Quote:
Originally Posted by itscoo2pyopants
I didn't think that e53's had tpms sensors? Mine doesn't. I remember reading some where that it calculates wheel speed, and when one is off it throws the error. That's the way it was in my e46 as well.
Are you resetting it correctly? Make sure psi is the same, key in the on position, etc?
The only other way I know how to disable the system is to have it recoded. I paid a local guy to turn it off on my e92.
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The LCI models (2004 onwards) don't have a physical TP sensors - as stated they use wheel rotational data to detect a low tire pressure condition.
Pre-face lift, a full TPMS system , with a sensor in each wheel, transmitting at 433MHZ (in the USA at any rate), was an option. A 2003 4.6i (esp. pre 10/03) could well have been ordered with the full TPMS package.
A missing sensor would likely be an issue for the system, as has been suggested by the OP.