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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 04-24-2012, 05:43 PM   #1
B4MC1S
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Question How does the TPMS on E46 M3 work?

I recently installed new rims. And my TPMS light is going off. I have searched countless post, but it does not answer my question. Are the TPMS for 2004 E46 M3 direct or indirect? Meaning is the sensor installed inside the wheel or is it based of the ABS. Also if it is not indirect, that means I will have to install new sensors on the new rims, right? Any help is appreciated.

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Old 01-20-2013, 01:55 PM   #2
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All years M3 the sensors were based on dsc/abs/wheel speed-spin sensor. This meant that changing your rims (IE getting bigger rims) would change the way the system is reading the wheels.

Any change in rotational speeds and is senses like you got a flat tire.
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Old 01-20-2013, 05:16 PM   #3
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Outer diameter of all wheels must match original or else flat tire warnings will trigger.

Now I thought that if you hold down the tire warning button, shouldn't it reset and adapt to the new tire spec?
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Old 01-20-2013, 05:48 PM   #4
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Look up the procedure to reset it. I can't quite remember how it's done. The light will go away. Don't worry.
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Old 01-20-2013, 06:28 PM   #5
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Originally Posted by wildpig View Post
Outer diameter of all wheels must match original or else flat tire warnings will trigger.

Now I thought that if you hold down the tire warning button, shouldn't it reset and adapt to the new tire spec?

1. No

2. No

3. Read you manual.






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Old 01-20-2013, 06:34 PM   #6
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I resolved the issue a while back. If you have the RED warning sign, press down the tire warning button to make it go away. But if you want your vehicle to recognize new wheels, press the tire warning button once so it lights up YELLOW. And drive your vehicle around while it's YELLOW and the YELLOW indicator will go away once vehicle recognizes your new setup.
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Old 01-20-2013, 06:36 PM   #7
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Originally Posted by B4MC1S View Post
I resolved the issue a while back. If you have the RED warning sign, press down the tire warning button to make it go away. But if you want your vehicle to recognize new wheels, press the tire warning button once so it lights up YELLOW. And drive your vehicle around while it's YELLOW and the YELLOW indicator will go away once vehicle recognizes your new setup.

Thats interesting - but it is not the re-learn new diameters procedure.
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Old 01-20-2013, 06:48 PM   #8
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Thats interesting - but it is not the re-learn new diameters procedure.
I am not sure of any other methods of re-learning new diameters, but I followed the procedure mentioned in the manual:

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