If your 2008 2.5 car is experiencing a problem where it won't accelerate over 25mph, it could be caused by a faulty brake relay. To locate the brake relay, you should consult your car's owner manual, which should have a diagram of the car's various components and their locations.
Alternatively, you could also consult with a certified mechanic or take your car to a dealership for inspection and repair. It's important to address this issue promptly, as it can be dangerous when your car won't accelerate as quickly as needed in certain driving situations.
Ignoring the issue could lead to accidents, so it's important to get it fixed as soon as possible. Once the brake relay is identified as the problem, it can be replaced by a professional, and your car should resume normal operation.
All the best