Removing and installing relay and fuse holder in electronics box — AUDI

🧭 Before you start

Fits: Audi A8 D4 (4H, 2010–2017)

📋 Procedure

1. Disconnect earth cable from battery with ignition switched off: vehicles without high-voltage system , vehicles with high-voltage system .
2. Remove bolts (1, 3) and detach upper longitudinal member (right-side) (2).
3. Remove bolts (arrows) and detach cover (1) for electronics box (plenum chamber, right-side).
4. Unplug electrical connectors (1, 2, 3) and move clear electrical wiring.
5. Release fasteners (arrows) and detach relay carrier with fuse holder (4).

6. Release fastener (5) and detach suppression filter C24(item 6).
7. Disengage engine wiring harness at electronics box (plenum chamber), move clear and place on engine.
8. Release retaining clip (arrow), press out fuse carrier (2) towards rear and disengage from fuse holder (1).
9. Release retaining clip and press off additional fuse holder (2).
10. Release retaining clips (arrows) to pull relay (1) and control units out of relay carriers.
11. Release retaining clips (arrows) and press relay carrier (3) towards rear out of holder (4).
12. Release retaining clip (2) and press connector (1) out of retainer.
13. Install upper longitudinal member General body repairs, exterior50Lock carrier; Exploded view - lock carrier.
14. Connect battery. Steps required: vehicles without high-voltage system , vehicles with high-voltage system .

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 bracket for ancillaries - vehicles with small engine support
• Removing and installing temperature sender before particulate filter G506
• Removing and installing cup holder/storage compartment in centre console (top section)
• Removing and installing storage compartment - version 1, non-smoker vehicle - trim for storage compartment, storage compartment cover (front) and lining mat
• Installing wiring harness repair set for airbags on the backrest · 1 torque figures