Air conditioning evaporator. Porsche 964 / 993  ❭  96457390100

Air conditioning evaporator by OE Match for Porsche 964 / 993, located within the bulkhead. This component absorbs heat from cabin airflow as refrigerant evaporates.

Fits

• 964 (911) C2 1989–93
• 964 (911) C4 1989–93
• 964 (911) TURBO 3.3L 1991–93
• 964 (911) TURBO 3.6L 1991–93
• 993 (911) C2 1994–97
• 993 (911) C4 1994–97
• 993 (911) C2S 1994–97
• 993 (911) C4S 1994–97
• 993 (911) TURBO 1994–96
• 993 (911) GT2 1994–97
• 993 (911) TURBO S 1994–97

Check fitment for your specific vehicle (model, year, engine) before ordering.

964 — Diagram: 813-05, item 36; Diagram: 813-05, item 37.
993 — Diagram: 813-05, item 34.

What This Product Does

The evaporator is the heat exchanger in the cabin cooling assembly. Refrigerant passing through it takes up heat from the surrounding airflow. The expansion valve controls refrigerant entering the evaporator; it is a separate component and should not be confused with the evaporator itself.

Functions

• Transfers heat from cabin air into the refrigerant circuit.
• Cools air passing through the climate-control assembly.

Technical Details

• Supplied part reference: 96457390100.
• Installation location: inside the bulkhead.

Symptoms of Fault

• Cooling gradually weakens following a refrigerant recharge.
• Vent air remains warm or cabin temperature becomes inconsistent.
• A musty odour develops around the ventilation system.

These symptoms do not establish an evaporator fault on their own. Moisture-related smells may require cleaning rather than replacement, while cooling problems can also originate elsewhere in the refrigerant system.

Why Replacement Matters

A leaking or corrosion-damaged evaporator can allow refrigerant to escape, leaving the air conditioning unable to maintain cabin cooling. Repeated recharging does not repair the underlying leak. Confirming the source before replacing components helps distinguish an evaporator problem from faults involving hoses, the condenser or the expansion valve.

FAQs

• Will a recharge resolve weak cooling?
  It may help temporarily, but recurring refrigerant loss calls for leak diagnosis and repair.
• Should the expansion valve also be renewed?
  Consider its condition while the assembly is accessible. Replacement should follow inspection, rather than assuming both components have failed.
• Which supporting parts need attention?
  Check seals, O-rings and the receiver-drier when planning the repair. If contamination is suspected, assess whether further system cleaning is necessary.