Where is the coolant temperature switch on a Ford Focus zetec engine?

The coolant temperature switch location on a Ford Focus Zetec engine varies slightly depending on the specific year and engine code. It's generally found on the cylinder head, near the thermostat housing. However, it's not always in the same exact spot.

To locate it precisely, you'll need to:

1. Consult your car's repair manual: This is the most accurate way. The manual will show you a diagram and the precise location.

2. Use a Ford Focus Zetec engine diagram: Online resources (like repair manuals websites or forums dedicated to Ford Focus) often have diagrams showing engine components. Searching for "[your year] Ford Focus Zetec engine diagram" will yield results. Look for the coolant temperature sensor (or switch – they are often used interchangeably).

3. Visual inspection: With the engine cool (crucial for safety!), carefully inspect the cylinder head around the thermostat housing. The switch is usually a small sensor with one or more wires connected to it. It might be slightly recessed into the cylinder head.

Important Safety Note: Never attempt to work on a hot engine. Allow it to cool completely before performing any inspection or repair.