Servicing ceramic brakes (PR 1LU) — AUDI
Servicing ceramic brakes (PR 1LU) on Audi: factory workshop procedure. Full factory text, tools and checks.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
📋 Procedure
ℹ️ Torque figures below come verbatim from workshop data — always cross-check against your vehicle's factory manual before final tightening.
Servicing ceramic brakes (PR 1LU)
Note
Always install all parts supplied in repair kit.
After renewing brake pads, depress brake pedal firmly several times with vehicle stationary so that the pads are properly seated in their normal operating position.
To draw off brake fluid from brake fluid reservoir use a bleeder bottle which is used only for brake fluid. Brake fluid is poisonous and must NOT be drawn off by sucking through a hose.
Exploded view
Damper spring
Ensure correct installation position
Attaching and detaching
Chapter
Retaining spring for brake pads
Bolt
Caution
Do NOT loosen these bolts when removing the brake caliper.
Loosen bolts -12- to remove brake caliper.
Guide pin
Brake caliper
If assembly work is required, do not leave caliper hanging from brake hose but secure it to body with wire
With the exception of
“Removing and installing brake pads”
Chapter
and
“Removing and installing brake caliper”
Chapter
, no repairs may be performed on the brake caliper
Do not twist hose when installing
Allocation
Chapter
, Brakes
Removing and installing
Chapter
Renewing
Chapter
Pad wear indicator
Brake pads
Wear limit
Chapter
There is an adhesive foil on the backplates of the outer brake pads. Remove the protective foil before fitting pads.
Before fitting pads, clean guide surfaces and apply a thin coating of polycarbamide grease
Parts catalogue
Different versions available ⇒ Parts catalogue
Always renew on both sides of axle
Removing and installing
Chapter
Checking pad thickness
Maintenance
Booklet
4E
Locating bolt for brake disc
5 Nm
Brake disc
Wear limit
Chapter
Always renew on both sides of axle
Detach brake caliper prior to removing
Lightly grease contact surfaces between brake disc and wheel hub with polycarbamide grease G 052 142 A2.
Allocation of brake discs
Chapter
Removing and installing
Chapter
Bolts for splash plate
9 Nm
Splash plate
Removing and installing
Chapter
Bolts
Always renew if removed
190 Nm
Brake pistons
WARNING
The brake pistons have different diameters. When re-installing, please make sure that each of the brake pistons is inserted in the correct aperture in the brake caliper. The ceramic inserts on the brake piston act as heat insulators and must not be separated from the brake piston. If the ceramic insert is damaged, the brake pistons must be renewed for safety reasons.
Bracket
Attach to brake caliper
Attach brake line
Bolt for bracket
25 Nm
Brake line connection to brake caliper
19 Nm
Brake line
Screw into brake caliper housing
Screw into brake hose, counter hold on brake hose hexagon.
Do not twist hose when fitting
Ensure that lugs are properly seated in grooves in bracket.
Caution
Do not bend brake line out of shape. The brake line must be renewed if it is damaged.
Brake line connection to brake hose
12 Nm
Brake hose must not be twisted.
Bolt for guide pin
30 Nm
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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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.