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Heating / Air Conditioning
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
Porsche 928 Leather Dashboard Ventilation Grille - Windshield Defog Vent Kit
Restore Proper Windshield Defogging and Interior Finish
The Porsche 928 leather dashboard is equipped with dedicated
ventilation grilles that direct airflow toward the windscreen to prevent
fogging and maintain clear visibility. These defog vents are essential
components of the climate control system and interior trim.
Fits:
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
Diagram Ref No 2
Originally supplied by Porsche, this part is now NLA (No Longer Available) and often becomes brittle, cracked or damaged over time. This high-quality reproduction is identical in appearance and function to the original and is manufactured from similar durable plastic material.
The ventilation grille sits within the leather dashboard and allows heated or ambient air to flow directly onto the inside of the windshield.
Its function includes:
- Directing airflow to prevent windshield fogging
- Assisting with defrosting in cold conditions
- Supporting overall climate control efficiency
- Maintaining the clean factory appearance of the dashboard
Without a properly functioning defog vent grille, airflow can be restricted, reducing visibility and affecting interior aesthetics.
Why Porsche 928 Defog Vent Grilles Fail
After decades of heat exposure and UV radiation, original
928 dashboard vents commonly suffer from:
- Plastic cracking or splitting
- Warping due to sun exposure
- Brittleness from ageing materials
- Damage during dashboard reupholstery
- Broken mounting tabs
When restoring or reupholstering a leather dashboard, the original vent grille often cannot be reused due to its fragile condition.
Why You Should Upgrade
You should consider replacing your Porsche 928 dashboard
defog vent grille if:
- You are reupholstering or restoring the dashboard
- The original vent is cracked or faded
- Mounting points are broken
- Airflow to the windshield is reduced
- You want to restore factory-correct interior appearance
Replacing both left and right vent grilles is recommended for consistent fitment, colour matching and symmetrical interior presentation.
This reproduction part ensures:
- Correct airflow performance
- Clean integration into leather dashboards
- OEM-style fit and finish
- Long-term durability compared to aged originals
Perfect for concours restorations, full interior refurbishments or preventative replacement.
Key Benefits at a Glance
- Direct replacement for NLA Porsche part
- Identical appearance to original design
- Manufactured from durable plastic material
- Restores windshield defog airflow
- Suitable for leather dashboard 928 models
- Recommended to replace both sides for best results
- Ideal for restoration and reupholstery projects
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9285523KIT
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92

Fits:
Porsche 911 Turbo 1978-83
Porsche 928 1978-89 *
*Cars upto 1989
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919230550
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92

Fits:
Porsche 911 Turbo 1978-83
Porsche 928 1978-89 *
*Cars upto 1989
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919230550
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Fits:
Porsche 928 1990-95
Car with option:
M637 Club Sport CS
M573 Air Conditioner
M639 Version GT
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919233550
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
Fits:
Porsche 928 1978-91
Click 'Zoom in' for large parts diagram.
Diagram ref no 12
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Related, superseded, cross reference or alternative numbers for comparison.
92812612303
The product you are viewing cross references to these numbers
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Fits:
Porsche 928 1987-95
Click 'Zoom in' for large parts diagram.
Diagram ref no 18
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810211804
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Fits as the main air conditioning compressor in the heating & A/C system, typically mounted on the front of the engine with belt drive. Built to original equipment standards, this compressor delivers the correct displacement and operating pressure for the Porsche 928 climate system, ensuring reliable refrigerant circulation, stable pressures and consistent cabin cooling even in demanding conditions.
Fits:
Porsche 928 1980 - 1992*
* Will not fit 4.5L 928 years 1978-79
This compressor draws refrigerant from the evaporator, compresses it, and pumps it through the condenser so the system can expel heat and deliver cool, conditioned air to the interior. By maintaining the correct refrigerant flow and pressure, it ensures the A/C system can cool the cabin quickly and keep temperatures stable, supporting both comfort and demisting/defrost functions.
A worn or failing A/C compressor can cause poor or no cooling, excessive noise, seized internals, and contamination of the entire A/C system. Left unchecked, failure can damage other components like the condenser, expansion valve or receiver-drier. Replacing the compressor with an OE-match unit restores proper refrigerant circulation, protects the rest of the climate system, and brings back the comfort and refinement expected from a Porsche GT car - especially important on long trips and in warm climates.
When to replace
Consider replacing compressor if:
• The A/C no longer blows cold air or cooling is very weak.
• You hear grinding, rattling or squealing noises from the compressor area.
• There are visible oil/refrigerant leaks from the compressor body or shaft seal.
• The compressor clutch fails to engage, or cycles abnormally.
• The system has suffered an internal compressor failure (metal contamination).
• You’re performing a full A/C system restoration on a classic 928.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92812601071
The product you are viewing cross references to these numbers
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91

