Q7 Quattro V6-3.6L (BHK) (2007)
Brake Master Cylinder: Service and Repair
Brake Master Cylinder, Removing and Installing
Brake master cylinder, removing and installing
Note: The brake master cylinder cannot be serviced. If malfunctioning, replace entire unit.
Special tools, testers and auxiliary items required
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Brake filler bleeder unit VAS 5234
Removing
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Remove plenum chamber cover.
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Remove engine compartment seal and cover strip in area of brake booster.
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Remove facing wall of plenum chamber.
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Place sufficient lint-free cloths in plenum chamber in area of brake master cylinder.
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Extract as much brake fluid as possible from brake fluid reservoir using brake filler bleeder unit VAS 5234 or extraction device upgrade kit
V.A.G. 1869/4.
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Disconnect connector off float warning indicator sensor.
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On vehicles with manual transmission, disconnect clutch master cylinder supply hose and seal with plug.
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Remove brake fluid reservoir, press engagement straps toward outside at reservoir and simultaneously pull brake fluid reservoir out of sealing
plugs.
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Remove left front brake line from retainer on master brake cylinder.
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Disconnect brake lines from master brake cylinder and seal brake lines using Sealing Plugs 1H0 698 311 A from repair kit.
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Remove nuts from brake master cylinder.
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Carefully take brake master cylinder out of brake booster.
Installing
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Installation is in reverse order of removal.
Observe the following points when installing:
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When installing together the brake master cylinder and brake booster, make sure that the push rod is correctly located in the brake master cylinder.
O-ring between brake master cylinder and brake booster is present.
Always use new nuts.
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Bleed braking system.
After bleeding brake system, basic setting for brake pressure sensor 1 G201 must be performed.
VAS 5051 or VAS 5052, connecting and selecting functions.