Bmw 318i 2001 model just stopped while driving

Have you checked the dash dimmer switch to see if it's on fully?

Did you replace the spark plugs with the same brand recommended by ? Might also what to go over all the wiring harnesses, you disconnected when replacing the exhaust. Might of pinched a wire.

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BMW 318 318i 1992 1998 Repair Service Manual PDF

Get the air flow meter checked.

THE GUIBO IS ABOUT TO LET LOOSE

Possible broken motor mount or torque strut. Your engine is probably rocking too far when it is put into gear. The torque strut will prevent that. The rubber bushing n the strut is probably bad.

Have you checked the Angle Sensor

Check your Other Post....

i see answers to other questions here except the question asked about no heat in a 325 xi 2001 blower works great fluid is full no leaks,fuses are fine,get a lil heat while at a stand still but as soon as you drive cold air only temp on max 91, engine temp right in the middle takes about 8 mins for temp gauge to reach the middle can anyone help with this..PLEASE !!!!!!

You need to make sure you have a good drive belt and verify that the tension is working,if all seems normal then get the alternator or the wiring to it tested.

I would have the battery tested. When they get cold they get weak. Next I would look at the wires on the starter to see if their loose.