Brake fluid, fuel injector and cooling system flush

Brake fluid service -- industry standard for replacing the fluid is about 3 years. It is not mileage based, because it gets replaced for moisture build up in the fluid, which is not driving dependent. Fuel injector service -- there's a fine line between "need" verses "recommend". I'm guessing it's "recommend" since you don't have a failure you are sharing with us. I would suggest YES on the brake fluid exchange, and NO on the injector service - if you have no fuel system problems.