Vacuum Diagrams: Introduction

This article contains underhood views or schematics of vacuum hose routing. Use these vacuum diagrams during visual inspection in BASIC DIAGNOSTIC PROCEDURES article. This will assist in identifying improperly routed vacuum hoses which cause driveability and/or computer indicated malfunctions.

Fig 1: Vacuum Diagram (A4 1.8L)

Courtesy of AUDI OF AMERICA, INC.

Fig 2: Vacuum Diagram (A4 2.8L)

Courtesy of AUDI OF AMERICA, INC.

Fig 3: Vacuum Diagram (A6)

Courtesy of AUDI OF AMERICA, INC.