The battery is located on the right side of the vehicle in the trunk. To view it, remove the right side panel where the factory tools are kept. Simply turn the black knob and pop out the plastic insert. Once you have exposed the battery, you will need a screwdriver and socket wrench to remove the arm bar and the battery terminals. Remove the negative terminal first. If you have navigation, your best bet is to have a certified tech do it for you. The computer has to be reprogramed after installation. After serious consideration, I decided not to replace the battery myself.
In the trunk.
there is no dipstick
For your 2006 BMW 330I: Wheel Stud Torque 72-87 Foot pounds (Final torque)
in the trunk, on the right side
In the boot (trunk for the Americans reading)
If your 330i is a 2006 model or newer, it does not have an oil dipstick. Otherwise, check the oil dipstick for oil level.
BMW 330i with the sport pack
no alarm installed
With out performance and power enhancing parts the BMW 330i has 235 horsepower!
Do you mean where is the battery in BMW 2006? Some BMW cars have battery in the Boot (trunk) and you have to lift the cover to see it
if it's not under the hood, you should check in the trunk under the carpet, probably in a corner.
REDLINE 5W-30 (NONE BETTER)