| Brake system (ABS hydraulic unit -N55-, brake hoses, brake lines and brake calipers) is working properly and is not leaking. |
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| Remove bleeder valve at one of front brake calipers. Connect tester for brake pressure regulator -V.A.G 1310A- and bleed. |
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| Apply pressure to brake pedal until gauge indicates a pressure of 50 bar. The pressure must not drop by more than 4 bar within the test period of 45 seconds. Renew brake master cylinder if drop in pressure exceeds specification. |
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