Removing and installing brake calliper piston FN 3 — VW
Removing and installing brake calliper piston FN 3 on VW: 15 steps. What to remove, in what order, and what to check after.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform codes 5C7, 5C1
Don't miss
- Do not blow out brake system with compressed air; the resulting dust constitutes a health hazard! — The surfaces of the piston and seal must be cleaned only with methylated spirits and then dried.
- Apply thin coat of assembly pasteG 052 150 A2 to piston and seal before installing.
📋 Procedure
- Remove brake caliper .
- Press piston out of brake caliper using compressed air (arrow).
- Lever off protective cap from brake caliper using removal wedge3409.
- Remove seal using removal wedge3409.
- ⚠ Do not blow out brake system with compressed air; the resulting dust constitutes a health hazard! — The surfaces of the piston and seal must be cleaned only with methylated spirits and then dried.
- Apply thin coat of assembly pasteG 052 150 A2 to piston and seal before installing.
- Insert seal into brake caliper.
- Insert protective cap (A) into tool.
- Push protective cap onto brake caliper with assembly tool in such a way that cap lies against brake caliper all round its circumference.
- It should not be possible to remove protective cap from brake caliper by hand.
- Press piston lightly against protective cap.
- Fix piston in this position.
- Blow air into protective cap using compressed air (max 3 bar) (1). The protective cap then springs onto piston.
- Press piston into brake caliper.
- Install brake caliper .
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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.