average speed & brightness of cluster.

So far that's all I noticed...

Thanks,
MrD
Well, menu 1.06 shows software version, maybe see if it is the same as the one that you say was recently loaded. The only other thing that I can think that it would have possibly reset (not sure, just a guess) is the various adaptations...
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      04-29-2013, 08:10 PM   #31
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Hmm thanks ill pull my paper work from Jan and see what latest software was and check, then post results...

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      04-30-2013, 07:33 AM   #32
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Hmm thanks ill pull my paper work from Jan and see what latest software was and check, then post results...

MrD
+1!

Very interested to know also and hope nothing was changed ultimately!
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      04-30-2013, 07:59 AM   #33
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70 - 110 degrees celsius.

Car throws yellow warning of "overheating imminent" at 120 degrees celsius, throws red warning of "engine overheating" at 130 degrees celsius
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      04-30-2013, 08:19 AM   #34
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70 - 110 degrees celsius.

Car throws yellow warning of "overheating imminent" at 120 degrees celsius, throws red warning of "engine overheating" at 130 degrees celsius
Thanks!

Mine is definitely stuck in the cold higher output setting for some reason! Mostly sits between 77 and 84 Celsius, but the other day when paying careful attention to the temperatures, it did briefly spike to 99 Celsius for a few seconds and then down again! Very very odd!
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      04-30-2013, 08:52 AM   #35
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Quote:
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Thanks!

Mine is definitely stuck in the cold higher output setting for some reason! Mostly sits between 77 and 84 Celsius, but the other day when paying careful attention to the temperatures, it did briefly spike to 99 Celsius for a few seconds and then down again! Very very odd!
It fluctuates with whatever type of driving you're doing.

Usually (seemingly backwards) runs warmer at highway speeds, but runs cooler if you do a lot of city driving.

In winter, I just shoot for the car to get above 70 degrees C to be considered "at operating temperature" I have tracked my car several times, and the highest I've ever seen within normal range is 111 degrees C. I'd imagine anything much more than that is a sign that something is up.
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      05-01-2013, 09:27 AM   #36
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It looks like I did reset latest software or firmware from what I made out of the paperwork. But it seems like they wouldn't allow that?
Then again its a hidden code function that us owners shouldn't know about...

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      05-01-2013, 09:57 AM   #37
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How did you activate the system reset? which section were you in?

(yes i know about the hidden menu, I'm asking about which of the 20 something sections did you go to to reset the software)
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