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post #334 of (permalink) Old 13th June 2008
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Originally Posted by mike1999 View Post

I had a tyre replaced in January this year (rear O/S). Now have the tyre deflating - on local roads takes about 7 to 12 days to give a low pressure warning.

On a motorway takes 20Mins at a steady 70MPH.

I have had the dealer take the wheel to find leak, and watched no bubbles from submerged tyre for 20 minutes. Any ideas (leaking valve under vibration??).

I have never known a tyre deflate in this manner. I would suspect the valve, the cores tend to sieze up. It could be the core is yours is partially seized, causing it to leak sometimes.
I would suggest changing the sensor valve for a normal one. If the leak is cured then you know its the valve at fault. Then you would have to decide if you want to get a new sensor or disale the warning light.
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