Part number 357972252 identifies a genuine Volkswagen electrical connector housing (specifically a 2-pin female housing). It is used to connect various electrical components within the engine bay and interior wiring harness.

Volkswagen Golf    1992 – 1999    MK3
Volkswagen Jetta    1993 – 1999    MK3
Volkswagen Passat    1990 – 1997    B3 / B4
Volkswagen EuroVan    1992 – 2003    T4
Volkswagen Corrado    1990 – 1995    N/A

Common Applications
Fuel Injectors: Often used for the individual injectors on 4-cylinder and VR6 engines.
Sensors: Frequently found on the Coolant Temperature Sensor (older black/blue 2-pin style) or the Knock Sensor.
Switches: Used for the Back-Up (Reverse) Light Switch on many manual transmissions.

(TOP SHELF OF MK3 STUFF)