Porsche Coolant Hose / Line (RETURN) Left 99710672803
Porsche Part #: 997-106-728-03 (99710672803)
This page covers one exact OEM part number. Every unit we stocked has sold.
We may be able to get another
Used OEM parts are one-of-a-kind. We sometimes get another when we dismantle a matching vehicle, but we can’t say when — browse what’s in stock now:
Other Coolant Hose / Pipe / Line that may fit your vehicle
Coolant / Water Hose (RETURN)
$59.99
Fits 2005–2008 Porsche Boxster / Cayman
Porsche: 99610622215
Coolant / Water Hose (SUPPLY)
$19.99
Fits 2005–2008 Porsche Boxster / Cayman
Porsche: 99610621209
Coolant Breather Hose / Line
$59.99
Fits 2005–2008 Porsche Boxster / Cayman
Porsche: 98710668201
Coolant Breather Line / Hose
$49.99
Fits 2005–2012 Porsche 911 / Boxster / Cayman
Porsche: 99710676702
Coolant Breather Line / Hose
$44.99
Fits 2005–2012 Porsche Boxster / Cayman
Porsche: 98710622701
Coolant Distributor Tube / Line / Hose (SUPPLY)
$47.99
Fits 2005–2012 Porsche 911 / Boxster / Cayman
Porsche: 99710675204
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Outlet coolant hose for Porsche vehicles, OEM part number 99710672803. Located on the left front, this hose is crucial for returning coolant from the engine to the radiator, helping to maintain optimal engine temperatures. This part addresses common issues related to coolant leaks and inefficient engine cooling. Compatible with a range of models including 2013 Porsche 911 Turbo and Turbo S (3.8L H6), 2012 Porsche 911 Carrera series (3.6L and 3.8L H6), and models from 2006 to 2012 including Boxster and Cayman with various engine configurations. Often referred to as engine coolant hose or water outlet hose. Interchangeable with part numbers 99710663904, 99757255500, and others.
Specifications
| Fits Vehicle Model | 911, Boxster, Cayman |
| Fits Vehicle Make | Porsche |
| Porsche Part No | 997-106-728-03 (99710672803) |
| Side | Left |
| Category | Radiator / Coolant |
Compatible Vehicles
Fits 149 vehicle configurations across 1 make, 2005-2012.
Check your specific vehicle before ordering.
This list shows year, make, and model. Some years have multiple trims or
engines that use different parts, and individual listings may have
additional fitment notes (e.g. “with sunroof only”). Review
the full variant list below, or
message us with your VIN
and we’ll confirm the match.
View all 149 vehicle configurations — 52 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2005 | Porsche | 911 | Carrera 4S Convertible | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2005 | Porsche | 911 | Carrera 4S Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2005 | Porsche | 911 | Carrera Convertible | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2005 | Porsche | 911 | Carrera Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2005 | Porsche | 911 | Carrera S Convertible | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2005 | Porsche | 911 | Carrera S Coupe | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2005 | Porsche | 911 | GT2 Coupe | 3.6L Turbo | For Vehicles with Engine Code(s) 9605 |
| 2005 | Porsche | 911 | GT3 Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2005 | Porsche | 911 | Turbo Convertible | 3.6L Turbo | For Vehicles with Engine Code(s) 9605 |
| 2005 | Porsche | 911 | Turbo Coupe | 3.6L Turbo | For Vehicles with Engine Code(s) 9605 |
| 2005 | Porsche | 911 | Turbo S Convertible | 3.6L Turbo | For Vehicles with Engine Code(s) 9605 |
| 2005 | Porsche | 911 | Turbo S Coupe | 3.6L Turbo | For Vehicles with Engine Code(s) 9605 |
| 2005 | Porsche | Boxster | Convertible | 2.7L | |
| 2005 | Porsche | Boxster | S Convertible | 3.2L | |
| 2006 | Porsche | 911 | Carrera 4 Convertible | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2006 | Porsche | 911 | Carrera 4 Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2006 | Porsche | 911 | Carrera 4S Convertible | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2006 | Porsche | 911 | Carrera 4S Coupe | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2006 | Porsche | 911 | Carrera Convertible | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2006 | Porsche | 911 | Carrera Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2006 | Porsche | 911 | Carrera S Convertible | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2006 | Porsche | 911 | Carrera S Coupe | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2006 | Porsche | Boxster | Convertible | 2.7L | |
