Removing and installing fuel filter, engine code AJS: VW Phaeton 4.9 TDI (AJS)
Step-by-step removing and installing fuel filter, engine code AJS for the VW Phaeton 4.9 TDI (AJS): 14 steps, 1 torque figure.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Phaeton (3D)
- Special tools named: V.A.G 1390, V.A.G 1390/1
- Renewed: seal between connecting piece
Don't miss
- Pull supply hose (3) (white marking) and return hose (2) (blue marking) off fuel filter.
🔧 Engine codes this applies to
🔩 Torque settings
Values can differ between engine variants — check the code stamped on your block.
| Torque | Fastener / step |
|---|---|
| 3 Nm (2.2 lb-ft) | Tighten plug for water drainage connection |
ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.
📋 Procedure
- Connect hand vacuum pump V.A.G 1390 with bleeder bottle V.A.G 1390/1 to water drain plug of fuel filter.
- Operate hand vacuum pump until no more fuel comes out. Be careful that no fuel is sucked into hand vacuum pump.
- Unscrew both securing bolts (1), and remove connecting piece with fuel lines.
- Pull supply hose (3) (white marking) and return hose (2) (blue marking) off fuel filter.
- Open filler cap on coolant expansion tank.
- Clamp off both coolant hoses (4) with hose clamps, up to Ø 25 mm3094.
- Pull off coolant hoses and collect escaping coolant with a cloth.
- Unscrew both securing bolts (arrows), and pull fuel filter slightly towards front.
- Unclip lines on rear of fuel filter.
- Release and pull off connector for fuel composition sender G133.
- Remove fuel filter.
- Renew seal between connecting piece and fuel filter cover.
- Tighten plug for water drainage connection to 3 Nm — 3 Nm (2.2 lb-ft)
- Replenish coolant 19Draining and filling with coolant.
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- Removing and installing unit injector – VW Golf IV / Bora · 9 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 torque figures
- Removing and installing starter – VW Polo 9N · 2 torque figures
- Removing and installing steering lock housing · 1 torque figures
- Gear selectorVX65 (with gearbox installed) - remove and install
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.