# Notes for remove and install ABS hydraulic unit

The hydraulic unit must always be exchanged as a complete unit

Bolts or screws marked X on the hydraulic unit must never be loosened or tightened

Whenever brake lines are detached, the fittings on the hydraulic unit and the open ends of the brake lines must be plugged immediately to prevent dirt from entering.

If the brake lines have been detached and attached several times, check that the fittings are still free from leaks, renew the brake lines if necessary.

E30 M3 Repair Manual V2.7. Copyright ©1999-2001 Koala Motorsport & Brett Anderson