| 2006 | Porsche | Boxster | S Convertible | 3.2L | |
| 2006 | Porsche | Cayman | S Hatchback | 3.4L | |
| 2007 | Porsche | 911 | Carrera 4 Convertible | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2007 | Porsche | 911 | Carrera 4 Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2007 | Porsche | 911 | Carrera 4S Convertible | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2007 | Porsche | 911 | Carrera 4S Coupe | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2007 | Porsche | 911 | Carrera Convertible | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2007 | Porsche | 911 | Carrera Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2007 | Porsche | 911 | Carrera S Convertible | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2007 | Porsche | 911 | Carrera S Coupe | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2007 | Porsche | 911 | GT3 Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2007 | Porsche | 911 | GT3 RS Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2007 | Porsche | 911 | Targa 4S | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2007 | Porsche | 911 | Targa 4 | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2007 | Porsche | 911 | Turbo Coupe | 3.6L Turbo | For Vehicles with Engine Code(s) 9605 |
| 2007 | Porsche | Boxster | Convertible | 2.7L | |
| 2007 | Porsche | Boxster | S Convertible | 3.4L | |
| 2007 | Porsche | Cayman | Hatchback | 2.7L | |
| 2007 | Porsche | Cayman | S Hatchback | 3.4L | |
| 2008 | Porsche | 911 | Carrera 4 Convertible | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2008 | Porsche | 911 | Carrera 4 Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2008 | Porsche | 911 | Carrera 4S Convertible | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2008 | Porsche | 911 | Carrera 4S Coupe | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2008 | Porsche | 911 | Carrera Convertible | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2008 | Porsche | 911 | Carrera Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2008 | Porsche | 911 | Carrera S Convertible | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2008 | Porsche | 911 | Carrera S Coupe | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2008 | Porsche | 911 | GT2 Coupe | 3.6L Turbo | For Vehicles with Engine Code(s) 9605 |
| 2008 | Porsche | 911 | GT3 Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2008 | Porsche | 911 | GT3 RS Coupe | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2008 | Porsche | 911 | Targa 4S | 3.8L | For Vehicles with Engine Code(s) 9701 |
| 2008 | Porsche | 911 | Targa 4 | 3.6L | For Vehicles with Engine Code(s) 9605 |
| 2008 | Porsche | 911 | Turbo Convertible | 3.6L Turbo | For Vehicles with Engine Code(s) 9605 |
| 2008 | Porsche | 911 | Turbo Coupe | 3.6L Turbo | For Vehicles with Engine Code(s) 9605 |
| 2008 | Porsche | Boxster | Convertible | 2.7L | |
| 2008 | Porsche | Boxster | RS 60 Spyder Convertible | 3.4L | |
| 2008 | Porsche | Boxster | S Convertible | 3.4L | |
| 2008 | Porsche | Cayman | Hatchback | 2.7L | |
| 2008 | Porsche | Cayman | S Hatchback | 3.4L | |
| 2009 | Porsche | 911 | Carrera 4 Convertible | 3.6L | |
| 2009 | Porsche | 911 | Carrera 4 Coupe | 3.6L | |
| 2009 | Porsche | 911 | Carrera 4S Convertible | 3.8L | |
| 2009 | Porsche | 911 | Carrera 4S Coupe | 3.8L | |
| 2009 | Porsche | 911 | Carrera Convertible | 3.6L | |
| 2009 | Porsche | 911 | Carrera Coupe | 3.6L | |
| 2009 | Porsche | 911 | Carrera S Convertible | 3.8L | |
| 2009 | Porsche | 911 | Carrera S Coupe | 3.8L | |
| 2009 | Porsche | 911 | GT2 Coupe | 3.6L Turbo | |
| 2009 | Porsche | 911 | Targa 4S | 3.8L | |
| 2009 | Porsche | 911 | Targa 4 | 3.6L | |
| 2009 | Porsche | 911 | Turbo Convertible | 3.6L Turbo | |
