Audi Q3 Owners & Service Manuals

Audi Q3: Overview - Brake Booster/Master Brake Cylinder

Audi Q3 (8U) 2011-2018 Service Manual / Chassis / Brake System / Hydraulic Components / Overview - Brake Booster/Master Brake Cylinder


Brake master cylinder and brake boosters can be replaced independently of one another.

Audi Q3. Overview - Brake Booster/Master Brake Cylinder

1 - Heat Shield

2 - Nut

  • 25 Nm
  • Always replace if removed
  • Self-locking

3 - Sealing Plug

  • Coat with brake fluid and press into brake fluid reservoir

4 - Bolt

  • 5 Nm

5 - Brake Fluid Reservoir

  • Removing and installing, refer to → Chapter "Brake Fluid Reservoir, Removing and Installing".

6 - Seal

7 - Cap

8 - Grommet

9 - Brake Booster

  • Functional check:
    • With engine switched off, depress brake pedal firmly several times (to exhaust the vacuum in the unit).
    • Depress and hold brake pedal with average foot pressure and start engine. If brake booster is working properly, pedal will be felt to give noticeably under foot (booster assistance becomes effective).
  • Disconnect from brake pedal, refer to → Chapter "Brake Pedal, Removing from Brake Booster".
  • Removing and installing, refer to → Chapter "Brake Booster, Removing and Installing".

10 - Seal

  • For brake booster

11 - Nut

  • Tightening specification and sequence, refer to item -2-.

12 - Seal

  • Replace after removing

13 - Bolt

  • 5 Nm

14 - Brake Lamp Switch -F-/Brake Pedal Switch -F63-

  • Removing and installing, refer to → Chapter "Brake Lamp Switch, Removing and Installing".

15 - Brake Master Cylinder

  • Cannot be serviced
  • If malfunctioning: replace as complete unit.
  • Removing and installing, refer to → Chapter "Brake Master Cylinder, Removing and Installing".

16 - Rubber Buffer


     Brake Lamp Switch, Removing and Installing

      Note The Brake Lamp Switch -F-/Brake Pedal Switch -F63- is installed in the brake master cylinder. Removing Audi RS Q3: - Remove the air filter housing, refer to → Engine

     Brake Master Cylinder, Removing and Installing

    Special tools and workshop equipment required Brake Charger/Bleeder Unit -VAS5234- Sealing plugs from Repair Kit -1H0 698 311 A- Removing - Remove the brake fluid reservoir,

     Overview - Electric Vacuum Pump

    1 - Brake System Vacuum Pump -V192- Allocation, refer to the Parts Catalog. Installed location: in the engine compartment over the engine transmission separating point. Do not di


     Opening and closing the luggage compartment lid

    Fig. 28 Rear lid: handle Fig. 29 Driver's door: opening the luggage compartment lid Opening the luggage compartment lid Applies to: vehicles without convenience key: Unlock the vehicle or the luggage compartment lid using the button on the vehicle key and press the handle in the luggage co

     Overriding control

    Applies to: vehicles with adaptive cruise assist Fig. 103 Lever: overriding the control Requirement: the adaptive cruise assist must be switched on. Overriding control You can completely override the control, for example when passing or if you would like to accelerate more quickly. To accelerate

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