do not press the back button…
Your Vehicle
Porsche // Cayenne 9YA (E3) 2018-2023 // 9YA Cayenne Coupe Turbo S E-Hybrid V8 4.0L (550Hp) 2020-23
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Fits:
For RHD cars only
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 996 all models 1998 - 2005
Porsche 997.1 all models 2005 - 2008
Porsche 997.2 all models 2009 - 2012
Porsche 987C.1 Cayman 2005 - 2008
Porsche 987C.2 Cayman 2009 - 2012
Diagram ref no 14
What This Product Does
The suction hose carries refrigerant through the low-pressure side of the air-conditioning system. It connects sections of the refrigerant circuit while accommodating movement, vibration and temperature changes during vehicle operation.
Functions
- Transfers refrigerant through the A/C suction circuit
- Helps maintain a sealed path between connected components
- Accommodates normal vibration and movement within the vehicle
- Supports correct refrigerant circulation and cabin cooling
Technical Details
- Manufacturer: Porsche
- Part number: 99657309307
- Earlier references: 99657309303 and 99657309305
- Hose specification: NW16
- Vehicle configuration: right-hand drive (RHD) only
Symptoms of Fault
- Air conditioning becomes warm again after regassing
- Cooling performance gradually declines as refrigerant escapes
- Oily deposits or leak-detection dye appear around the hose or its joints
- Cracking, abrasion or deterioration is visible on the flexible section
- A hissing noise is heard when refrigerant loss is significant
- The system cannot maintain the specified operating pressure
Why Replacement Matters
A leaking suction hose prevents the air-conditioning circuit from retaining refrigerant and pressure. Regassing alone will not provide a lasting repair if the line is damaged. Replacing the faulty hose allows the system to be evacuated, leak-tested and recharged correctly. Associated O-rings, seals and retaining hardware should also be inspected during installation and renewed where required.
FAQs
- Does the air-conditioning system need regassing after installation?
Yes. The refrigerant circuit must be evacuated, vacuum-tested and recharged using suitable A/C servicing equipment. - Can replacing the O-rings alone repair the leak?
This may be possible when the pipe remains sound and leakage is limited to a joint. A cracked, abraded or deteriorated hose requires replacement. - Is this hose suitable for left-hand-drive vehicles?
No. The supplied application is for right-hand-drive cars only. - Why did the system lose cooling again after a regas?
Repeated refrigerant loss normally indicates a leak. The hose, joints and other circuit components should be inspected before recharging the system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99657309309
The product you are viewing cross references to these numbers