i have an 06 325i also and went from 17s to 18s w/o a TPS error code...
anyway, there are instructions on how to reset it in the owner's manual.
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SG e90 | Black Dakota Leather | ZPP | ZSP | 19" BBS LM Reps | Steptronic
iDrive | Aluminum Trim | Xenon | CF Roundels | 15% Tint
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