Makes and models with 2+2 OBD1 connector

For VAG (Volkswagen Audi Group) cars with a 2+2 OBD1 connector, this primarily applies to older cars from the early to mid-1990s, before the OBD2 standard became common. "2+2" refers to an older type of diagnostic connection consisting of two separate connectors – one black (power) and one white (communication) – often hidden in the engine compartment or near the ashtray.

Makes and models with 2+2 OBD1 connector (approximately 1990–1995):

Volkswagen:

  • Golf Mk3 (early models, 1992–1994)

  • Passat B3/B4 (1990–1995)

  • Vento (early models)

  • Corrado

  • Polo Mk2/Mk3

Audi:

  • Audi 80 / 90 / 100 / 200 (up to approx. 1995)

  • Audi Coupe

  • Audi S2

  • Audi V8

Seat / Skoda:

Early models from SEAT and Skoda with VAG engines from the early 90s may also use 2+2 OBD1, but this is less common.

Transition to OBD2:

From 1996 onwards, the VAG group began to switch to OBD2/OBDII with the 16-pin connector as standard, especially in the US market. In Europe, this transition was gradual until 2001, when it became mandatory.

What you need to read fault codes:

  • A VAG 2+2 to OBD2 adapter cable.

  • A compatible diagnostic tool, for example VAG KKL with software such as VAG-COM (VCDS-Lite).