For E46 (non-M3) owners to go to the track or autocross, some may have encountered fuel starvation issues when the gas tank gets below as much as 3/4 full.

In the E46 M3, BMW installed a "fuel baffle fixture" into the gas tank, to prevent fuel starvation under severe g-loads with sloshing fuel.  This part is inexpensive and fits perfectly into non-M3 fuel tanks with no modifications.

BMW # 16 11 2 229 656        Retail Price:  $16.10

This plastic baffle is more like a small "fuel pocket" which holds a small volume of fuel, but apparently enough to continue supply to the fuel pump when the tank gets low. Of course, this is until the fuel levels out again from the excessive movement.

Installation does require removal of the fuel pump (passenger side of the rear seat) for access.

Added by Ben Liaw, December 13, 2003