For an older Isuzu Trooper model (such as those produced before 2000), the cost of having a locksmith make a new ignition key can range from approximately $75 to $150. This includes the labor and materials necessary to create a new key that will work with your vehicle's ignition system.
For a newer Isuzu Trooper model (such as those produced after 2000), the cost may be higher due to the potential need for specialized equipment and programming. In this case, the cost of making a new ignition key could range from $150 to $300 or more.
It's important to note that this is just an estimate based on common rates and does not account for regional differences or variations in locksmith pricing. To get the most accurate quote, it's best to contact a reputable locksmith in your area and provide them with the specific details of your vehicle and your ignition key problem.