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Porsche > 991 (911) MK2 2016-2019 > 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19 > Heating / Air Conditioning >

Compressors

Compressors

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DISPLAYING 1 to 3 (of 3 products)
Air con compressor. Porsche 991.2 / 982 (718) Boxster - 9P1820803B, 9P1820803D
1
Air con compressor. Porsche 991.2 / 982 (718) Boxster
Special Order item
9P1820803D
Product Information
Product Information
Air Con Compressor.



Fits:
Porsche 991.2 Carrera
Porsche 991.2 TURBO
Porsche 982 (718) Boxster

Click 'Zoom in' for large parts diagram.
Diagram ref no 1.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9P1820803D
9P1820803B
9P1820803D

The product you are viewing cross references to these numbers
Air Conditioning Compressor Oil 250ml - PL68 - With UV Technology. Porsche 987 / 997 / 970 / 971 / 981 / 991 / 918 / 95B / 718 / 992 - 8FX351214291, 00004330579, 00004320004
1
Air Conditioning Compressor Oil 250ml - PL68 - With UV Technology. Porsche 987 / 997 / 970 / 971 / 981 / 991 / 918 / 95B / 718 / 992
8FX351214291
Product Information
Product Information
PL68 air conditioning compressor oil - 250ml - with UV technology. 



Fits:
Models with R134A refrigerant

Porsche 987 Boxster 2005-12
Porsche 987 Cayman 2006-12

Porsche 997 Turbo/GT2 2007-13
Porsche 997 GT3 2007-11
Porsche 997.2 Carrera 2009-12

Porsche 970 Panamera 2010-16
Porsche 971 Panamera 2017-24 (excludes hybrid models)

Porsche 957 Cayenne 2007-10
Porsche 958 Cayenne 2011-18
Porsche 9YA Cayenne 2018-24 (excludes hybrid models)

Porsche 981 Boxster 2012-16
Porsche 981 Cayman 2014-16
Porsche 981 Boxster Spyder 2016
Porsche 981 Cayman GT4 2016

Porsche 991.1 Carrera 2012-16
Porsche 991 Turbo 2014-16
Porsche 991 GT3 2014-21

Porsche 918 Spyder 2015

Porsche 95B Macan 2014>>

Porsche 718 (982) Boxster Spyder 2019>>

Porsche 992.1 Carrera 2019-24
Porsche 992.1 Turbo 2020>> 
Porsche 992.1 GT3 2021>> 



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

8FX351214291
8FX351214291
00004330579
00004320004

The product you are viewing cross references to these numbers
Air conditioning compressor. Porsche 991.2 / 982 (718) Boxster / Cayman GT4 Clubsport - 9P1820803B, 9P1820803C, 9P1820803D, 9P1820803DX, 8FK351001241 - ACP439000P, 320033
4
Air conditioning compressor. Porsche 991.2 / 982 (718) Boxster / Cayman GT4 Clubsport
9P1820803D/1
Product Information
Product Information

Mahle air conditioning compressor. 

Fits

  • 991.2 Carrera 2 3.0L (370 Bhp) 2016–19
  • 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016–19
  • 991.2 Carrera 4 3.0L (370 Bhp) 2016–19
  • 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016–19
  • 991.2 Cabriolet 2 3.0L (370 Bhp) 2016–19
  • 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016–19
  • 991.2 Cabriolet 4 3.0L (370 Bhp) 2016–19
  • 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016–19
  • 991.2 Targa 4 3.0L (370 Bhp) 2016–19
  • 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016–19
  • 991.2 Turbo Coupe 3.8L (540 Bhp) 2016–19
  • 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016–19
  • 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016–19
  • 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016–19
  • Boxster 718 2.0L Manual (300 Bhp) 2017>>
  • Boxster 718 2.0L PDK (300 Bhp) 2017>>
  • Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
  • Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
  • Porsche 982 Cayman GT4 Clubsport 2019–2020

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

Diagram: 8.8-33, item 12.

What This Product Does

The compressor pressurises refrigerant vapour and drives its circulation around the air conditioning circuit. This allows the system to transfer heat away from the cabin.

Functions

  • Compresses refrigerant vapour.
  • Feeds pressurised refrigerant towards the condenser.
  • Supports the refrigeration cycle used for cabin cooling.

Technical Details

  • Brand: Mahle.
  • Supplied product reference: 9P1820803B.
  • Compressor reference in the supplied diagram: 9P1820803D.

