Removing and installing injector for reducing agent N474, engine codes CVVA, CVWA — VW
Removing and installing injector for reducing agent N474, engine codes CVVA, CVWA on VW: 15 steps, engines CVVA, CVWA.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Touareg II (7P, 2010–2018)
📋 Procedure
- ⚠ Danger due to escaping reducing agent.Observe safety precautions when working with reducing agent .Wear eye protection. — Remove noise insulation General body repairs, exterior66Noise insulation; Assembly overview - noise insulation.
- Unclip, release and pull off connector (black) on underbody in left area of subframe.
- Expose wiring to injector for reducing agent N474(1).
- Open clamps (3), and pull off water hoses (4) and (5).
- Seal off all openings in lines and connections immediately with suitable plugs from engine bung setVAS 6122.
- Open clamp (2).
- Release and pull off reducing agent line (6).
- Press together securing clip of line (1) in (direction of arrow 1), as shown in illustration, to pull off line.
- Pull off delivery line in (direction of arrow 2) without tools and without »jerking«.
- Seal off all open lines and connections with clean plugs from engine bung setVAS 6122.
- Remove injector for reducing agent N474(1) from exhaust system.
- Fit injector for reducing agent N474 with new sealing washer to SCR catalytic converter, taking into account locking lugs.
- Place new securing clip over connection and push together until it engages. This action locates the injector for reducing agent N474.
- Start bolt, and tighten it to specified torque .
- Connect connector and delivery line.
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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.