BMW - 03 3.0 Puncture warning - run-flat tyre

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Mon 20 Jul 2009 18:46
03 3.0 Puncture warning - run-flat tyre - Andrew-T
Yesterday daughter and SiL were approaching Bicester when their Puncture warning was activated. They visited the nearest K-F centre who found no fault with any wheel (thereby claiming to have saved them loads o'money). I checked all 4 tyres when they returned here - 37psi all round.

What sensing system does BMW use, and what event might have triggered the false warning?
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Mon 20 Jul 2009 23:25
03 3.0 Puncture warning - run-flat tyre - elekie&a/c doctor
The tyre deflation system on these works through the abs/esp control unit.It monitors the rolling circumference of each wheel which alters as tyre pressure decreases, via the wheel speed sensors.As to what caused the w/light to come on may be a one-off glitch but if continues to be a problem then a diag test of the system may show a fault.hth
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Mon 20 Jul 2009 23:45
03 3.0 Puncture warning - run-flat tyre - topbloke
i assume that they have not had a new tyre fitted recently, i only ask as when a new tyre/tyres are fitted the "system" has to relearn the rolling radius and has to be put into this mode (as used in the vauxhall system) bmw may be different !, Regards TB
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Tue 21 Jul 2009 12:36
03 3.0 Puncture warning - run-flat tyre - Andrew-T
Forgot to mention that the Puncture was reported during heavy rain - might that have something to do with it? If so, it could happen quite often?
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Tue 21 Jul 2009 13:26
03 3.0 Puncture warning - run-flat tyre - Collos25
As far as I know they have a tiny transmitter in the sensor which goes to a receiver I not sure whether they have one front another in the rear.There is no simple way to test them without plugging into the diagnostic machine ,the wheel sensor is very expensive and the control unit is a visit to the bank manager.
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Tue 21 Jul 2009 14:06
03 3.0 Puncture warning - run-flat tyre - sparky93
You said heavy rain, perhaps you/her went into a big puddle and aquaplaned a little.....
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Tue 21 Jul 2009 16:10
03 3.0 Puncture warning - run-flat tyre - Andrew-T
Perhaps you/she went into a big puddle and aquaplaned a little.....


Exactly. I wasn't there, so I am just relating what I was told. But if that was the cause, I would expect it to happen to lots of drivers?

And fixing any problem would be £££, by definition. SiL read the handbook and reset the indicators. Modern cars try to be too clever IMHO.

Edited by Andrew-T on 21/07/2009 at 16:10

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