This small 2-pin connector is used on the K-series engine for temperature sensors (blue sensor, brown sensor and long S2 sensor) and for the pressure switches.

Unfortunately, over time we've seen quite a few of these connectors starting to fail for several reasons.

Here is a simple kit, the connector housing, a sleeve with a cable tie to close the sleeve and two actual connection pins. All you need to do is strip the wires, shrink the connectors to the wires and push them in the right position in the plastic housing.