Checking, removing and installing fresh-air intake: Audi R8

🧭 Before you start

Fits: Audi R8 (4S, 2015–)

Don't miss

• Water can enter the fresh air intake if the seal (B) is damaged or not installed correctly. This may result in complaints about odour from the heater and air conditioning unit and/or moisture in the passenger compartment.

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. Switch off ignition.
2. Remove luggage compartment liner (with cowl panel trim) General body repairs, interior70Luggage compartment trim panels; Overview of fitting locations - luggage compartment trim panels.
3. Undo and remove cover of fresh air intake box (A).
4. Remove air duct in fresh air intake (C)Exploded view - fresh air intake of heater and air conditioning unit.
5. Unplug electrical connector to G238/G657Removing and installing air quality sensor G238/humidity sender in fresh air intake duct G657.

6. Remove combi nuts (A).
7. Remove fresh air intake box (B).
8. Check seal (C) on fresh air intake box (B) (for seal with body and with fresh air intake box) for correct installation position and damage.
9. Check that water drain socket (E) is not dirty or damaged and is installed correctly. [Note: Water can enter the fresh air intake if the seal (C) on the fresh air intake box (B) is damaged or not installed correctly. This may result in complaints about odour from the heater and air conditioning unit and/or moisture in the passenger compartment.The water drain socket (E) should be installed as illustrated relative to bulkhead (D).]
10. Start by tightening all combi nuts (A) lightly, then tighten to torque (8 Nm). — 8 Nm (5.9 lb-ft)
11. Install all installation parts in the fresh air intake box (E)Exploded view - fresh air intake of heater and air conditioning unit.
12. Check seal (B) on cover (A) for damage and make sure the foam is secured properly. [Note: Water can enter the fresh air intake if the seal (B) is damaged or not installed correctly. This may result in complaints about odour from the heater and air conditioning unit and/or moisture in the passenger compartment.]
13. Install cowl panel trim (1)General body repairs, exterior50Bulkhead; Exploded view - plenum chamber cover.

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• Removing engine – Audi A8 D3 · 41 torque figures
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