Heat exchanger for high-voltage battery VX63 with refrigerant shut-off valve for high-voltage battery heat exchanger N542 — VW
Heat exchanger for high-voltage battery VX63 with refrigerant shut-off valve for high-voltage battery heat exchanger N542 on VW: factory workshop.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
📋 Procedure
Heat exchanger for high-voltage battery
VX63
with
refrigerant shut-off valve for high-voltage battery heat exchanger
N542
Special tools and workshop equipment required
Torque wrench
V.A.G 1331
Air conditioner service station
VAS 6007A
or later model.
Hose clamps, up to 25 mm
3094
Engine bung set
VAS 6122
Removing
Observe instructions when working on refrigerant circuit
Chapter
.
Observe general warning instructions for work on high voltage system
Chapter
.
Remove bonnet
General body repairs, exterior
Rep. gr.
55
Bonnet; Removing and installing bonnet
.
Note
To prevent the intrusion of moisture, all components of the refrigerant circuit which have been opened must be sealed with suitable plugs.
Clamp off coolant hoses using
hose clamps up to 25 mm
3094
.
WARNING
Risk of scalding.
The cooling system is pressurised. The coolant temperature may be above 100°C.
If necessary, release pressure and reduce temperature before carrying out repairs.
Loosen clamps, and pull off coolant hoses.
WARNING
Danger from escaping pressurised refrigerant!
Freezing of skin and other body parts.
Extract refrigerant and then immediately open refrigerant circuit.
If the refrigerant was extracted more than 10 minutes before the opening of refrigerant circuit, the refrigerant must be extracted again. The pressure in the circuit will increase due to subsequent evaporation.
Extract refrigerant with e.g.
air conditioner service station
VAS 6007A
.
Remove heater and air conditioning unit
Chapter
.
Disconnect connector from
refrigerant shut-off valve for heater and air conditioner unit
N542
.
Unscrew bolts
1 and 3
.
Unscrew nut
2
.
Pull refrigerant lines off
refrigerant shut-off valve for heater and air conditioner unit
N542
.
Remove bolts
1
.
Remove
heat exchanger for high-voltage battery
VX63
.
Installing
Installation is carried out in the reverse order. When installing, note the following:
Note
After installing
heat exchanger for high-voltage battery
VX63
, bleed coolant circuit.
Always renew O-rings.
Tightening torques
Chapter
“
Assembly overview - heat exchanger for high-voltage battery
”
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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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.