I'm having a problem with the manual trunk release in my 04 4-door Mazda 3. There is still tension in the cable, but it won't release the trunk. It opens fine with the key, so I'm assuming the cable is just stretched. Surprisingly, the part is relatively cheap, so I am planning on just replacing it myself. Has anyone had this problem or know of any potential difficulties? It seems like it should be fairly straightforward. Thanks