| 2009 | Porsche | 911 | Turbo Coupe | 3.6L Turbo | |
| 2009 | Porsche | Boxster | Convertible | 2.9L | |
| 2009 | Porsche | Boxster | S Convertible | 3.4L | |
| 2009 | Porsche | Boxster | S 2 Convertible | 3.4L | |
| 2009 | Porsche | Cayman | Hatchback | 2.9L | |
| 2009 | Porsche | Cayman | S Hatchback | 3.4L | |
| 2010 | Porsche | 911 | Carrera 4 Convertible | 3.6L | |
| 2010 | Porsche | 911 | Carrera 4 Coupe | 3.6L | |
| 2010 | Porsche | 911 | Carrera 4S Convertible | 3.8L | |
| 2010 | Porsche | 911 | Carrera 4S Coupe | 3.8L | |
| 2010 | Porsche | 911 | Carrera Convertible | 3.6L | |
| 2010 | Porsche | 911 | Carrera Coupe | 3.6L | |
| 2010 | Porsche | 911 | Carrera S Convertible | 3.8L | |
| 2010 | Porsche | 911 | Carrera S Coupe | 3.8L | |
| 2010 | Porsche | 911 | GT3 Coupe | 3.8L | For Vehicles with Engine Code(s) 9777 |
| 2010 | Porsche | 911 | Targa 4S | 3.8L | |
| 2010 | Porsche | 911 | Targa 4 | 3.6L | |
| 2010 | Porsche | 911 | Turbo Convertible | 3.8L Turbo | |
| 2010 | Porsche | 911 | Turbo Coupe | 3.8L Turbo | |
| 2010 | Porsche | Boxster | Convertible | 2.9L | |
| 2010 | Porsche | Boxster | S Convertible | 3.4L | |
| 2010 | Porsche | Cayman | Hatchback | 2.9L | |
| 2010 | Porsche | Cayman | S Hatchback | 3.4L | |
| 2011 | Porsche | 911 | Carrera 4 Convertible | 3.6L | |
| 2011 | Porsche | 911 | Carrera 4 Coupe | 3.6L | |
| 2011 | Porsche | 911 | Carrera 4S Convertible | 3.8L | |
| 2011 | Porsche | 911 | Carrera 4S Coupe | 3.8L | |
| 2011 | Porsche | 911 | Carrera Convertible | 3.6L | |
| 2011 | Porsche | 911 | Carrera Coupe | 3.6L | |
| 2011 | Porsche | 911 | Carrera GTS Convertible | 3.8L | |
| 2011 | Porsche | 911 | Carrera GTS Coupe | 3.8L | |
| 2011 | Porsche | 911 | Carrera S Convertible | 3.8L | |
| 2011 | Porsche | 911 | Carrera S Coupe | 3.8L | |
| 2011 | Porsche | 911 | GT2 RS Coupe | 3.6L Turbo | |
| 2011 | Porsche | 911 | GT3 Coupe | 3.8L | For Vehicles with Engine Code(s) 9777 |
| 2011 | Porsche | 911 | GT3 RS 4.0 Coupe | 4.0L | For Vehicles with Engine Code(s) 9774 |
| 2011 | Porsche | 911 | GT3 RS Coupe | 3.8L | For Vehicles with Engine Code(s) 9777 |
| 2011 | Porsche | 911 | Speedster Convertible | 3.8L | |
| 2011 | Porsche | 911 | Targa 4S | 3.8L | |
| 2011 | Porsche | 911 | Targa 4 | 3.6L | |
| 2011 | Porsche | 911 | Turbo Convertible | 3.8L Turbo | |
| 2011 | Porsche | 911 | Turbo Coupe | 3.8L Turbo | |
| 2011 | Porsche | 911 | Turbo S Convertible | 3.8L Turbo | |
| 2011 | Porsche | 911 | Turbo S Coupe | 3.8L Turbo | |
| 2011 | Porsche | Boxster | Convertible | 2.9L | |
| 2011 | Porsche | Boxster | S Convertible | 3.4L | |
| 2011 | Porsche | Boxster | Spyder Convertible | 3.4L | |
| 2011 | Porsche | Cayman | Hatchback | 2.9L | |
| 2011 | Porsche | Cayman | S Hatchback | 3.4L | |
| 2012 | Porsche | 911 | Carrera 4 Convertible | 3.6L | |
| 2012 | Porsche | 911 | Carrera 4 Coupe | 3.6L | |
| 2012 | Porsche | 911 | Carrera 4 GTS Convertible | 3.8L | |
| 2012 | Porsche | 911 | Carrera 4 GTS Coupe | 3.8L | |
| 2012 | Porsche | 911 | Carrera 4S Convertible | 3.8L | |
| 2012 | Porsche | 911 | Carrera 4S Coupe | 3.8L | |
| 2012 | Porsche | 911 | Carrera Convertible | 3.6L | |
| 2012 | Porsche | 911 | Carrera Coupe | 3.6L | |
| 2012 | Porsche | 911 | Carrera GTS Convertible | 3.8L | |
| 2012 | Porsche | 911 | Carrera GTS Coupe | 3.8L | |
| 2012 | Porsche | 911 | Carrera S Convertible | 3.8L | |
| 2012 | Porsche | 911 | Carrera S Coupe | 3.8L | |
| 2012 | Porsche | 911 | Targa 4S | 3.8L | |
| 2012 | Porsche | 911 | Targa 4 | 3.6L | |
| 2012 | Porsche | 911 | Turbo Convertible | 3.8L Turbo | |
| 2012 | Porsche | 911 | Turbo Coupe | 3.8L Turbo | |
| 2012 | Porsche | 911 | Turbo S Convertible | 3.8L Turbo | |
| 2012 | Porsche | 911 | Turbo S Coupe | 3.8L Turbo | |
| 2012 | Porsche | Boxster | Convertible | 2.9L | |
| 2012 | Porsche | Boxster | S Convertible | 3.4L | |
| 2012 | Porsche | Boxster | Spyder Convertible | 3.4L | |
| 2012 | Porsche | Cayman | Hatchback | 2.9L | |
| 2012 | Porsche | Cayman | R Hatchback | 3.4L | |
| 2012 | Porsche | Cayman | S Hatchback | 3.4L | |
| 2012 | Porsche | 911 | GT3 Coupe | 3.8L | |
| 2012 | Porsche | 911 | GT3 RS Coupe | 3.8L |