Identify this Diff

[dannosail]

I removed this diff from a South African 325i Auto Saloon. The only numbers I can make out clearly are 1210 411 - part number but I can't find it on RealOEM. I can also make out 5638 or 5G38 Any body help please?

[Brianmoooore]

I think these are all just casting numbers. The numbers you need are on a 2" long tag, fitted under one of the back cover bolts.
If the tag is missing, you'll have to count how many turns of the input shaft are needed for one turn of an output shaft.

[dannosail]

Thanks Brian, I'll have a squiz in the morning.