Renewing brake caliper - steel version brakes (1LM / 1LX) — AUDI

🧭 Before you start

Fits: Audi A6/A7 C7 (4G, 2011–2018); platform code 4X

• Opens: brake fluid
• Renewed: if necessary

Don't miss

• This closes the valves in the brake master cylinder and stops the brake fluid reservoir from running empty.
• Place a cloth under the connection to catch escaping brake fluid.
• The brake pedal actuatorV.A.G 1869/2 must not be removed.
• Disregard item (3).
• Make sure the brake hose is routed correctly.The brake hose must not be kinked, crushed or twisted or chafe against parts of the vehicle at any point.

📋 Procedure

1. Insert brake pedal actuatorV.A.G 1869/2 between brake pedal and driver's seat. Depress brake pedal at least 60 mm. [Note: This closes the valves in the brake master cylinder and stops the brake fluid reservoir from running empty.]
2. Remove front wheel Running gear, axles, steering44Wheels, tyres. [Note: Place a cloth under the connection to catch escaping brake fluid.]
3. ⚠ Risk of skin irritationAlways wear chemical-resistant protective gloves to prevent brake fluid from contacting skin.Accident risk: if the water content in the brake fluid is too high, this can cause vapour bubbles in the fluid.Brake fluid is hygroscopic, i.e. it absorbs moisture from the surrounding air.Seal open brake hoses and brake lines using sealing plugs from assembly parts set5Q0 698 311.Risk of malfunction if brake fluid comes into contact with fluids containing mineral oils.Do not under any circumstances allow brake fluid to come into contact with fluids that contain mineral oils (e.g. oil, petrol, cleaning agents). Protective gloves must be free of oil and grease.Risk of damage to paintwork surfacesDue to its corrosive effect, brake fluid must not be allowed to come into contact with paintwork. Rinse off brake fluid spillages immediately using plenty of water. — Detach protective cap (3) from bleeder screw (1).
4. Fit bleeder hose (2) of reservoir onto bleeder screw.
5. Open bleeder screw to relieve pressure in hydraulic system.

6. Close bleeder screw and remove reservoir. [Note: The brake pedal actuatorV.A.G 1869/2 must not be removed.]
7. Unscrew union screw (2).
8. Move brake hose clear at brackets (arrows).
9. Unscrew and disconnect brake hose (1) from brake caliper. [Note: Disregard item (3).]
10. Unplug electrical connector (2) for brake pad wear indicator.
11. Release electrical connector (1) for pad wear sender from bracket (arrow A) and at the same time turn 90° (arrow B). [Note: To make it easier to detach the brake caliper from the brake disc, use suitable pliers (1) to press the brake pads (3) slightly back into the caliper. To avoid damaging the paint on the caliper, insert a piece of rubber (2) between the caliper and the pliers.]
12. Remove bolts (1) and carefully pull brake caliper off brake disc with brake pads installed.
13. Remove brake pads if necessary .
14. Locate brake caliper in installation position and tighten new bolts (1).
15. Install brake pads .
16. Attach brake hose (1) to caliper and tighten connection.
17. Check retaining spring (3) for damage and renew if necessary.
18. Insert brake hose into brackets (arrows) and connect to brake line: tighten union screw (2). [Note: Make sure the brake hose is routed correctly.The brake hose must not be kinked, crushed or twisted or chafe against parts of the vehicle at any point.]
19. Remove brake pedal actuatorV.A.G 1869/2.
20. Bleed brake system (only at wheel where caliper was detached and brake hose disconnected) Bleeding hydraulic system (normal bleeding procedure). [Note: If the brake pedal still feels "“soft”", bleed the complete brake system Bleeding hydraulic system (normal bleeding procedure).]
21. Fit front wheel Running gear, axles, steering44Wheels, tyres.

🎬 Related video tutorial

Independent AUTODOC tutorial for the same job, filmed on a different model (A6 C5 Avant) — the technique carries over, the fasteners and figures on this page are the ones for your car.

How to change front brake caliper on AUDI A6 C5 Avant

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 bracket for shut-off valves – Audi · 1 torque figures
• Removing and installing oil pump drive - vehicles from model year 2014 onwards
• Removing and installing coolant pipe (rear left) - vehicles up to model year 2013
• Removing and installing coolant pipe on right side of gearbox - vehicles up to model year 2013
• Removing and installing bottom section of intake manifold, cylinder bank 1 (right-side)