Code numbers for the steering Type:
Found on the identification plate in the engine room or at the B-Pillar; the lowest service number
the last digit:

1 for Koyo
2 for CamGear
3 for ZF

Volvo 740 - ZF
Volvo 760 - ZF
Volvo 940 - ZF
Volvo 960 - ZF
Volvo S90/V90 - ZF