Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLKSWAGEN2003EUROVAN V6-2.8L (AXK)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGHEATER CORESERVICE AND REPAIR
2003 Volkswagen Eurovan V6-2.8L (AXK)
Heater Core: Service and Repair
2003 Volkswagen Eurovan V6-2.8L (AXK)SECTION Service and Repair
Digital Climate Control (Climatronic)
Rear Heater, Servicing
CAUTION!
Before beginning repairs on the electrical system:
- Obtain the anti-theft radio security code.
- Switch the ignition off
- Disconnect the battery Ground (END) strap.
- After reconnecting battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows according to Repair Manual and/or Owner's Manual.
1 - Vent, for rear passenger zone
2 - Cover plate
3 - Gasket
4 - Air distribution housing
5 - Rear Warm Air Fan -V47-
6 - Coolant Pipe
7 - Auxiliary Heater Valve -N172-
8 - Coolant hose
9 - Sliding door footwell insert
10 - Air intake duct
11 - Hose clamp
12 - Coolant hose, return
13 - Coolant hose, supply
14 - Heater core
- Install seals around entire circumference of heater core
NOTE: Always change coolant after Repairs.
15 - Rear Heater Core Temperature Sensor -G154-
- Inserted into heater core
- If sensor -G56- malfunctions, default value of 42 °C (108 °F) is assumed
- Removing
- Remove rear heater core first
16 - Control Module for Warm Air Blower -J350- (rear)
- Function: Controls blower speed of rear warm air fan -V47- with variable ground signal
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.