Sandy and Shirley: Check this out: https://www.etrailer.com/partlist/Fo...king%20Systems
It says it's the 20 most popular braking systems that ETrailers sells for use on a Ford Focus. Not sure of it's validity, but ETrailer is usually trustworthy. I have an Invisibrake by Roadmaster and love it, but I'm not sure if it will work with your braking system. In reading, they say it will work with your vehicle if you have an ELECTRIC hydroboost braking system but will not work if your brakes get their boost from the power steering pump. The Invisibrake has a separate power wire that hooks to the toad battery so it has power for breakaway action. It also gets power from coach (turn on your lights while towing) to trickle charge the battery. When the unit gets a signal from the coach brake lights, it activates an air compressor that operates a strut to pull the brake pedal via cables and it activates a vacuum pump that provides boost to the braking system. If the break away cable is pulled, the system activates automatically. If it will work for you, I love mine. Stays in place and you never even know it's there.