Toyota Highlander Service Manual: Power steering system

Power steering

...

Precaution

1. HANDLING PRECAUTIONS FOR STEERING SYSTEM (a) Care must be taken when replacing parts. Incorrect replacement could affect the performance of the steering system and result in a driving hazard. ...

More about Toyota Highlander:

Hitch
Trailer hitch assemblies have different weight capacities. Toyota recommends the use of toyota hitch/bracket for your vehicle. For details, contact your toyota dealer.  If you wish to install a trailer hitch, contact your toyota dealer.  Use only a hitch that conforms to the gro ...