Removing and installing exhaust gas temperature sender 4G648 — AUDI
Removing and installing exhaust gas temperature sender 4G648 on Audi: 13 steps, engines CAGA, CAGB, CAGC, CAHA.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A5 Cabriolet (8F), Audi A5 (8T, 2007–2016), Audi A4 B8 (8K, 2007–2015)
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- Risk of accident.Engine and gearbox jackV.A.G 1383 A must remain in position when work is being carried out and must not be left unattended. — Unclip electrical wiring (A) from gearbox and unplug electrical connector (C).
🔧 Engine codes this applies to
📐 38 workshop diagrams for CAGA
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
- Remove rear noise insulation (2)General body repairs, exterior66Noise insulation; Exploded view - noise insulation.
- ⚠ When working on all parts of the exhaust system:Observe safety precautions when working on the exhaust system Safety precautions when working on the exhaust system. — Remove front exhaust pipe .
- Remove torque reaction support .
- Support gearbox using engine and gearbox jackV.A.G 1383 A with gearbox support T10337 attached.
- Remove bolts (arrows) for tunnel cross member.
- Lower engine and gearbox jackV.A.G 1383 A as far as distance (a).
- ⚠ Risk of accident.Engine and gearbox jackV.A.G 1383 A must remain in position when work is being carried out and must not be left unattended. — Unclip electrical wiring (A) from gearbox and unplug electrical connector (C).
- Unclip bracket (B) for exhaust gas temperature sender 4G648 from gearbox.
- Remove exhaust gas temperature sender 4G648(item 1).
- Secure tunnel cross-piece 34Assembly mountings; Exploded view - assembly mountings.
- Install torque reaction support .
- Install front exhaust pipe .
- Install noise insulation (rear) General body repairs, exterior66Noise insulation; Exploded view - noise insulation.
Ask TorqFix about your Audi CAGA — 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 CAGA — free → or sign up free to see the drawingsOther AUDI procedures
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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.