Disconnecting reducing agent supply line — VW
Disconnecting reducing agent supply line on VW: 16 steps, engines CKFC, CLHA, CLHB, CLHC. 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: VW Tiguan I (5N, 2007–2016), VW CC (358, 2012–2017), VW Sharan II / SEAT Alhambra (7N, 2010–)
🔧 Engine codes this applies to
📋 Procedure
- Hold connector on both sides, press locking element together, and keep it pressed.
- Press together securing clip of reducing agent line (1) in (direction of arrow 1) as shown in illustration.
- Pull off delivery line in (direction of arrow 2) without tools and without »jerking«.
- Place a cloth underneath coupling point to catch any escaping reducing agent.
- Seal off all open lines and connections with clean plugs from engine bung setVAS 6122.
- Clean all components and connections with water and a lint-free cloth.
- Press and hold locking element (arrows).
- Pull off reducing agent line (2).
- Place a cloth underneath coupling point to catch any escaping reducing agent.
- Seal off all open lines and connections with clean plugs from engine bung setVAS 6122.
- Clean all components and connections with water and a lint-free cloth.
- Press and hold locking element (arrows).
- Pull off reducing agent line (1).
- Place a cloth underneath coupling point to catch any escaping reducing agent.
- Seal off all open lines and connections with clean plugs from engine bung setVAS 6122.
- Clean all components and connections with water and a lint-free cloth.
Other VW procedures
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- Removing and installing front exhaust pipe
- Removing and installing engine control unit J623 (with protective housing)
- Removing and installing front right coolant pipe – VW
- Removing and installing exhaust gas recirculation control motor 2V339
- 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
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.