Question about 2003 Suzuki Aerio

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I need to replace the heater core in my 2003 suzuki aerio

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If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing

  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
I need to replace the heater core in my 2003 - f74-01.gif The heater housing is disassembled to get to the heater core. Heater Core
  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Posted on Jan 11, 2011

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Component location diagrams for most 2003 Suzuki Aerio cars and light trucks sold in the U.S. from 1990+.
clsk2003aeri003.gifIgnition System Components Location Diagram for 2003 Suzuki Aerio 2.0 L4 GAS
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  • clsk2003aeri010.gifInstrument Panel For Connector Layout Diagram Diagram for 2003 Suzuki Aerio SX 2.0 L4 GAS
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  • clsk2003aeri011.gifInstrument Panel Harness Diagram for 2003 Suzuki Aerio SX 2.0 L4 GAS
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  • Clearance Light Relay
  • clsk2003aeri022.gifFuel System Components Diagram for 2003 Suzuki Aerio SX 2.0 L4 GAS
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  • Fuel Pump Relay
  • Fuel Tank Pressure Sensor
  • EVAP Canister
  • Fuel Tank Pressure Control Valve
  • Fuel Filler Cap
  • clsk2003aeri027.gifFloor For Single Unit Parts Diagram for 2003 Suzuki Aerio 2.0 L4 GAS
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  • Wheel Speed Sensor
  • ABS Control Module
  • G Sensor
  • Air Bag Control Module
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  • clsk2003aeri030.gifInstrument Panel For Ground Point Diagram for 2003 Suzuki Aerio SX 2.0 L4 GAS
    Components on diagram:
  • Instrument Panel Ground Points
  • clsk2003aeri036.gifEngine Compartment For Single Unit Parts Diagram for 2003 Suzuki Aerio 2.0 L4 GAS
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  • Throttle Position Sensor
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  • clsk2003aeri037.gifEngine Compartment Components Diagram for 2003 Suzuki Aerio SX 2.0 L4 GAS
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    1 Answer

    Heater core replacement


    Replacing the heater core can be a pretty big job on some cars, since the dash has to come out. Unfortunately the Aerio is one of those cars. You would be better off taking it to a mechanic you trust and who knows what he's doing.

    Nov 20, 2010 | 2005 Suzuki Aerio

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    heater core most likely leaking check floor vent in center if water in there you need a new core

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