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BMW Steering Rack Tag
If you are trying to do some research on your BMW Steering rack you many need to get the tag number. Almost all have a tag on them from the manufacturer.
Most BMW Steering racks are made by a company called ZF out of Germany. There will be a ZF tag on the steering rack that will have a BMW part number and the ZF 10 digit part number.
7852955272 is a rack for 98 BMW 528. The numbers break down like this. 78 = steering rack, because ZF makes lots of parts.(80 is steering box) 52 is a series number, so this is 7852 series. 955 means standard rack. If it was 991 it would be Servotronic rack. 272 is the model number in the 7852 series.
Getting the exact ZF number will always ensure you get the correct rack, but do know that many of them interchange. In this case 7852974568 and 7852955278 is the same rack, just different productions of it, so they would fit in just fine.