Removing and installing reduction agent supply line: VW Touareg I 3.0 TDI (CATA)

🧭 Before you start

Fits: VW Touareg I (7L, 2002–2010)

Don't miss

• Disregard (arrow 2).

🔧 Engine codes this applies to

📋 Procedure

1. ⚠ The reduction agent can irritate skin, eyes and respiratory organs.After skin contact with this agent, wash immediately with plenty of water.If necessary seek advice from a doctor. — Remove tank for reduction agent .
2. Remove rear left suspension strut Running gear, axles, steering42.
3. Remove both rear left securing bolts (arrows 1) from cross member and slide a wedge between body and cross member to provide slightly more space. [Note: Disregard (arrow 2).]
4. Remove left underbody panel General body repairs, exterior50.
5. Remove heat shield from particulate filter.

6. Open clips of supply line and open upper part in direction of (arrow) for this.
7. Unclip supply line above rear axle and heat shield for particulate filter from retainers.
8. ⚠ Protect separated electrical connections against wetting from reduction agent by suitable means, e.g. plastic bag and cable ties. Electrical connections may be damaged due to the high penetration ability along with subsequent crystallisation of the reduction agent. — First press securing clip for line connection on injector for reduction agent N474 together in direction of (arrow 1.) as shown, and pull off supply line in direction of (arrow 2.) without tools and without »jerking«.
9. Pull supply line (arrow) off injector for reduction agent N474.
10. ⚠ The supply line is pre-formed and is equipped with a heater element over the complete length. Ensure the line is not kinked, twisted or stretched. Otherwise the heater element will be damaged and, consequently, the supply line. — Carefully guide supply line over heat shield of particulate filter.
11. Finally guide supply line out forwards over rear axle and/or subframe.
12. ⚠ The supply line is pre-formed and is equipped with a heater element over the complete length. Ensure the line is not kinked, twisted or stretched. Otherwise the heater element will be damaged and, consequently, the supply line. — First guide supply line over rear axle and/or subframe then over heat shield for particulate filter.
13. Remove sealing plugs and connect supply line to injector for reduction agent N474.
14. Press delivery line into respective clips, working from front to rear.
15. Close retaining clips.
16. Install tank for reduction agent .
17. Install rear left suspension strut Running gear, axles, steering42.
18. Firmly bolt on cross member. Running gear, axles, steering42.

Other VW procedures

• 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
• Adjusting handbrake, disc brakes
• Fitting door window to window regulator – VW Golf IV / Bora · 1 torque figures
• Removing and installing pressure warning switch · 1 torque figures
• Running gear — Removing and installing steering column with column tube, vehicles as of 07.84 · 1 torque figures
• Checking pressures