Symptoms of Fault

  • Vent air remains warm with cooling selected.
  • Rattling or knocking from the compressor area.
  • Oil staining around a leaking compressor seal.
  • Insufficient pressure difference during an air conditioning system test.

These symptoms do not confirm compressor failure alone. Refrigerant loss, condenser damage and electrical faults should also be investigated.


Why Replacement Matters

A compressor with internal wear, seizure or leakage may no longer provide the refrigerant flow needed for cooling. Diagnose the original fault before fitting a replacement, particularly where contamination or inadequate lubrication contributed to failure.


FAQs

  • Will regassing fix the problem?
    A recharge will not repair mechanical compressor damage or an unresolved refrigerant leak. Establish the cause of weak cooling first.
  • Should the oil charge be checked?
    Yes. Confirm the lubricant specification and quantity for the vehicle and replacement compressor; do not assume the supplied oil charge matches the complete system requirement. 
  • Does the system need cleaning after internal failure?
    Inspect for contamination and follow the compressor installation instructions. Some components require replacement rather than flushing, especially where metallic debris is present.


Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9P1820803D
9P1820803B
9P1820803C
9P1820803D
9P1820803DX
8FK351001241

The product you are viewing cross references to these numbers
DISPLAYING 1 to 3 (of 3 products)
Also found on these pages
About Compressors

Porsche Air Conditioning Compressors | Reliable Cooling Power & System Performance

The air conditioning compressor is the heart of your Porsche’s A/C system, responsible for circulating refrigerant and maintaining pressure to deliver cold air efficiently. It compresses the refrigerant gas and sends it through the condenser, ensuring consistent cooling performance and comfort in all driving conditions.

At Design911, we supply high-quality air conditioning compressors engineered to match or exceed original standards. Manufactured from premium materials with precision-balanced internals, our compressors provide smooth, quiet operation and long-term reliability.

Whether you’re replacing a failed unit or restoring your Porsche’s climate system, our compressors ensure efficient cooling, consistent pressure regulation, and dependable operation for years to come.

What Does an Air Conditioning Compressor Do?

The compressor is a key component that maintains the flow of refrigerant through your Porsche’s A/C system.

Core Functions:

  • Compresses and circulates refrigerant gas through the condenser and evaporator.
  • Maintains correct pressure levels for efficient cooling.
  • Ensures steady refrigerant flow for consistent cabin temperature.
  • Supports climate control functions and defrost systems.
  • Provides smooth, quiet operation under all driving conditions.

Without a functioning compressor, the air conditioning system cannot cool effectively, leading to warm air output and reduced performance.

Why Do Air Conditioning Compressors Fail or Wear Out?

Over time, compressors are subject to extreme pressure, heat, and mechanical wear, which can lead to internal or external failures.

Common Causes of Failure Include:

  • Loss of lubrication due to refrigerant leaks.
  • Contamination or moisture in the A/C system.
  • Seized bearings or worn clutch assemblies.
  • Electrical faults in the compressor clutch or relay.
  • Excessive pressure from blocked condensers or expansion valves.

When a compressor fails, symptoms may include warm air from vents, unusual noises, oil or refrigerant leaks, or the A/C system failing to engage.

Why Replace Your Porsche Air Conditioning Compressor?

Replacing a worn or faulty compressor restores proper cooling efficiency, prevents further system damage, and ensures reliable temperature control.

Key Benefits:

  • Restores efficient and consistent air conditioning performance.
  • Prevents system contamination and costly compressor failure.
  • Reduces noise, vibration, and harshness (NVH).
  • Improves refrigerant circulation and cooling response.
  • Compatible with Porsche 911, Cayman, Boxster, Panamera, Macan, and Cayenne models.
  • Ideal for A/C rebuilds, maintenance, or climate control restorations.

When replacing the compressor, it’s recommended to also replace the receiver-drier and flush the system to remove contaminants for optimal performance.

Highlights

  • Precision-engineered Porsche air conditioning compressors.
  • High-efficiency performance with smooth, quiet operation.
  • Designed for reliability under high-pressure conditions.
  • Suitable for both R134a and R1234yf refrigerants (depending on model).
  • Perfect for Porsche A/C servicing, repairs, or full system restoration.
  • Direct-fit replacements for Porsche road and performance vehicles.       

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