Fits:
Porsche 928 1987-92
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
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92812611300
The product you are viewing cross references to these numbers
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
Restore smooth, reliable cooling in your Porsche with this OE Match air-conditioning compressor. Designed to meet original Porsche specifications, this high-quality replacement delivers factory-level performance, efficiency, and durability for your classic Porsche 928. Manufactured to the same form, fit, and function as the genuine part, this compressor ensures consistent refrigerant flow, quiet operation, and excellent long-term reliability. It installs directly with no modifications required, making it the ideal solution for restoring your air-conditioning system to original condition.
Fits:
Porsche 928 1987 - 1992
Diagram ref no 1
Why & When to Replace:
• A/C not cooling properly or blowing warm air
• Compressor clutch not engaging or producing noise
• Refrigerant leaks or visible oil traces on the compressor
• During A/C system overhaul or refrigerant conversion service
Replacing your worn compressor with an OE Match unit ensures reliable cooling, improved efficiency, and extended system life — preserving comfort and performance in your Porsche.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92812611300
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
OE Match expansion valve is a replacement for the original Porsche part, designed for Porsche 928, 964 and 993 models. It regulates the flow of refrigerant into the evaporator, ensuring the correct pressure balance for efficient cooling and reliable performance.
Fits:
Porsche 928 1982-95 M570 / M573
Porsche 964 1989-94 M573
Porsche 993 1995-98 M573
* M570 - Cars with air conditioner with improved efficiency
* M573 - Cars with standard air conditioner
Diagram ref no 35
What this product does:
• Controls refrigerant flow between condenser and evaporator
• Maintains stable pressure for consistent cabin cooling
• Prevents evaporator freeze-up and reduces compressor strain
Location: Installed in the A/C system, between the condenser and evaporator
A worn or clogged expansion valve can cause weak cooling, fluctuating cabin temperatures, or excess strain on the compressor. Replacing expansion valve restores proper cooling efficiency, protects the A/C system, and ensures long-lasting comfort in your Porsche.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92857312305
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
Genuine OEM A/C expansion valve, it controls the flow of refrigerant into the evaporator, ensuring correct pressure balance and consistent cooling performance.
Fits:
Porsche 928 1986 - 1995 M570 / M573
Porsche 964 1989 - 1994 M573
Porsche 993 1995 - 1998 M573
* M570 - Cars with air conditioner with improved efficiency
* M573 - Cars with standard air conditioner
Diagram ref no 35
What this expansion valve does:
• Regulates refrigerant flow between the condenser and evaporator
• Maintains optimal pressure for steady and efficient cabin cooling
• Prevents evaporator freeze-up and helps protect the A/C compressor
Location: Installed in the A/C system, positioned between the condenser and the evaporator.
Over time, expansion valves can clog, stick, or wear out, leading to poor cooling, fluctuating cabin temperatures, or compressor strain. Replacing with a genuine Porsche 92857312305 valve restores factory-level cooling efficiency, system reliability, and passenger comfort.
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92857312305
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- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
This is a genuine Porsche series resistor (part number 928 616 101 00) designed for the HVAC/blower motor circuit in the Porsche 928 series. It’s an essential replacement part used in the heating, ventilation and air-conditioning system.
Fits:
Porsche 928 1989 - 1993
Diagram ref no 37
Part Numbers / References: OE references 928-616-101-00 or superseded 928-618-101-01
What it’s used for:
• It regulates the blower motor speed in the vehicle’s climate control system, allowing your car’s heater or air-conditioning fan to run at the correct speeds (low, medium, high).
• In the classic Porsche 928, this resistor ensures the blower motor receives the correct electrical resistance so that fan speeds are stable and predictable rather than erratic. 928sRus, Inc.
• When this resistor fails, you may experience blower fan only working on one speed (often high), or not working at all - making it impossible to properly control cabin climate.
Why it needs replacing:
• With age, repeated heat cycling and electrical load cause wear on this resistor unit. It can overheat, degrade, or fail, causing loss of fan speed control.
• A faulty resistor can lead to reduced functionality of your HVAC system: blower motor stuck on one speed, no fan at all, or intermittent operation.
• Replacing it with a genuine OEM part restores correct operation, maintains authenticity and reliability of your Porsche.
When to replace it:
• Whenever your blower motor isn’t working correctly - e.g., only high speed works, or no speed control at all.
• During routine HVAC system service or restoration of a classic Porsche 928, especially as these original components age.
• If the resistor shows signs of corrosion, overheating damage or the fan control switch has been replaced without improved function.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92861610100
The product you are viewing cross references to these numbers
- Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Air-conditioner series resistor is designed for the HVAC blower control in the Porsche 928 series. Installed within the climate-control system, this resistor pack provides multiple steps of electrical resistance, enabling the blower motor to run at different fan speeds (low, medium, high). Built to match Porsche’s original specification.
Fits:
Porsche 928 1989 - 1993
Diagram ref no 37
• Position on Vehicle: Within the HVAC unit - typically mounted near the blower motor or inside the footwell dash area, functioning as the speed-control resistor pack for the A/C blower.
• Part Numbers / References: OE references 928-616-101-00 or superseded 928-618-101-01.
• Applications: Suitable when the blower motor is stuck at one speed (typically high only), blower fails on low/medium speeds, or after servicing blower motor or climate control system.
While compact, the A/C blower resistor plays a vital role: degraded or failed resistors commonly cause the blower to be stuck on high only or no low/medium speeds - impacting comfort, defrost performance and cabin ventilation. Replacing with the correct resistor restores full speed control, safer driving (better defrost), improved comfort and avoids fan motor overdrive.
When to replace:
• Blower only runs on high speed or fails at lower speeds
• A/C or heater airflow is weak despite servicing the blower motor
• Blower control selector has no effect or is inconsistent
• You’re servicing or replacing the blower motor or HVAC system in your Porsche 928
Related reference numbers
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92861610100
The product you are viewing cross references to these numbers
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92

