Removing and installing relay and fuse carrier 2SR2: Audi A4 B9
Step-by-step removing and installing relay and fuse carrier 2SR2 for the Audi A4 B9: 15 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–)
Don't miss
- If fitted, remove rear lid warning buzzer .
- Exact assignment of contacts can be found in applicable current flow diagram .
📋 Procedure
- Saloon: Remove fastening rings and release luggage compartment side trim at bottom General body repairs, interior 70. Luggage compartment trim panels; Removing and installing fastening ring.
- Avant: Remove support for luggage compartment floor General body repairs, interior 70. Luggage compartment trim panels; Exploded view - luggage compartment side trim.
- Open cover in luggage compartment side trim (left-side).
- Release fastener (1).
- Lift off bracket (2) for control units (arrow).
- If fitted, remove rear lid warning buzzer (see the separate procedure).
- Cut through cable tie (1).
- Remove nut (2).
- Disengage catch (arrow).
- Lift relay and fuse carrier 2 (item 3) and pull off towards rear.
- Release retaining clip in direction of (arrow) and press fuse carrier (2) out of relay and fuse carrier 2 (item 1) towards rear.
- 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 pull relay carrier (2) out of relay and fuse carrier 2 (item 1) towards rear.
- Detach relay and fuse carrier 2. [Note: Exact assignment of contacts can be found in applicable current flow diagram .]
Other AUDI procedures
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- Removing and installing particulate filter - vehicles with four-wheel drive
- Removing and installing catalytic converter - vehicles without hybrid drive
- Removing and installing holder for control motor V108 and V411
- Removing heat exchanger of rear air conditioning unit from air conditioning unit and re-installing
- Servicing automatic gearbox 01L, four-wheel drive — Removing and installing selector shaft
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 → · How these pages are made →Workshop data on this page last updated 20 Sep 2026.