A4 Quattro Sedan L4-2.0L Turbo (CAEB) (2009)
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Remove footwell vents - A-B -.
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Remove brake lamp sensor => [ Brake Lamp Sensor ] See: Brake Intervention Sensor / Switch/Service and Repair.
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Disconnect brake pedal from brake booster => [ Brake Pedal and Brake Booster, Disconnecting and Connecting ] See: Brake Pedal Assy/Service
and Repair/Brake Pedal and Brake Booster, Disconnecting and Connecting.
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Remove engine cover.
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Remove plenum chamber cover
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Remove tower brace.
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Remove plenum chamber bulkhead
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Remove brake fluid reservoir => [ Brake Fluid Reservoir ] See: Hydraulic System/Brake Fluid Reservoir/Service and Repair/Brake Fluid
Reservoir.
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Remove brake master cylinder at the nuts - 3 - => [ Brake Master Cylinder ] See: Hydraulic System/Brake Master Cylinder/Service and
Repair/Brake Master Cylinder.
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Remove brake master cylinder from vehicle.
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Place brake master cylinder so no brake fluid can drain out.
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Remove vacuum line - 3 - from brake booster.