Fits:
Porsche 924 / 924S 1976-88
Porsche 928 1987-92
Porsche 944 1982-91
Porsche 968 >>1992
Click 'Zoom in' for large parts diagram.
Diagram Ref No 18.
PLEASE NOTE: the After Market brand does not have the top site glass
Related reference numbers
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94457394300
The product you are viewing cross references to these numbers
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
Fits:
Porsche 924 / 924S 1976-88
Porsche 928 1987-92
Porsche 944 1982-91
Porsche 968 >>1992
Click 'Zoom in' for large parts diagram.
Diagram Ref No 18.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94457394300
The product you are viewing cross references to these numbers
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92

Fits:
Porsche 924 / 924S 1976-88
Porsche 928 1987-92
Porsche 944 1982-91
Porsche 968 >>1992
Click 'Zoom in' for large parts diagram.
Diagram Ref No 18.
PLEASE NOTE: the After Market brand does not have the top site glass
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94457394300
The product you are viewing cross references to these numbers
Porsche Heating & Air Conditioning Parts
Air conditioning and heating are often taken for granted — until they stop working. In a Porsche, comfort and driving enjoyment go hand-in-hand, which makes a properly functioning heating and air conditioning system essential. At Design911, we supply a complete range of AC and heating parts to keep your Porsche’s climate control system working all year round.
From compressors, condensers, and hoses to heating elements, blower motors, and cabin filters, we have everything you need to restore performance and reliability. Whether you drive a classic Porsche or the latest model, our parts are available in both OEM and high-quality aftermarket options, all shipped worldwide.
How Long Does Porsche Air Conditioning Last?
Most manufacturers recommend servicing or regassing your Porsche’s air conditioning every 1–2 years, though some systems may last over 5 years. Even so, routine servicing is important to maintain compressor health and prevent costly failures.
A well-maintained AC system provides:
- Reliable cooling in summer and heating in winter
- Reduced risk of system breakdowns
- Improved air quality inside the cabin
- Increased comfort for driver and passengers
Common Causes of Air Conditioning Failure
When Porsche air conditioning fails, it’s
often due to:
- Low Refrigerant Gas – natural leakage over time reduces cooling efficiency
- Perforated Hoses or Pipes – allowing gas or fluid to escape
- Corroded Condensers – a common cause of AC loss in older vehicles
- Faulty Compressors – leading to complete system failure
These issues are repairable, but costs vary depending on the model and extent of damage. Regular servicing helps catch minor faults before they become major repairs.
How Often Should Heating & AC Be Checked?
To avoid discomfort and costly repairs, have
your Porsche’s heating and air conditioning system checked every 12–24
months. Over time, gas levels naturally decrease, reducing efficiency. If
levels drop too far, you risk:
- Loss of in-cabin cooling/heating
- Increased strain on compressors and other system components
- Expensive repairs from avoidable wear
A service keeps your system in good condition, while a repair addresses specific faults. If major issues are found during a service, we’ll notify you before carrying out any additional work.
Why Choose
Design911 for Porsche Heating & AC Parts?
Shop Porsche Heating & Air Conditioning parts today – from condensers and compressors to hoses and blower motors – and keep your Porsche comfortable in every season.