Removing and installing auxiliary heater control unit J364 — AUDI
Removing and installing auxiliary heater control unit J364 on Audi: 13 steps. What to remove, in what order, and what to check after.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi Q7 (4M, 2015–)
- Special tools named: 3094
Don't miss
- (Item 1) can be disregarded.
📋 Procedure
- Switch off ignition (and auxiliary/supplementary heater).
- Remove wheel housing liner (front right) General body repairs, exterior66Wheel housing liners; Removing and installing wheel housing liner (front).
- Clamp off coolant hoses (2 and 4) using hose clamp 3094.
- Loosen hose clip (3) and detach coolant hose. [Note: (Item 1) can be disregarded.]
- Loosen hose clip (1) and detach coolant hose (2).
- Release fasteners and unplug connector (3).
- Move wiring harness (arrows) clear.
- Unplug electrical connector (4).
- Release connection (1) and detach upwards (arrow).
- Remove bolts (2, 4 and 5).
- Detach cover (3) and guide out wiring harness.
- Release fastener (arrow) and unplug electrical connector (1).
- Detach auxiliary heater control unit (2). [Note: Pay attention to correct coding for the vehicle concerned (different functions are stored in the control unit depending on the type of vehicle coded) ("“Guided Fault Finding”").If the auxiliary/supplementary heater or the auxiliary heater control unit J364 is renewed, check the operation of at least one hand-held transmitter and re-adapt all hand-held transmitters if necessary .]
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 starter - vehicles with 2.0 ltr. TDI engine (PR number TH3 or TM4)
- Exploded view - cylinder block (pulley end), vehicles with hydraulic power steering · 1 torque figures
- Removing and installing diagonal strut · 1 torque figures
- Removing and installing track rod ball joint - hydraulic power steering rack
- Removing and installing hydraulic fluid cooler (RS models)
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.