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In Gerry’s preserved terminology FAQ, “generation” groups Transporters by body series: T1 (1949–1967), T2 (1968–1979), T3 (1980–1991; called Vanagon in North America), and T4 (1992 onward in that FAQ). In Gerry’s September 2008 “lowered and chopped Vanagon” exchange, contributors identify the same T3 generation as Vanagon in North America and T25 in the UK; replies disagree over whether “T25” is proper usage. The name therefore depends on regional convention and is not a precise model-year identifier. These are historical ranges and naming conventions; verify market and model year.

Filter that cleans fuel before it enters the engine

Sensor that measures oxygen levels in the exhaust gas

An uneven or unstable engine idle

Sensor that monitors the coolant level in the engine

a screw used to bleed air from a heating system

A type of fastener used to secure wires, hoses, or other items.

Component that regulates airflow into the engine

A type of contaminant that can occur when silicates drop out of the coolant

System that monitors oil pressure in the Wasserboxer engine

Westfalia is a camper-conversion brand, not a Transporter generation. Gerry’s preserved FAQ describes Westfalia as one of several companies that converted VW Transporters and says it was generally the camper version imported and sold through Volkswagen dealers in the United States at that time. Roof, interior, and equipment depend on the specific vehicle and year.

Sensor measuring oxygen levels in exhaust, without connector

Specifications for the correct amount and type of lubricant to use

a type of lubricant designed to withstand high temperatures

a tool used to remove air from the brake system

Pump that supplies fuel to the engine

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.

Dehler was a German conversion company whose VW Transporter campers and business-van layouts appear in Gerry’s preserved terminology FAQ. Archive discussions make the model distinction clearer: a 1999 thread concerns a Dehler Profi conversion sighting, while a 2005 thread describes a rare Dehler Profi high-roof camper. “Dehler” therefore identifies the converter; Profi is a particular conversion line, not a separate Transporter generation. Confirm the exact build and year for parts or fitment.

a device that transfers heat from one fluid to another

Seat belts that are installed in the rear bench seat