2000 Audi S4 AutomaticFACTORY OEM SERVICE PROCEDURE

Electrical Component Locator: Switches

SWITCHES

Component Component Location
A/C Pressure Switch Below passenger side headlight.
After-Run Coolant Thermal Switch (2.7L) On rear of left cylinder head, in coolant piping.
Brake Light Switch Above brake pedal, on bracket.
Clutch Pedal Position Switch Above clutch pedal, on bracket.
Clutch Vacuum Vent Valve Switch Above clutch pedal, on bracket.
Coolant Fan Control (FC) Thermal Switch On lower radiator hose.
Engine Coolant Level (ECL) Warning Switch On coolant reservoir.
Hood Alarm Switch Integral with hood latch assembly.
Kickdown Switch (2.8L) On left center of firewall, integral with throttle cable. See Figure.
Multifunction Transmission Range (TR) Switch On left side of transmission, behind mounting bracket.
Oil Pressure Switch (1.8L) On lower left side of engine, on oil filter housing.
Oil Pressure Switch (2.7L) On lower left front of engine, on oil pan extension.
Oil Pressure Switch (2.8L) On lower left front of engine, on oil pan extension.
Trunk Lock Alarm Switch Integral with trunk latch assembly.
Vacuum Vent Valve Brake Switch Integral with brake light switch.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.