Vacuum brake booster AUDI A6 2008

OEM: 4F0612105N

Disassembled car photo

Engine running

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Details for this exact part

Code
4F0612105N
OEM
4F0612105N
Condition
Used
Availability
1 in stock - ready to ship
Make, model
AUDI A6 2004-2008
Year
2009
Engine
Petrol 2.0L 125KW - BPJ
VIN
WAUZZZ4F69N017477

What is this part and why does it matter?

The brake vacuum booster multiplies the force the driver applies to the brake pedal, using engine (or pump-generated) vacuum, making braking effort much lighter.

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Signs of a faulty part

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

  • Noticeably heavier brake pedal effort
  • Hissing noise when pressing the brake pedal
  • Pedal feels firm immediately, even with the engine running (loss of assist)

Installation information

Requires disconnecting the master cylinder and pedal linkage — always check the pushrod adjustment is correct before finishing installation.

Frequently asked questions

A failed booster (from a vacuum leak, internal diaphragm failure, or check valve fault) removes the power assist, meaning the driver has to provide all the braking force manually — a very noticeable, sudden change.

Donor vehicle description

VIN
WAUZZZ4F69N017477
Make, model
Audi A6
Year
2009
Engine
Petrol 2.0L 125KW - BPJ
Transmission
Automatic - KYQ
Drive
Front
Equipment
LHD
Colour
9X / Y1Q

455 parts from this car

  • Rear bumper AUDI A6 2008
  • Steering gear AUDI A6 2008
  • Front left axle shaft AUDI A6 2008
  • Front right axle shaft AUDI A6 2008
  • Air filter housing AUDI A6 2008
  • Coolant reservoir AUDI A6 2008
  • Automatic transmission AUDI A6 2008
  • Clutch damper AUDI A6 2008
  • Engine AUDI A6 2008
  • Front Left Inner Fender AUDI A6 2008
  • Front Right Inner Fender AUDI A6 2008
  • Rear Left Inner Fender AUDI A6 2008

What our customers say

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    August 2026

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    Paul F.
    June 2026

  • Super fast delivery of the part, and good quality of the used part. Thanks for the service.

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    Front fender
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