How can I get a duplicate key for Mitsubishi endeavor?
You can buy it at the dealer about $100 i think...
Or buy a blank Mitsubishi endeavor key (Transponder) about $20.00 from the internet and have it cut (copy the original) at ace hardware and program the key yourself. Instruction to program is somewhere else here at answers.com
Be sure you have two original transponder keys before you buy so you can program it to your car. If only one...you have no choice bu go to the dealer.