Removing and installing combination valve for secondary air system (left-side) - vehicles with dual clutch gearbox 0BZ — AUDI
Removing and installing combination valve for secondary air system (left-side) - vehicles with dual clutch gearbox 0BZ on Audi: 13 steps, engines BUJ.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform code 42
- Renewed: gasket
Don't miss
- For better accessibility on R8 Spyder vehicles, detach hose at secondary air pump and not at secondary air combination valve.
- The bolts (1) can be accessed from below.
📐 1 workshop diagram for BUJ
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
- Fit protective covers on bodywork .
- R8 Spyder: Remove service flap 55.
- Remove oil reservoir .
- Remove rear wheel (left-side) Wheels and tyres44.
- Remove bolts (arrows) and detach heat shield (1).
- Detach heat shield sleeve (5).
- Unplug electrical connector (3) and disconnect vacuum hose (2).
- Press release tabs and disconnect secondary air hose (4). [Note: For better accessibility on R8 Spyder vehicles, detach hose at secondary air pump and not at secondary air combination valve.]
- Unscrew bolts (1) and detach combination valve (left-side) for secondary air system. [Note: The bolts (1) can be accessed from below.] [Note: Renew gasket and O-ring.]
- Install rear wheel (left-side) Wheels and tyres44.
- Install oil reservoir .
- Install rear noise insulation 66.
- Install service flap 55.
Ask TorqFix about your Audi BUJ — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.
Ask about your Audi BUJ — free → or sign up free to see the drawingsOther AUDI procedures
- Removing and installing high-pressure pipe – Audi A8 D4 · 1 torque figures
- Removing and installing intake manifold (top section) – Audi
- Measuring radial clearance of camshafts – Audi Q7 · 2 torque figures
- Removing and installing engine compartment cross member - R8 Spyder with manual gearbox/R tronic gearbox 086
- Removing and installing coolant pipes located at centre of vehicle
- 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
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.