A. Inspect Master Cylinder Code

1. Inspect the front surface of the master cylinder for a bottom code of 3895 as shown in figure 1 (the letter code is not important for this service).

Note:
ABS brake systems have TWO master cylinder brake tubes

If the master cylinder has a code of 3895, replace the primary piston as instructed in section "B" (verify that the vehicle has not already been repaired by using DIAL System Function 70 or VIP). If the master cylinder has any other bottom code piston replacement is not required. Proceed to section "C". Install HCU Reinforcement Plate and Inject Grease.