Do I need fasteners to install this handle?

The handle mounts at factory attachment points, but fastener specs aren't confirmed with this assembly. Check your vehicle's service manual or test-fit before committing to hardware size and type.

Will this handle work on both sides of the vehicle?

This is engineered specifically for rear right door mounting. You'll need the corresponding left-side handle for the opposite door.

Does this come ready to install, or does it need prep?

The handle ships ready to mount. No painting or surface prep is required before installation.