Removing and installing relay and fuse carrier 1SR1: Audi A4 B9
Step-by-step removing and installing relay and fuse carrier 1SR1 for the Audi A4 B9: 16 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: Audi A4 B9 (8W, 2015–)
📋 Procedure
- Remove cover (bottom) on driver's side General body repairs, interior68Shelves / trim panels; Removing and installing dash panel cover (driver's side).
- Remove sill panel trim (front left) General body repairs, interior70Passenger compartment trim panels; Removing and installing sill panel trim.
- Disconnect earth cable from battery with ignition switched off .
- Fold floor covering to side as far as possible in area of relay and fuse carrier 1.
- Unplug electrical connectors (2, 3).
- Cut through cable ties (1, 4).
- Move clear electrical wiring harness (6).
- Remove nuts (arrows).
- Detach relay and fuse carrier 1 (item 5) from studs and pull it off body towards inside.
- Release retaining clip (arrow), press out fuse holder (item 2) towards rear and disengage from relay and fuse carrier 1 (item 1).
- Release retaining clip and press off additional fuse holder (2).
- Release retaining clips (arrows) and pull relay (1) and control units out of relay carriers.
- Release retaining clips (arrows) and press relay carrier (3) towards rear out of retainer (4).
- Release retaining clip (1) and press connector (2) out of retainer.
- Detach relay and fuse carrier 1.
- 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
- Removing and installing curtain airbag with igniter, passenger compartment
- Removing and installing bench seat / individual seats
- Removing and installing roof ventilator V3
- Removing and installing rear vent temperature sender G174 · 1 torque figures
- Removing and installing rear right side panel trim, »California Coast and Ocean«
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.