2000 Audi TT QuattroFACTORY OEM SERVICE PROCEDURE

Control Units

CONTROL UNITS

Component Component Location
ABS Control Module In left rear corner of engine compartment.
Air Bag Control Module Beneath center of dash, near accelerator pedal.
All-Wheel Drive Control Module On Haldex coupling, on rear differential.
Central Locking Control Module Forward of left rear fenderwell, behind panel. See Figure .
Coolant Fan Control (FC) Control Module In lower left front corner of engine compartment.
Fresh Air Blower Control Module Behind right end of dash, on HVAC housing.
Headlight Beam Adjusting Control Module Beneath left side of rear seat.
High Intensity Gas Discharge Lamp Control Module (Left/Right) Below respective headlight, on framerail.
Lamp Control Module On 13-fold relay panel. See Figure .
Mirror Fold-Away Function Control Module On 13-fold relay panel. See Figure .
Motronic Engine Control Module (ECM) In center of plenum, between firewall and windshield base. See Figure .
Power Window Control Module (Left/Right) In respective door, integral with power window motor unit.
Throttle Valve Control Module On throttle body, on left front of engine. See Figure .
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Factory Service Tools

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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.