Removing and installing main fuse box, on rear right in luggage compartment - vehicles with 2.5 ltr. TFSI engine and 3.2 ltr. MPI engine — AUDI
Removing and installing main fuse box, on rear right in luggage compartment - vehicles with 2.5 ltr. TFSI engine and 3.2 ltr.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A3 (8P, 2003–2012)
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- Exact contact assignment of relay and fuse holder can be found in appropriate current flow diagram .
📋 Procedure
- With ignition switched off, disconnect earth cable at battery .
- Switch off ignition and take out ignition key.
- Take out rear moulded insert (3) for tools from under luggage compartment floor.
- Take out front moulded insert (left-side) (1).
- Release securing strap (3) and take out front moulded insert (2) for tools (right-side).
- Open cover on main fuse box, located in luggage compartment.
- Unscrew electrical wiring (1), (2) and (4).
- Unplug electrical connector (5) for battery isolation igniter N253.
- Unscrew nuts (arrows).
- Take out main fuse box, in luggage compartment (3). [Note: Exact contact assignment of relay and fuse holder can be found in appropriate current flow diagram .]
- Connect battery. Steps required .
Other AUDI procedures
- 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
- Checking data exchange between control units
- Connecting vehicle diagnostic, measuring and information system VAS 5051 or fault reader V.A.G 1551 and selecting function
- Checking air quality sensor -G238
- Testing Hall sender
- Testing secondary air pump relay -J299 and activation
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.