Q7 Quattro V6-3.6L (BHK) (2007)
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Brake Bleeding: Service and Repair
Pre-Bleeding
Brake System, Bleeding
‹› Bleeding the braking system on vehicles with ABS is carried out as for vehicles with conventional braking systems.
‹› Only use new brake fluid conforming to US-Norm FMVSS 116 DOT 4.
‹› Genuine VW/Audi brake fluid conforms to this specification.
‹› Brake fluid is poisonous. Due to its caustic nature, it must also never be brought into contact with paint.
‹› Brake fluid is hygroscopic, meaning that it absorbs moisture from the surrounding air, and must therefore be stored in air-tight containers.
‹› Rinse off spills, by using plenty of water.
‹› After bleeding brake system, basic setting for brake pressure sensor 1 (G201) must be performed.
There must be a positive pressure of 2 bar to bleed the hydraulic unit.
Special tools, testers and auxiliary items required
‹› Brake filler/bleeder unit (VAS 5234)
‹› If one chamber of the brake fluid reservoir has run completely empty (e.g. leak in the brake system), the brake system must be pre-bled first.
Pre-Bleeding
‹› There are two bleeder valves installed on Brembo brake calipers. Always bleed at both bleeder valves.
‹› Bleed at outer bleeder valve first.
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Connect Brake filler/bleeder unit (VAS 5234).
Bleeding sequence:
1 - Bleed left front and right front brake caliper together simultaneously
2 - Bleed left rear and right rear brake caliper together simultaneously
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With bleeder bottle hoses attached, leave bleeder valves open long enough that brake fluid exits without bubbles.
Then the hydraulic unit must be bled again with "Basic setting " function using the (VAS 5051B or VAS 5052).
Initiate basic setting (to bleed brake system):
Connect (VAS 5051B) or (VAS 5052) and select Function. Refer to => [ VAS 5051B and VAS 5052, Connecting and Selecting Functions ] See:
Antilock Brakes / Traction Control Systems/Testing and Inspection/VAS 5051B and VAS 5052, Connecting and Selecting Functions.
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Then, brake system must be bled normally
