Genuine BMW part 61 21 8 363 904: Impact-resistant empty battery. The number stamped on the part is 61218363904; BMW's catalog files it under the short number 8363904. You will find it on our Electrical shelf, under Battery with holder. It supersedes the older number 8360624, so a part carrying that number is the same part. BMW has since replaced it with 8381742.
It fits the E36 convertible (318i, 323i, 325i, 328i and M3, 1994–1999), with the M43, M50, M52 or S50 engines — and the European-market versions.
BMW draws it on the Battery (61_0095) diagram. It weighs about 15 kg (33 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.