Fuel Inertia Switch

The fuel inertia cutoff switch is an electrical switch which cuts the circuit when subject to sufficient acceleration forces. This is a safety feature to sure that the fuel pump is switched off in the event of a crash, particularly in a rollover accident.

While the Westfield loom includes a connector for the fuel inertia switch (positioned next to the fuel pump behind the differential), it is blanked off by default and is an optional component.

A fuel inertia switch is not an IVA requirement.

Some users have experienced unexpected activations of the inertia switch during normal or track day driving, due to the lack of a purpose-built inertia switch for the weight and dynamic performance of Westfields and similar cars. As a result, most builders do not fit the inertia switch.