TorqFix

Removing and installing 4-position relay and fuse carrier with screw connection — AUDI

Removing and installing 4-position relay and fuse carrier with screw connection on Audi: 12 steps. What to remove, in what order, and what to check after.

The 4-position relay and fuse carrier with screw connection sits under the driver's side dash panel cover on the platform codes listed below (8R and 83). With the battery earth off, the dash cover comes out, the 3-position carrier ahead of it is unclipped, and the two heavy feed wires on the 4-position carrier are marked before anything is undone. One wire comes off the front, then the carrier is released from its spring and swung out of its mounting to reach the second wire at the back. After that the fuse holder unclips, relays and control units pull out, and the relay carrier presses rearwards out of its holder. Marking those two feed cables is the one step you cannot skip.

12 steps

🧭 Before you start

Disconnect battery earth with ignition off and remove the driver's side dash panel cover. Detach the 3-position carrier, mark wires 1 and 2, undo the first, swing the 4-position carrier out and disconnect the second at the back. Unclip the fuse holder, pull the relays and control units and release the relay carrier from its holder. Install in reverse and reconnect the battery, following the extra steps on high-voltage vehicles.

Fits: Audi Q5 (8R, 2008–2017); platform code 83

Don't miss

  • Mark both feed wires before removal so they go back on the right studs.
  • Disconnect battery earth with the ignition off before touching the screw connections.
  • Contact assignment for the carrier is in the current flow diagram; check it before refitting relays.
  • Vehicles with a high-voltage system need their own battery reconnection steps.

Written for this job from the workshop steps below · TorqFix editorial.

📋 Procedure

  1. Disconnect earth cable from battery with ignition switched off .
  2. Remove dash panel cover (driver's side) General body repairs, interior68Shelves / trim panels; Removing and installing dash panel cover (driver's side).
  3. Press retaining springs in direction of (arrow), disengage 3-position relay and fuse carrier (1) and detach.
  4. Before removing, mark electrical wiring (1) and (2) for re-installation.
  5. Unfasten electrical wire (1).
AUDI? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Release retaining spring (arrow A) and swivel 4-position relay and fuse carrier (3) out of mounting (arrow B).
  2. Disconnect electrical wire (2) on back of 4-position relay and fuse carrier.
  3. Unclip fuse holder from relay carrier.
  4. Pull out relays and control units.
  5. Release retaining clips (arrows) and press relay carrier (2) towards rear out of holder (1). [Note: Exact assignment of contacts in 4-position relay and fuse carrier can be found in appropriate current flow diagram .]
  6. Install dash panel cover (driver's side) General body repairs, interior68Shelves / trim panels; Removing and installing dash panel cover (driver's side).
  7. Connect battery. Steps required , vehicles with high-voltage system .

Other AUDI procedures

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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.

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Workshop data on this page last updated 20 Sep 2026.