Removing and installing fuel filter - R8 Coupé: Audi 4.2 (BUJ, BYH, CMPA, CNDA, …)
Step-by-step removing and installing fuel filter - R8 Coupé for the Audi 4.2: 13 steps. What to remove, in what order, and what to check after.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform code 42
- Opens: fuel
Don't miss
- Disregard (item 1).
- Risk of injury caused by fuel.To reduce the pressure in the fuel system, wrap a clean cloth around the connection and carefully loosen the connection. — Press release tab and disconnect fuel line (4) at fuel filter.
📋 Procedure
- Observe safety precautions .
- Observe rules for cleanliness .
- ⚠ To prevent irreparable damage to the electronic components when disconnecting the battery:Observe notes on procedure for disconnecting the battery. — With ignition switched off, disconnect earth cable (arrow) at battery Electrical system27.
- Fit protective covers on bodywork .
- Remove engine compartment trim panel (left-side) General body repairs, exterior53.
- Unbolt engine control unit (left-side) from bracket (arrows) and move clear to one side. [Note: Disregard (item 1).]
- Slacken bolts (arrows) a few turns.
- Remove bolt (2) and detach bracket (1) for engine control unit (left-side).
- ⚠ Risk of injury caused by fuel.To reduce the pressure in the fuel system, wrap a clean cloth around the connection and carefully loosen the connection. — Press release tab and disconnect fuel line (4) at fuel filter.
- Release retaining clip (3) and pull fuel filter slightly towards rear.
- Press release tab and remove fuel line (1, 2).
- Detach fuel filter.
- Slide sleeve (5) onto new fuel filter.
Other AUDI procedures
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- Removing and installing engine control unit J623 – Audi
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- Removing and installing toothed belt – Audi · 56 torque figures
- Removing engine – Audi A8 D3 · 41 torque figures
- Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
- Installing engine – Audi A8 D4 · 36 torque figures
- Removing and installing camshaft timing chain · 29 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.