Central key control unit AUDI A4 2000 AVANT

OEM: 4A0959981A CU for heated lock cylinder

Disassembled car photo

Engine running

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Details for this exact part

Code
4A0959981A CU for heated lock cylinder
OEM
4A0959981A CU for heated lock cylinder
Condition
Used
Availability
1 in stock - ready to ship
Make, model
AUDI A4 1999-2001
Year
2000
Engine
2.5TDI 110KW AFB
VIN
WAUZZZ8DZYA116176

What is this part and why does it matter?

The central key control module manages communication between the vehicle and key fobs, handling functions like remote locking, keyless entry, and immobiliser authorisation.

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Signs of a faulty part

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

  • Key fob functions (locking, unlocking) not working
  • Vehicle intermittently fails to recognise the key
  • Diagnostic fault code related to the module itself

Installation information

Mounted centrally, connecting to the vehicle wiring harness and antenna system — requires specialist programming to match the vehicle’s keys after replacement.

Frequently asked questions

A weakening antenna connection or a marginal internal fault in this module can cause inconsistent reception of the key’s signal, working sometimes and failing at other times, rather than a clean total failure.

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