Servicing ZF power assisted steering box — VW
Servicing ZF power assisted steering box 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.
This repair is restricted to replacing the seals and if necessary the rack. Steering boxes which have been damaged in an accident must always be replaced!
For problem-free and successful repairs the greatest possible consciousness, cleanliness, expertise and the correct tools in good condition are necessary.
Tools required
Notes:
Thoroughly clean hose connections and their immediate vicinity before loosening.
Thoroughly clean work place (bench, vice) before commencing work and if necessary cover work surface e.g. with paper towels.
Only place parts which have been removed on a clean surface. If the repair cannot be completed immediately, cover parts.
Do not use fluffy cloths.
Only unpack replacement parts immediately before fitting.
Only use genuine packed parts.
Corroded racks must not be reused.
Two differing repair kits are available for ZF steering boxes. Allocate affected steering box according to part number from parts microfiche.
Track rod
Bellows
Hose clip
Circlip
Renew
Rack guide
Various versions according to steering box repair kit is allocated according to relevant steering box
Renew
Seal
Is fitted to the rack guide (item
5
) in repair kit
Pressure balance pipe
Check for damage (dents, kinks)
Guide ring (split)
When fitted, renew
Rack
Adjustment bolt
Hexagon bolt, 7 Nm
Cover
Seal
Renew
Spring
Disc
Seal
Renew
Thrust piece
Union nut, 30 Nm
Seal
Renew
Is not included in repair set
=> Parts microfiche
Seal
Renew
Roller bearing
Valve body
Cannot be repaired
Is not available as replacement part, if damage renew steering box
Sleeve with roller bearing
Supplied in repair set as an assembly with seal and bearing
Renew
Seal
Is installed in repair set on sleeve (item
23
)
Circlip
Renew
Housing
Check cylinder contact surface for scoring, if necessary renew steering box complete
Seal
Renew
Support ring
Renew
Ball bearing
Torx bolt, 35 Nm
Renew
Self-locking
Plug, 30 Nm
Seal
Available as a spare part
Pipe
Do not disconnect
Is not available as a replacement part
Seal
A white or black seal is used according to steering box type
Seal
Different type seals are used according to steering box type
Allocation seal (item
34
):
30.0 x 1.78 / white seal
31.0 x 1.5 / black seal
Is already fitted to new racks which are supplied as replacement part
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.