THIS TRUNK LATCH FITS 1999-2003 TOYOTA SIENNA'S THAT DO NOT COME EQUIPPED WITH POWER TAILGATE OR A SECURITY SYSTEM. IF YOUR VAN HAS A SECURITY SYSTEM THEN THIS IS THE WRONG LOCK. IF YOU ARE UNSURE YOU CAN CALL YOUR DEALER AND GIVE THEM THE VIN NUMBER. THE EASIEST WAY TO TELL IS TO SEE HOW MANY WIRES GO INTO YOUR TRUNK LATCH. IF YOU SEE 2 BLUE WIRES GOING INTO YOUR TRUNK LATCH THIS IS THE CORRECT LOCK. IF YOU SEE 4 BLUE WIRES THEN THIS IS NOT THE CORRECT PART.