2005 Audi TT Base, 2D ConvertibleFACTORY OEM SERVICE PROCEDURE

Engine specifications

Engine code  AMU  ATC 
Manufactured from 10.99 07.98
No. of cylinder/valves per cylinder 4/5 4/5
Capacity ltrs 1.781 1.781
Power output kW @ RPM 165/5900 132/5500-6000
Torque Nm @ RPM 280/2200-5500 235/2000-4600
Bore mm 81.0 81.0
Stroke mm 86.4 86.4
Compression ratio 9.0:1 9.5:1
Engine code  AMU  ATC 
Injection/ignition Bosch Motronic Bosch Motronic
RON min. 98 1) premium unleaded (Super Plus) 98 1) premium unleaded (Super Plus)
Hydraulic valve lifters X X
On Board Diagnostic (OBD)   X X
Catalytic converter X X
Lambda closed-loop control X X
Exhaust gas recirculation - -
Turbocharger X X

1) Premium unleaded gasoline with 95 RON can also be used, but will cause a slight loss of power.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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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.

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