Audi A4 A/C Evaporator for Sale | OEM Used Aluminum Air Conditioning Evaporator

Description

About the Audi A4 A/C Evaporator

Looking for a replacement Audi A4 A/C evaporator? Part Nests sources OEM used aluminum air conditioning evaporators for Audi A4 compact executive sedan applications. The Audi A4 is Audi’s compact executive sedan, succeeding the Audi 80 / 90 platform (per our Audi 80 Series A/C Condenser and Audi 90 Series A/C Condenser Fan listings) starting with the 1996 model year transition. The A4 has been produced across five primary generations (B5, B6, B7, B8, B9) since 1996. The A/C evaporator is an aluminum heat exchanger mounted inside the HVAC case behind the dash, responsible for absorbing heat from the cabin air as low-pressure refrigerant evaporates – the cooling effect that produces cold air output from the dash vents. Evaporator replacement on an Audi A4 application typically requires substantial HVAC case disassembly and is one of the more labor-intensive A/C service items.

Audi A4 A/C Evaporator Specifications

• Type: Tube-and-fin or laminated parallel-flow aluminum A/C evaporator (varies by generation)
• Material: High-strength aluminum (aluminum alloy tubes and fins for optimal heat transfer and corrosion resistance)
• Function: Absorbs heat from cabin air as low-pressure refrigerant evaporates, producing cold air output
• Location: Inside HVAC case behind dash; access typically requires substantial dash disassembly
• Refrigerant ports: Standard A/C system refrigerant inlet (from expansion valve) and outlet (to compressor); threads and O-ring sealing surfaces inspected
• Drain port: Condensate drain port and tray for water removal from evaporator surface; verified for no obstruction
• Refrigerant compatibility: R-134a (Audi A4 B5 through later B8 production); R-1234yf (latest B8 / B9 production reflecting modern refrigerant transition for environmental standards)
• Mounting: Specific to Audi A4 HVAC case design per generation
• Application: Audi A4 B5 (1996-2001), B6 (2002-2005), B7 (2006-2008), B8 (2009-2016), B9 (2017 plus); specify generation when ordering

Audi A4 Generation Context

• Audi A4 B5 (1996-2001): The first Audi A4 generation; successor to the Audi 80 platform; introduced the modern Audi A4 nameplate
• Audi A4 B6 (2002-2005): The second Audi A4 generation; substantial refresh of the B5 platform
• Audi A4 B7 (2006-2008): The third Audi A4 generation; updated B6-based platform; the B7 platform was also the basis for the legendary RS4 B7 (per our Audi S5 V8 engine listing – the RS4 B7 used the 4.2 FSI V8)
• Audi A4 B8 (2009-2016): The fourth Audi A4 generation; substantial technology and refinement update
• Audi A4 B9 (2017 plus): The fifth Audi A4 generation; current generation with modern infotainment and driver assistance
• Generation-specific evaporator: Each Audi A4 generation has different HVAC case design and different evaporator configuration; cross-generation evaporator interchange is generally NOT possible without substantial modification
• Verify generation when ordering: When ordering an Audi A4 A/C evaporator, specify the model year and generation (B5 / B6 / B7 / B8 / B9) to ensure correct evaporator configuration

A/C Evaporator Function and Failure Patterns

• System position: The evaporator sits between the expansion valve / orifice tube and the A/C compressor in the refrigerant flow path; low-pressure side
• Cooling mechanism: Low-pressure refrigerant from the expansion valve / orifice tube enters the evaporator and absorbs heat from cabin air as it evaporates from liquid to vapor; the cooled air is then circulated into the cabin by the blower motor
• Condensate generation: The cooling process condenses moisture from the cabin air on the evaporator surface; the condensate drains through the drain port and tube to the exterior of the vehicle
• Common failure modes: Refrigerant leak (tube perforation due to corrosion, formicary corrosion from acidic moisture exposure), drain port obstruction (causing water leak inside cabin), fin damage (reduced cooling efficiency), evaporator surface fouling (musty smell from biological growth)
• Symptoms of evaporator failure: Loss of A/C system refrigerant, water leak from dash area into cabin (drain obstruction), musty A/C odor, reduced cooling capacity, A/C system continuously running without adequate cooling
• Service-intensive replacement: Evaporator replacement on an Audi A4 typically requires substantial HVAC case disassembly including dash removal in many configurations; budget significantly for labor

Audi A/C Parts Cluster Context

The Audi A4 A/C Evaporator (this listing) is part of our broader Audi A/C parts cluster across this batch:

• Audi 4000 Quattro A/C Compressor (predecessor Audi 4000 platform to Audi 80 / A4 lineage)
• Audi 80 Series A/C Condenser (predecessor Audi 80 platform to A4)
• Audi 90 Series A/C Condenser Fan (predecessor Audi 90 platform to A4)
• Audi A8 A/C Wiring Harness (Audi A8 flagship platform)
• This listing: Audi A4 A/C Evaporator
• Audi A7 A/C Hose (Audi A7 grand touring platform)

For Audi engine context, the Audi S5 V8 engine (our listing) covers the Audi 4.2 FSI V8 performance engine – including the RS4 B7 application that shared the B7 platform with the Audi A4 B7 of this listing’s compatible generations.

Vehicle Compatibility

Why Buy From Part Nests

• Part verified as aluminum air conditioning evaporator for Audi A4 compact executive sedan applications
• Application confirmed (Audi A4 B5 1996-2001, B6 2002-2005, B7 2006-2008, B8 2009-2016, B9 2017 plus – specify generation when ordering)
• Pressure tested for refrigerant leak integrity
• Evaporator core fin condition documented (no significant fin damage or crush)
• Tube and fin integrity verified (no visible tube damage or perforation)
• Refrigerant ports and fitting threads inspected (no thread damage or cross-threading)
• Drain port and tray verified (no obstruction, proper drainage path)
• Mounting and housing fit verified for Audi A4 specific HVAC case
• R-134a or R-1234yf compatibility verified (varies by Audi A4 generation)
• Free shipping to all 50 states
• 15 day replacement warranty on component defects
• Audi A/C parts experience and Audi A4 generation-specific evaporator knowledge from our support team
• Call (855) 634-4447 to talk through your application and confirm fit.