The sealing rings are synthetic resin with chamfered ends. Check the condition of the sealing rings, and replace them only if they are worn, distorted, or damaged.
For a better fit, squeeze sealing rings together slightly before installing them.

Apply ATF to the new sealing rings, then install them on the secondary shaft.

After installing the sealing rings, verify the following:
The rings are fully seated in the groove.
The rings are not twisted.
The chamfered ends of the rings are properly joined.
Brake Booster Replacement
Remove the air cleaner cover and the air cleaner case.
Remove the master cylinder.
Disconnect the brake booster vacuum hose (A) from the brake booster.
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Installation (Part -3)
Remove the vinyl tape from the connectors.
Connect the EPS motor angle sensor 8P connector (A), torque sensor 6P connector (B) to the steering gearbox.
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Map Display Commands
Display current location (shows current
latitude, longitude, and elevation)
Display/Hide (specify icon type):
ATM
gas station
restaurant
post office
grocery store
lodging (hotel, motel)
parki ...