This is a genuine BMW lead seal for Service (red), part number 61 13 8 378 461. The number stamped on the part is 61138378461; BMW's catalog files it under the short number 8378461. You will find it on our Electrical shelf, under Plug connection, terminal. It supersedes the older number 0304740, so a part carrying that number is the same part.
It fits every E46 body style (320i, 323i and 325i, 1999–2006), with the M52, M54 or M56 engines — and the European-market versions.
BMW draws it on 6 diagrams, among them Battery cable 2nd battery/E-Cat (12_1041) and Battery Cable (12_1353). It weighs about 1 g (under 0.1 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.
