From Z4UM.com (Full Thread)
I actually saw the production schedule for all BMW vehicles for 2005 and 2006 (not a photocopy or some random notes, but official from BMW). I was unaware of this, but apparently BMW will replace the 745 with a 750, and the 545 with a 550. The two new models will go into production in March 2005 and September 2005 respectively. In addition, the new 3-series will go into production in March of this year and will not have a 2.5 liter engine anymore. Instead the car will have a 220hp 3.0 and a 260hp 3.0. The lower rated engine will go in the 325i while the other will go in the 330i. The Z4 M roadster will go into production in January of 2006 along with another Z4 3.0si. The manager had no idea as to what engine will be fitted in the M roadster, but the production dates are final.
I actually saw the production schedule for all BMW vehicles for 2005 and 2006 (not a photocopy or some random notes, but official from BMW). I was unaware of this, but apparently BMW will replace the 745 with a 750, and the 545 with a 550. The two new models will go into production in March 2005 and September 2005 respectively. In addition, the new 3-series will go into production in March of this year and will not have a 2.5 liter engine anymore. Instead the car will have a 220hp 3.0 and a 260hp 3.0. The lower rated engine will go in the 325i while the other will go in the 330i. The Z4 M roadster will go into production in January of 2006 along with another Z4 3.0si. The manager had no idea as to what engine will be fitted in the M roadster, but the production dates are final.