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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Tue, Oct-09-2018, 11:36:23 PM   #1
burningchrome
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Default TPMS woes

My TPMS light keeps coming on red every couple days. I'll check the tires, and the pressures are fine. I reset it, a couple days later, it's back. What sensor is failing?
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Old Tue, Oct-09-2018, 11:41:08 PM   #2
rbmwiv
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Default Re: TPMS woes

Possible your abs sensors are dirty. Pull them from each spindle and clean the build up off they are magnetic. The way the car determines if the pressure is low it uses the abs sensors because a tire with a higher pressure will have less overall revolutions than a tire thatís low on air. Thereís no sensors in the wheels on a e46.


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Old Tue, Oct-09-2018, 11:53:14 PM   #3
kokgo20
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Default Re: TPMS woes

Are you sure that you are resetting it correctly also?
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Old Wed, Oct-10-2018, 12:45:11 AM   #4
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Default Re: TPMS woes

New tires?

Which re-learn procedure are you using?
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Old Wed, Oct-10-2018, 02:12:44 AM   #5
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Default Re: TPMS woes

Mine acted up when I put new tires on the rear. I cleared it three or four times and it never came back. That was a month ago.

I hate our TPMS. Best addition I ever bought for my M3 is this solar power TPMS system for less than 50 bucks. I got the external sensors in the valve caps because I have a square set up and rotate my tires. All I have to do is swap valve stem caps. They are very water proof and holding up well.

Temperature and pressure read-outs seem amazingly accurate. Within a single PSI. I watch the temps rise as I drive and the resulting PSI increase.

I did not see (night time.very dark) one tire completely flat because of a nail I picked up. The alarm on the unit was sounding to alert me one of my tires was below 35psi (I set that value). It was 0 psi, actually. I patched it with a plug(worked 100%) and actually ended replacing both my rears a week later.

I see now that it is rated "Amazon's Choice" in TPMS $47.99



I recommend this tire pump. Just set the pressure and it has auto shut off. Love it. $36.77


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Old Wed, Oct-10-2018, 01:30:17 PM   #6
burningchrome
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Default Re: TPMS woes

Resetting by holding down the button until red goes off and yellow comes back on. If I turn the car on, red light still on, then move the car even a little, when I try to reset it will go yellow, then almost immediately red when I let go of the button.

This is following a track weekend and one new rear tire. The new tire has maybe 5k fewer miles on it; maybe the minuscule difference in diameter is causing it?

I'll clean the sensors.
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Old Wed, Oct-10-2018, 02:41:01 PM   #7
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Default Re: TPMS woes

mine was off for months, now its back on.. i just ignore it.. as others have said, our TPMS system is BS.
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Old Wed, Oct-10-2018, 02:59:16 PM   #8
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Default Re: TPMS woes

Quote:
Originally Posted by OneFastSicilian View Post
mine was off for months, now its back on.. i just ignore it.. as others have said, our TPMS system is BS.
Cut out a small square of 3M black electrical tape and cover the light. I found that 3M seems to leave the least residue and hold up best in heat, unless someone knows of a better tape.

I used to do this on oldy time VCRs that would flash every time the power would hiccup.
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Old Wed, Oct-10-2018, 03:11:42 PM   #9
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Default Re: TPMS woes

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Originally Posted by OneFastSicilian View Post
i just ignore it..
This highly offends my sense of organization. I drove around with a SES light for a year and it drove me crazy.
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Old Wed, Oct-10-2018, 04:35:29 PM   #10
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Default Re: TPMS woes

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Originally Posted by burningchrome View Post
Resetting by holding down the button until red goes off and yellow comes back on. If I turn the car on, red light still on, then move the car even a little, when I try to reset it will go yellow, then almost immediately red when I let go of the button.

This is following a track weekend and one new rear tire. The new tire has maybe 5k fewer miles on it; maybe the minuscule difference in diameter is causing it?

I'll clean the sensors.

Did you check/equalize the pressure in the new tire with the other rear? What is that pressure?

Did you do the full re-learn procedure in key position 2?

The fact that this follows a new tire installation suggests that you aren't doing the correct re-learn procedure.
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Discussing TPMS woes in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)