This is a genuine BMW battery cable (plus pole), part number 61 13 6 908 500. The number stamped on the part is 61136908500; BMW's catalog files it under the short number 6908500. You will find it on our Electrical shelf, under Plug connection, terminal.
It fits the E46 sedan, coupe and touring (316i, 316i 1.6, 316i 1.9 and 318i, 1998–2004), with the M43, N40, N42 or N46 engines.
BMW draws it on the Battery Cable(battery Front) (61_1107) diagram. It weighs about 490 g (1.1 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.