Assembly overview - brake servo/brake master cylinder, LHD — VW
Assembly overview - brake servo/brake master cylinder, LHD on VW: factory workshop procedure. Full factory text, tools and checks.
Workshop procedure for VW — 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.
Assembly overview - brake servo/brake master cylinder, LHD
WARNING
Only use new brake fluid conforming to VW standard (VW 501 14).
Pedal cluster
Self-locking hexagon nut, 25 Nm
Renew after removing
Seal
For brake servo.
Brake servo
On petrol engines, the required vacuum is taken either from the intake manifold or generated by a mechanical vacuum pump.
Vehicles with an FSI engine but no HBS are fitted with a pressure sensor
Chapter
.
A vacuum sender is fitted in vehicles with HBS
Chapter
.
Some vehicles with a petrol engine and a dual clutch gearbox, which are not equipped with an HBS (hydraulic brake servo), have an electric vacuum pump
Chapter
.
Diesel engines are fitted with a vacuum pump to generate the necessary vacuum pressure
Chapter
.
Functional check:
With engine switched off, depress brake pedal firmly several times (to exhaust vacuum in unit).
Now step on and hold brake pedal with medium pressure and start engine. If the brake servo is functioning properly, the brake pedal will be felt to go down as the servo takes effect.
Replace completely in the event of a fault (before doing so, check brake servo vacuum system)
Chapter
Removing and installing
Chapter
.
Sealing ring
Brake servo vacuum sender
G483
Only on vehicles having HBS
Removing and installing
Chapter
.
Brake master cylinder
Cannot be repaired. If faulty, renew as a complete unit.
Removing and installing
Chapter
.
Brake light switch
F
Removing and installing
Chapter
.
Torx socket head bolt, 5 Nm
Heat shield
Self-locking hexagon nut, 25 Nm
Renew after removing
Brake line, 14 Nm
From secondary piston circuit of brake master cylinder to hydraulic unit.
Brake line,14 Nm
From primary piston circuit of brake master cylinder to hydraulic unit.
Sealing plug
Moisten with brake fluid and press into brake fluid reservoir.
Brake fluid reservoir
Cap
Vacuum hose
With non-return valve and, additionally on vehicles with FSI engine but without hydraulic brake servo,
vacuum sender
G608
.
Fit in brake servo.
Removing and installing
vacuum sender
G608
Chapter
Sealing plug
Connection for vacuum hose.
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.