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.
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HOMESERVICE MANUALSAUDI2023S6 PRESTIGEREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESTRACTION CONTROLANTILOCK BRAKE SYSTEM (GENERAL INFORMATION - DIAGNOSIS & TESTING)45 ANTILOCK BRAKE SYSTEMDESCRIPTION AND OPERATIONANTILOCK BRAKE SYSTEM HYDRAULIC UNIT COMPONENT OVERVIEW
2023 Audi S6 Prestige
Antilock Brake System Hydraulic Unit Component Overview
2023 Audi S6 PrestigeSECTION Antilock Brake System Hydraulic Unit Component Overview
WARNING:
- Always disconnect the battery ground strap.
- When removing and installing the brake lines, make sure the lines are marked and installed according to the identification on the ABS hydraulic unit.
- Install only original factorymade, pre-formed brake lines.
- Close brake lines and connections immediately with plugs. Brake line tightening torque is 15 Nm (11 ft lb).
- After completing any work that requires opening the brake hydraulic system, bleed the brake system with brake filler and bleeder unit:VAS5234 .
- In addition, carry out a high- and low-pressure test of the brake system HIGH AND LOW PRESSURE, CHECKING .
- Brake line
- ABS hydraulic unit to right-rear brake caliper
- Marking "HR" on ABS hydraulic unit
- Brake line
- ABS hydraulic unit to left-rear brake caliper
- Marking "HL" on ABS hydraulic unit
- Brake line
- ABS hydraulic unit to right-front brake caliper
- Marking "VR" on ABS hydraulic unit
- Brake master cylinder
- With brake booster
- Brake lines
- Brake master cylinder to ABS hydraulic unit
- Bracket
- Install ABS hydraulic unit and fasten
- Cover
- Brake line
- ABS hydraulic unit to left-front brake caliper
- Marking "VL" on ABS hydraulic unit
- Wiring harness
- ABS solenoid valve relay -J106-
- ABS return flow pump relay -J105-
- ABS hydraulic unit -N55-WARNING:
- No repairs may be performed on the ABS hydraulic unit except replacement of the two relays. Do not loosen bolt connections.
- Replace the ABS hydraulic unit only as a complete assembly, if necessary.
- High and low pressure testing HIGH AND LOW PRESSURE, CHECKING
- Ground wire
- Ensure good contact
- Nut
- 10 Nm (7 ft lb)
- Washer
- Serrated washer
- Self-locking nut
- Always replace
- 7 Nm (62 in. lb)
- Bearing bushing
- Rubber mounting
RENDER: 1.0x
NO RELATED
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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.