Assembly overview - brake booster/brake master cylinder, LHD vehicles with securing pin — VW
Assembly overview - brake booster/brake master cylinder, LHD vehicles with securing pin on VW: factory workshop procedure.
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 booster/brake master cylinder, LHD vehicles with securing pin
Note
Use only new brake fluid. Observe information on brake fluid reservoir!
Pedal cluster
Removing and installing
Chapter
Separating from brake booster
Chapter
.
Clipping to brake booster
Chapter
.
Nut
25 Nm
Always renew after removing.
Observe tightening sequence
Anchor
.
Seal
For brake booster.
Check for damage.
Brake booster
On petrol engines, the required vacuum is either taken from the intake manifold or generated by a vacuum pump.
Functional check:
With engine switched off, depress brake pedal firmly several times (to deplete vacuum in unit).
Now step on and hold brake pedal with medium pressure and start engine. If the brake booster is functioning properly, the brake pedal will be felt to go down as the servo takes effect.
If faulty renew completely (check all vacuum lines first).
Removing and installing
Chapter
Allocation
Electronic Parts Catalogue
.
Check vacuum system if there are any brake booster malfunctions
Chapter
Sealing ring
Ensure proper seating.
Brake master cylinder
Allocation
Electronic Parts Catalogue
.
Cannot be repaired. If faulty, renew as a complete unit.
Removing and installing
Chapter
Nut
25 Nm
Always renew after removing.
Bolt
5 Nm
Brake light switch
F
Including
brake pedal switch
F47
.
Removing and installing
Chapter
Brake line
Brake master cylinder/secondary piston circuit to
ABS hydraulic unit
N55
.
Identification: ∅ 6.5 mm and brake line nut with thread M12 x 1
14 Nm
Brake line
From primary piston circuit of brake master cylinder to
ABS hydraulic unit
N55
.
Identification: ∅ 6.5 mm and brake line nut with thread M12 x 1
14 Nm
Sealing plug
Connection for vacuum hose.
Sealing plug
Moisten with brake fluid and press into brake fluid reservoir.
Securing pin
Push to the right to remove brake fluid reservoir
Brake fluid reservoir
Removing and installing
Chapter
Cap
With
brake fluid level warning contact
F34
Vacuum line
Fit in brake booster.
Allocation
Electronic Parts Catalogue
.
If any brake booster malfunctions have occurred, check this part
Chapter
Vacuum sender
G608
Vacuum sender
G608
in the case of vehicles equipped with hydraulic brake servo (hydraulic brake with vacuum servo)
Removing and installing
vacuum sender
G608
Chapter
Allocation
Electronic Parts Catalogue
.
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.