audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

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Vehicles with automatic gearbox: > < Vacuum diagram

A4 Mk1

MPI fuel injection and ignition system
Vacuum diagram
Vehicles with manual gearbox:
  • Brake servo
  • Non-return valve
  • Vacuum unit
    • ◆ For intake manifold changeover valve
  • Vacuum booster
  • Throttle valve unit
  • Ignition coils -N, -N128, -N158
  • Vacuum reservoir
    • ◆ For intake manifold changeover valve
 
A24-0026
  • Air cleaner
  • Intake manifold
  • ACF sensor
    -G172
    • ◆ US vehicles only
  • ACF
  • Solenoid 1 -N80
  • Fuel pressure regulator
  • T-piece
    • ◆ For vehicles with air conditioner and/or EGR only
  • Non-return valve
 
A24-0026
  • T-piece
    • ◆ For vehicles with air -conditioner only
  • To air conditioner
  • Intake manifold changeover valve -N156
  • EGR valve
    -N18
    • ◆ US vehicles only
  • Noise insulation
  • Mechanical EGR valve
    • ◆ US vehicles only

Vehicles with automatic gearbox: > < Vacuum diagram