A6 Quattro Sedan V6-3.0L (AVK) (2002)
The hydraulic control unit is located on the left-hand side of the engine compartment.
Removing
CAUTION! Do not bend brake lines.
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For vehicles equipped with coded anti-theft radio, note radio code, obtain if necessary.
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Disconnect battery.
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Disengage connector from control module (arrow -1-) and disconnect (arrow -2-).
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Connect bleeder bottle to bleeder screw on left-front brake caliper and open bleeder screw.
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Insert brake pedal depressor between brake pedal and driver's seat. Depress brake pedal at least 60 mm.
Note: Do not remove brake pedal depressor until all brake lines have been reconnected to the hydraulic control unit.
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Close left-front bleeder screw.
Note: Cover engine compartment to make sure that brake fluid does not flow into it.
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Disconnect brake line connections at hydraulic control unit.
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Seal brake lines and threaded holes using plugs from repair kit, Part No. 1 HO 698 311 A.
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Remove hex-nuts at hydraulic control unit bracket.
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Remove hydraulic control unit.
When installing, pay particular attention to the following points
Notes:
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Only remove sealing plugs on new hydraulic control unit when the corresponding brake line is about to be installed.
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If the sealing plugs are removed too early, brake fluid can escape. If this occurs, the unit may not be sufficiently filled or adequately bled.
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Bleed brake system, Refer to Brake Bleeding.
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Enter radio code.