I am literally doing every mantance item on this Toyota Prius before the drive to Alaska, the fuel injectors were one of the many items.
All I can verbally say is “Wow, I am glad I changed them on a car that has almost 180,000 miles”!
Look at the old injectors and how dirty they are, if you are wondering, the injectors are what squirts gas into your car. If they are dirty your MPG will be horrible. When you put fuel system cleaner in your car, the injectors are one of the major parts the cleaner helps.
If your Toyota Prius has over 150,000 miles, I suggest you have your Fuel Injectors replaced. The process was easy and I purchased them from eBay. Twice… The first set flew off my car, don’t ask…