If its anything like a 325e you will find it in the glove box.
Open the glove box look for two BLACK screws remove them, reach back and remove two fixing plastic bolts by twisting them 90 degrees, remove the plastic cover and the ECM should be there held in with 4 10mm bolts.
Disconnect the battery before unplugging the ECM
The front oxygen sensor is located on the exhaust manifold of the BMW 318ti. The rear oxygen sensor is located in the head pipe.
behind the battery
Chain
no dipstick.
169 miles per hour
Don't know about the E46, but my 97/98 318ti locks and unlocks with the central locking.
routing diagram BMW 3 series serpentine belt
On my 1998 US Model 318ti, the battery is located under the hood, on the right side, against the firewall, in a plastic battery box. See the related link for a photo of the engine bay, with the battery box top removed.
Yes. The 318ti was a two door hatchback.
The BMW 318 has only one belt. All of the components of the engine are driven by a single serpentine belt.
3 or 300
A BMW 318ti should have a 12V 55Ah CCA (SAE) 450A fitted if it's an E36 model