Removing and installing brake caliper piston, FN 3 — VW
Removing and installing brake caliper piston, FN 3 on VW: 13 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 code AJ5
Don't miss
- 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
- 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.
- 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 assembly tool T10146/6(1).
- Using assembly tool (1) and piston resetting appliance T10145(2), fit protective cap onto brake caliper so that it lies against brake caliper all round its circumference.
- At this stage, it should not be possible to remove protective cap from brake caliper by hand.
- Press piston slightly against protective cap, and fix piston in this position (2).
- To do so, use removal wedge3409, for example.
- Install protective cap using compressed air (max 3 bar) (1). The protective cap then springs onto piston.
- Press piston into brake caliper using piston resetting tool (1).
Other VW procedures
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 torque figures
- Removing and installing mounting bracket, right-hand drive vehicle
- Removing and installing air recirculation flap control motor V113, vehicles without air flow flap control motor V71
- Removing and installing rear centre console vent duct · 1 torque figures
- Removing and installing air intake silencer – VW · 1 torque figures
- Removing and installing front wing
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.