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a unit that controls turn signals and emergency flashers

A device that controls the flow of vacuum to the differential lock

A temperature-controlled switch located at the bottom of the radiator

A switch that controls the throttle valve in the fuel injection system

A switch that controls the engine's temperature and timing

A reversing light switch is a component that controls the reversing lights.

Electrical switches that monitor and control oil pressure in the engine

Vehicle networking system that allows electronic control units to communicate with each other

Lever controlling the rear shift rod in a vehicle

A switch that controls the blower motor in a vehicle's heating or cooling system

A switch that signals the control unit when the throttle valve is closed

Traction control system that intervenes in the engine management to counter wheel slip

The camper interior cabinet assembly built around the sink and its water fittings. In some Vanagon Westfalia layouts it also contains or adjoins the refrigerator, storage, and electrical controls.

Exhaust Gas Recirculation. One of the emission control techniques, in which gases are sucked from the exhaust pipes (before the muffler) and re-circulated through the intake manifold (to be 'burned' again). the high heat associated with exhaust gases required expensive metals ... so replacing/repairing this system can be costly.

The 12-volt battery supply used for camper electrical loads such as interior lighting, the water pump, and controls on the documented Vanagon Westfalia. Whether a particular vehicle has a separate auxiliary battery depends on its model and later modifications.

In a Syncro drivetrain, a driveshaft decoupler disconnects the prop shaft so the front axle is no longer driven through it; it is not the front differential lock. A Gerry discussion on 16 May 2004 compares the original non-viscous-coupling layout, which used a driveshaft decoupler, with viscous-coupling Syncros while debating front-lock behavior. The thread is historical community discussion, not a retrofit procedure; identify the drivetrain configuration before interpreting parts or controls.

The electronic control unit (ECU) is part of Volkswagen’s Digifant fuel-injection and engine-management system. Gerry’s 1986–1991 technical bulletin index distinguishes these applications from the earlier Digijet years. In a January 1999 list thread, an owner of a 1986 Westfalia reported that the engine quit after cooling-system bleeding and asked whether fuel starvation or a failed Digifant component was involved; the thread records a troubleshooting question, not a confirmed diagnosis. Check engine code and market before identifying an ECU.