Removing and installing tyre pressure monitor control unit J502 — AUDI
Removing and installing tyre pressure monitor control unit J502 on Audi: 4 steps, 1 torque figure. What to remove, what to tighten and to how many Nm.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A8 D3 (4E, 2002–2010)
🔩 Torque settings
Values can differ between engine variants — check the code stamped on your block.
| Torque | Fastener / step |
|---|---|
| 1.5 Nm (1.1 lb-ft) | Fit nuts (2) and tighten |
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
- Remove rear seat bench 74.
- Release and unplug connector (1).
- Unscrew nuts (2) and take off tyre pressure monitor control unit J502(3).
- Fit nuts (2) and tighten to 1.5 Nm. — 1.5 Nm (1.1 lb-ft)
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
- Servicing transfer gearbox and rear intermediate drive
- Removing and installing differential (version without differential lock)
- Connecting fault reader V.A.G 1551 (or V.A.G 1552) and selecting functions
- Removing and installing components of ABS system on rear axle, FWD models
- Connecting fault reader V.A.G 1551 and entering address word
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.