If it is original, take the lock cyl out of the passanger side door and there will be a code stamped into the HOUSING. Take this code to either the dealership or a good locksmith and have a key cut to the original specs. Then take the lock cyl out and have a lock smith rebuild it with new pins and springs and this should make the cyl like new. If the housing is too worn, buy one from a parts store and have the locksmith re-key it to the code cut key. It never hurts to rebuild the drivers door cyl at they same time because they are the first 2 to wear out and make it easy for thieves to take our vehicles. FYI I work for a Toyota dealership and do this on a regular basis. The cutting of the key may be a little on the pricey side but like a master key don't use this one and wear it out. Keep it as a spaire and cut the ones you use, and wear out, at wal-mart. A good lock smith in the Fresno area that can do all this is Advanced Lock and Safe (559)779-5760. One man company and is always busy but highly recommended.
