There is no set period recommended by Toyota for body lubrication. However, it is a good idea to lubricate the following body points at least once a year, especially in the fall before cold weather.
Apply graphite lubricant sparingly thought the key slot. Insert the key and operate the lock several times to be sure that the lubricant is worked into the lock cylinder.
Spray a silicone lubricant or apply white lithium grease on the hinge pivot points to eliminate any binding conditions. Open and close the door several times to be sure that the lubricant is evenly and thoroughly distributed. When applying grease, the use of a small acid brush is very helpful in getting the grease to those hard to reach areas.
Spray a silicone lubricant on all of the pivot and friction surfaces to eliminate any squeaks or binds. Work the tailgate to distribute the lubricant
Be sure that the drain holes in the doors and rocker panels are cleared of obstruction. A small screwdriver can be used to clear them of any debris.
The Toyota Previa models are equipped with sealed bearing assemblies. The bearing assemblies are nonserviceable. If the assembly is damaged, the complete unit must be replaced. Refer to Section 8 for the bearing removal and installation procedure.
Your vehicle was primarily designed to carry passengers and cargo. It is important to remember that towing a trailer will place additional loads on your vehicles engine, drivetrain, steering, braking and other systems. However, if you decide to tow a trailer, using the prior equipment is a must.
Local laws may require specific equipment such as trailer brakes or fender mounted mirrors. Check your local laws.