you dont
do you have to reset computer after changing battery in 2003 745li
yes it does
With a scan tool, or unhook the battery for 5 minutes
Disconnect your battery. Yup..It's that simple.
Disconnect your battery for over 1 hr and plug it back in.
diconnect the battery for 2 minutes
Unhooking the battery will clear the short term memory in the computer. Simply unhooking the battery should not do anything that requires any other reset.
Unhooking the battery for about 20 minutes should be more than enough to resed the computer.
One option to reset is to disconnect the positive (+) battery cale on the battery for 3 minutes. Then reconnect it , this will reboot the computer and the light. SORRY: It doesnt work on the Nissan 2003 350z to do this.
To reset the computer in a 2003 Cadillac Seville SLS, first disconnect the negative battery cable and leave it disconnected for about 10-15 minutes. This will allow the vehicle's computer to clear any stored error codes. After the waiting period, reconnect the negative battery cable and start the engine. This process should reset the computer and clear any diagnostic trouble codes.
remove negative and positive cables from battery, touch cables together for 30 seconds and then reconnect.....will be reset.
Check out the realted link for some advice on how to reset the computer in your 2003 BMW 325I computer.