Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Abs Mark 70 (Abs/ASR)
- ABS Control Module -J104-
- Removing and installing, refer to CONTROL MODULE AND HYDRAULIC UNIT, REMOVING
- ABS Hydraulic Unit -N55-
- Removing and installing, refer to CONTROL MODULE AND HYDRAULIC UNIT, REMOVING
- Brake Line
- Master brake cylinder/primary piston circuit to hydraulic control unit
- Identification: Tube fitting with threads M 10 x 1
- Brake Line
- Master brake cylinder/secondary piston circuit to hydraulic unit
- Identification: Tube fitting with threads M 12 x 1
- Brake Line
- To left front brake caliper
- Identification: Tube fitting with threads M 12 x 1
- Brake Line
- To right front brake caliper
- Identification: Tube fitting with threads M 10 x 1
- Brake Line
- To left rear brake caliper
- Identification: Tube fitting with threads M 12 x 1
- Brake Line
- To right rear brake caliper
- Identification: Tube fitting with threads M 10 x 1
- Inner Torx® Bolt
- Use new bolts.
- 5.5 Nm
- Bracket
- Hex Bolt
- 8 Nm
- Gasket
- For brake booster
- Brake Booster
- On gasoline engines, vacuum is supplied from intake manifold.
- Functional check:
-- With engine switched off, depress brake pedal firmly several times (to deplete vacuum in tool).
-- Depress and hold brake pedal with average foot pressure and start engine. If brake booster is working properly, pedal will be felt to give noticeably under foot (booster assistance becomes effective).
- Replace as a unit in the event of malfunction (previously, check all vacuum lines).
- Removing and installing, refer to BRAKE BOOSTER
- Seal
- Brake Master Cylinder
- Cannot be serviced. Replace as complete unit if malfunctioning.
- Removing and installing, refer to BRAKE MASTER CYLINDER
- Hex Nut
- Always replace after removing it.
- 25 Nm
- Sealing Plugs
- Coat with brake fluid and press into brake fluid reservoir
- Brake Fluid Reservoir
- Cap
- Sealing Plugs
- Connection for vacuum hose
- Vacuum Hose
- Insert into brake booster
- Brake Booster Pressure Sensor -G294-
- On vehicles with FSI engine without Hydraulic Brake Vacuum Booster
- Removing and installing, refer to BRAKE BOOSTER PRESSURE SENSOR
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.