Originally Posted by John_01
Your air pressure is low. Especially the front. I'd recommend around 34 to 38PSI. There are many possibilities for where the air can leak. The most common is just your normal puncture / slow leak. A decent tyre shop should be able to sort it out.
I'm running oem 19s on my 335i e93. The door says 37 for the fronts and 41 for the rears but this spec is for no luggage and runflats for e93 335i M sport. If i had an e92 with 19s, id pump the rears as same as the fronts. Try 38 all round. Should be sweet and your tyres will wear out evenly and last longer.