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E90 320D SE tyre presure sensors ?

BMW forum 3 series car: E21, E30, E36, E46, E90, E91, E92, E93, F30, F31, F34, F35

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E90 320D SE tyre presure sensors ?

Postby Rickster7 » Sun, 27 Sep 2009 20:17:03 UTC

is there a link of any info on this subject .Im running bridgestone s 205/55R/16 33 psi sensor comes on

Also on the same car between 80/90 mph i can hear a whining noise of wind rushing over something . windows all up doors closed properly
any ideas please ? cheer s
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Postby tipper » Sun, 27 Sep 2009 20:39:18 UTC

There are no tyre pressure sensors.

On the E90/91 the TPMS works on monitoring the rolling diameter of the tyres via the ABS sensors and ABS computer so if a tyre drops pressure its rolling diameter changes in comparison to the others and the TPMS alarms.

You need to check all tyre pressures and then reset the TPMS. Have a look in the handbook to see how to do it. :)
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Thank s

Postby Rickster7 » Mon, 28 Sep 2009 17:22:23 UTC

I shall look into that . many thanks
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Re: E90 320D SE tyre presure sensors ?

Postby Es-Jet » Mon, 28 Sep 2009 20:18:27 UTC

Rickster7 wrote: Also on the same car between 80/90 mph i can hear a whining noise of wind rushing over something . windows all up doors closed properly
any ideas please ? cheer s


I've had this on both my E90's. My pre-facelift was worse than my current car. Not sure where it's coming from, but I'm guessing it's air flowing around the door mirrors maybe?
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Postby Tippo » Mon, 28 Sep 2009 20:59:00 UTC

Sorry for going slightly off topic here but what psi is everyone running on with 320d SE run flats btw?

Got the standard 16s and noted the sticker says 210 but know that some people put more air in for a better ride. My preasures were different in each tyre after picking the car up from the dealer today.

Thanks
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Postby tipper » Mon, 28 Sep 2009 22:39:51 UTC

Someone on here recommended +0.2 bar front and back. The basis of this is to reduce tramlining. I have done this but not sure it helps, it does reduce front tyre shoulder wear though but also increases thump/bump.. :)

The RFTs remind me of driving on cross ply tyres.....remember those?........... oops, showing my age there, ah the good old days........! :shock:

Don't forget to reset the TPMS as per the handbook when you have got the TPs where you want them to be.

There's also a lot of talk about the cost of RFTs. I got 4 Continentals for £90 each from ATS recently (for 16" SE wheels).
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Postby Tippo » Tue, 29 Sep 2009 12:09:16 UTC

Thanks Tipper, mine were way too overflated, put them back to 31/34 and see how it goes, reset the TPM too.

The UK roads don't help either, glad at least I don't have Sports suspension and I can live with the road noise tbh so I have no real issues with mine.

£90 for a big brand tyre is not too bad either, my last car liked the Michellin Pilots and they were about £120-140 each. :shock:
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Postby Peter » Tue, 29 Sep 2009 12:27:43 UTC

The +0.2bar increase on front RFTs does certainly reduce the odd wear on the front edges. The lower profiles (17/18" wheels) also benefit from increased pressure to reduce tramlining tendencies.

Don't try and run low pressures for a better ride quality, particularly if you do lots of short trips, (by that I mean less than 10 - 15 miles), as the tyres don't warm enough to reach the working pressure, therefore more odd wear will occur. Down side, they are harder to run on cold, with increased pressure, you do feel more road disturbances. Hot running is much better.

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Postby agh » Tue, 29 Sep 2009 13:03:35 UTC

I've found +0.2 bar helps with tramlining and possibly ride but... the temperatures have dropped recently and I'm getting tramlining again even with these higher pressures.
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