Mechanical transmission AUDI A4 2000 AVANT

OEM: 012300057AX DUK12040 5MT

Disassembled car photo

Engine running

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What is this part and why does it matter?

The manual gearbox lets the driver select gear ratios directly via the gear lever and clutch pedal, transferring engine power to the wheels.

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Signs of a faulty part

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

  • Difficulty selecting gears, or grinding when shifting
  • Gear popping out of engagement while driving
  • Whining or grinding noise while driving

Installation information

A major job requiring the gearbox to be removed from the vehicle — best carried out by an experienced mechanic, given the weight and complexity involved.

Frequently asked questions

Most commonly worn synchronisers or detent mechanisms inside the gearbox that can no longer hold the selected gear securely under load.

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