What does a 2002 ford focus engine coolant bypass hose look like?

The 2002 Ford Focus engine coolant bypass hose doesn't have one single, easily definable look. It's a relatively short, flexible rubber hose, usually black, connecting parts of the cooling system. Its exact appearance (length, diameter, routing) will depend slightly on the specific engine (Zetec or Duratec) in your Focus.

To identify it visually, you'll need to locate it within the engine bay. It's typically found near the thermostat housing and connects to either the engine block or the thermostat housing itself, often forming a small loop or bypass. It's a relatively small diameter hose compared to the larger radiator hoses.

Without a picture of your specific engine bay, it's impossible to give you a precise visual description. However, searching online for "2002 Ford Focus coolant bypass hose" alongside images of your specific engine will likely yield the best results for visual identification. A repair manual for your specific year and engine would also show you its exact location and appearance.