Xdrive disabled when tire pressure sensor low

dzid_ · 03-14-2016, 04:12 PM

This is just informative post, so if there is more people like me who could not figure out why front wheels are not engaging.

You can correct me if I am wrong but from my experience:
X-drive system does not engage AWD when tire pressure is low.

It makes sense since wheel circumference can potentially change a lot when tire is flat. Locked transfer box would try to make front and rear rotate with the same speed which would be bad.

I just wonder how many people with broken sensor are driving rear wheel drive only.
On the other hand, if someone wish to try RWD only, they could try to somehow disable TPMS, without having much side effects of pulling out fuses.

This video doesn't prove anything. I should have recorded it with low pressure.

Antetokounmpo · 03-15-2016, 01:11 PM

I can for sure say when tpms is inactive it still works. Not sure about low. My summers don't have sensors and xdrive is definitely enabled.

gtaccord · 03-17-2016, 08:00 PM

As Heel Toe said xdrive still works when no sensors at all are installed. My winters don't have tpms installed and I definitely still have awd.

Misterp214 · 03-18-2016, 03:22 AM

I believe this is false. I didn't have sensor on my car for the longest. Still awd. Maybe there's something else causing this.

03-14-2016, 04:12 PM	#1
dzid_ Enlisted Member 6 Rep 38 Posts Drives: 135i 2011 DCT Join Date: Mar 2016 Location: Mi iTrader: (0)	Xdrive disabled when tire pressure sensor low This is just informative post, so if there is more people like me who could not figure out why front wheels are not engaging. You can correct me if I am wrong but from my experience: X-drive system does not engage AWD when tire pressure is low. It makes sense since wheel circumference can potentially change a lot when tire is flat. Locked transfer box would try to make front and rear rotate with the same speed which would be bad. I just wonder how many people with broken sensor are driving rear wheel drive only. On the other hand, if someone wish to try RWD only, they could try to somehow disable TPMS, without having much side effects of pulling out fuses. This video doesn't prove anything. I should have recorded it with low pressure. Last edited by dzid_; 03-17-2016 at 09:12 PM..
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03-15-2016, 01:11 PM	#2
Antetokounmpo Brigadier General 1550 Rep 3,475 Posts Drives: E90 6MT FBO; '18 F150 Platinum Join Date: Jul 2013 Location: WI iTrader: (3) Garage List 2018 Ford F-150 Pla ... [0.00] 2008 BMW 335xi [0.00]	I can for sure say when tpms is inactive it still works. Not sure about low. My summers don't have sensors and xdrive is definitely enabled. __________________ 2008 335xi 6MT \| VRSF Catless DP \| VRSF 7" FMIC \| VRSF CP \| TIAL BOV \| DCI \| MHD 2+ BC Racing BR \| Stoptech 600 \| Firehawk Indy 500 255 Square \| Atric Altimax 225 Sq. 2018 F-150 Platinum 701A \| FX4 \| 3.5 EcoBeast
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03-17-2016, 08:00 PM	#3
gtaccord Major 56 Rep 1,464 Posts Drives: 2009 BMW 335xi Join Date: Feb 2012 Location: Maryland iTrader: (7) Garage List 2009 BMW 335i xdrive [0.00]	As Heel Toe said xdrive still works when no sensors at all are installed. My winters don't have tpms installed and I definitely still have awd.
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03-18-2016, 03:22 AM	#4
Misterp214 Private First Class 19 Rep 165 Posts Drives: 2010 328xi sedan Join Date: May 2015 Location: Dallas Texas iTrader: (0)	I believe this is false. I didn't have sensor on my car for the longest. Still awd. Maybe there's something else causing this.
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