Engine control unit AUDI A4 2001

OEM: 8E0909557

Disassembled car photo

Engine running

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Details for this exact part

Code
8E0909557
OEM
8E0909557
Condition
Used
Availability
1 in stock - ready to ship
Make, model
AUDI A4 1999-2001
Year
2001
Engine
Petrol 2.0L 96KW - ALT
VIN
WAUZZZ8E72A008091

What is this part and why does it matter?

The engine control unit (ECU) is the central computer managing engine operation — fuel injection, ignition timing, emissions control, and more — based on data from numerous sensors.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

  • Engine won’t start or runs very poorly
  • Multiple, seemingly unrelated engine-related faults appearing together
  • Check Engine light constantly on with numerous fault codes

Installation information

Mounted in the engine bay, connecting to the extensive engine wiring harness — requires specialist programming/coding to match the specific vehicle and, often, the immobiliser system.

Frequently asked questions

The ECU needs to be correctly programmed with software matching the exact vehicle, engine variant, and often synchronised with the immobiliser system — this typically requires specialist diagnostic equipment and expertise.

Donor vehicle description

VIN
WAUZZZ8E72A008091
Make, model
AUDI A4
Year
2001
Engine
Petrol 2.0L 96KW - ALT
Transmission
Mechanic - FTX
Drive
Front
Equipment
LHD
Colour
5B / Y7W

91 parts from this car

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  • Coolant reservoir AUDI A4 2001
  • Airbag control unit AUDI A4 2001
  • Climate control unit AUDI A4 2001
  • Speedometer AUDI A4 2001
  • Car part AUDI A4 2001
  • Rear left door lock AUDI A4 2001
  • Front right door lock AUDI A4 2001
  • Fog light grille, left AUDI A4 2001
  • Rear right lamp AUDI A4 2001
  • Rear left lamp AUDI A4 2001
  • Steering gear AUDI A4 2001

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    August 2026

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    June 2026

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