Porsche Cayenne 958 HVAC Heater Core - Used Original Parts

Diagnosis and Common Symptoms

From a workshop perspective, a failing heater core in the Cayenne 958 presents distinct, non-electronic symptoms. The primary fault is either an internal blockage or, more commonly, a leak. Diagnosis begins not with a scan tool, but with sensory checks.

The most definitive indicator is the smell of sweet coolant inside the cabin, which becomes more pronounced when the heat is activated. This is often accompanied by a persistent, greasy film on the interior of the windshield that is difficult to clear with the defroster. A physical inspection may reveal coolant saturation or dampness in the passenger-side footwell carpet, originating from behind the dashboard. Drivers will experience a significant loss of heating performance, sometimes asymmetrically, where one side of the cabin receives warm air and the other blows cold. While this component does not generate fault codes itself, a severe coolant leak will trigger the low coolant level warning on the instrument cluster without any visible leaks in the engine bay.

Introduction

This is a Genuine Porsche heater core for the Cayenne 958 chassis, recovered and verified by our technicians. Each unit undergoes a rigorous pressure test to confirm its integrity, ensuring it is free from leaks and internal blockages. This provides a reliable and cost-effective solution to restore your vehicle's critical cabin heating and windshield defrosting capabilities without the expense of a new part.

Product Details

• Brand: Porsche
• Model Compatibility: Porsche Cayenne (958 Generation, 2011-2018)
• Part Name: HVAC Heater Core / Heat Exchanger
• Condition: Genuine Used (Tested Working)
• Notes: Unit has been professionally flushed and pressure-tested to hold pressure within factory specifications. We strongly recommend installing new O-rings on the inlet/outlet pipes to ensure a perfect, leak-free seal.