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Diagrams, engine codes and swearing at 23:47 on a Tuesday.
Technical archive · built on the forum

Twenty years of T4 put in order.

The forum is a gold mine. But finding the right thing when you are halfway through a job with the bonnet up is another matter. Here we gather the essentials by family and by subject area: engines, wiring diagrams, parts that age badly, and the forum topics where the answer has already been given.

MechanicsElectrical systemBodywork & chassisCamper conversion
Section still being tested

This part of the site — which we want to become the beating heart of the forum — is still experimental. The goal is to catalogue, tidily, by vehicle and by subject area, every post the community has written on the forum.

The information below is partial, incomplete and in part only text samples: bear with us a little longer, everything will fall into place :)

01 — Index by family

Six families, one single T4 platform.

Every T4 shares the same chassis, engines and systems. What changes is the body: panel van, shuttle, day-van, camper, pick-up, four-wheel drive.

01
Transporter
1990 — 2003
Panel van, work van, no frills. The bare-bones but hugely common version of the T4. Three wheelbases (short, long, extra long), low or high roof.
Mech.Elec.Body
24 topics
02
Caravelle
1990 — 2003
People-carrier trim with up to 9 seats. Windows all round, seats in the second and third rows. The base of many home-built campers.
Mech.Elec.Body
14 topics
03
Multivan
1990 — 2003
VW’s day-van: a folding bench, a table in the second row, special trims (Atlantis, Allstar, Last Edition). Not a camper, but people sleep in it.
Mech.Elec.Body
18 topics
04
California / Westfalia
1990 — 2003
The factory camper by VW (Westfalia conversion): pop-top roof, side kitchen, compressor fridge, bench bed. The most sought after of the T4 range.
Mech.Elec.BodyCamper
31 topics
05
Double cab (DoKa)
1990 — 2003
Pick-up with a 5-seat double cab and a rear bed. The rarer version, popular with tradespeople and for creative restorations.
Mech.Elec.Body
6 topics
06
Syncro 4×4
1992 — 2003
Permanent four-wheel drive with a viscous coupling at the rear. Available on the Caravelle, California, Multivan and Transporter. The rarity of the T4 family.
Mech.Elec.Body
9 topics
Work in progress

The archive grows, one topic at a time.

Wiring diagrams as PDFs, parts sheets, step-by-step guides: we are gradually moving the forum’s knowledge into a browsable format. If you want to contribute (photos, scans, writing), get in touch on the forum.