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Message: <blockquote data-quote="tkw" data-source="post: 284844" data-attributes="member: 830">If you find transducers on the rims (they are mounted behind the air valve) then this should be the later generation of TPMS which rightfully, an E90 should have. The one that works by using the ABS sensors belonged to the earlier generation like my Z4 (2005). You need to let the car 're-learn' the tyre pressure each and everytime after refilling air. I don't know how the E90's works but mine is like, start the engine, press the TPMS button until a light comes on the dash and proceed to drive normally. It goes off after 1 minute or less, indicating it has 'remember' the new pressure setting on the wheels.  Read the manual carefully, it should tell you what to do! It is also very true that extra care is needed to remove or reinstall tyres on rims fitted with transducers.  Don't you marvel at modern technology!?<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite11" alt=":rolleyes:" title="Roll Eyes    :rolleyes:" loading="lazy" data-shortname=":rolleyes:" /></blockquote>