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.
Instrument Panel
* : If equipped ...
Driver's Airbag Replacement
NOTE:
If replacing the driver's airbag after deployment, refer to
Component Replacement/Inspection After Deployment for a
complete list of other parts that must also be replaced.
...
Throttle Body Cleaning
caution
Do not insert your fingers into the installed throttle body when you
turn the ignition switch to ON (II) or while the ignition switch is in
ON (II). If you d ...