Removing and installing control unit and hydraulic unit — AUDI
Removing and installing control unit and hydraulic unit on Audi: 13 steps. What to remove, in what order, and what to check after.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform code 7DA
- Opens: brake fluid
Don't miss
- Do not bend the brake lines in the area of the hydraulic unit! — Note or request radio code on vehicles with coded radio if necessary.
📋 Procedure
- ⚠ Do not bend the brake lines in the area of the hydraulic unit! — Note or request radio code on vehicles with coded radio if necessary.
- Disconnect battery earth strap.
- Release control unit connector (arrow 1) and pull off (arrow 2).
- Draw off as much brake fluid as possible from brake fluid reservoir using a suction bottle.
- Fit brake pedal depressorV.A.G 1869/2.
- Depress brake pedal with brake pedal depressor.
- Connect bleeder bottle hose to front left brake caliper bleed screw and open bleed screw.
- Close front left bleeder screw.
- Place sufficient lint-free cloths under the control unit and hydraulic unit.
- Unscrew brake lines from hydraulic unit and electronic stabilisation programme hydraulic pump; seal brake lines and threaded holes with plugs.
- Remove hydraulic unit with control unit and ESP hydraulic pump. [Note: Do not remove sealing plugs from hydraulic unit until corresponding brake line is fitted.If sealing plugs are removed too early from the hydraulic unit, brake fluid can escape, and it can then no longer be guaranteed that the unit can be sufficiently filled and bled.]
- Installation is continued in reverse sequence
- Bleed brake system .
Other AUDI procedures
- Removing and installing toothed belt – Audi · 56 torque figures
- Removing engine – Audi A8 D3 · 41 torque figures
- Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
- Installing engine – Audi A8 D4 · 36 torque figures
- Removing and installing camshaft timing chain · 29 torque figures
- Removing and installing intermediate sleeve for drive pinion shaft.
- Removing and installing ESP (electronic stability program) hydraulic pump
- Removing and installing steering angle sensor -G85
- Servicing brake caliper
- Checking relative density of electrolyte in all cells
Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.