Please wait… 
Please wait while we process your order,
do not press the back button… 
Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://d911api.datadial.net/images/schemaLogo.png https://d911api.datadial.net/images/schemaLogo.png +443456003478 https://d911api.datadial.net Facebook Instagram
Porsche specialists based in the UK
Porsche > 991 (911) MK2 2016-2019 > 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19 > Gearbox / Transmission > Transmission Cooling >

Coolant Control Valve / Change Over Valves

Coolant Control Valve / Change Over Valves

Filter by brand
DISPLAYING 1 to 2 (of 2 products)
Regulating valve water cooling. Porsche 981 / 718 / 997.2 / 991 - 9P1317233, 99130757300
4
Regulating valve water cooling. Porsche 981 / 718 / 997.2 / 991
Special Order item
9P1317233
Product Information
Product Information
Regulating valve water cooling. 

porsche

Fits:
Porsche 981 Boxster - 2012 to 2016
Porsche 981 Cayman - 2013 to 2016
Porsche 718 Boxster - 2017 Onwards
Porsche 718 Cayman - 2017 Onwards
Porsche 997.2 - 2009 to 2012
Porsche 991 - 2012 to 2019

Click 'Zoom in' for large parts diagram.
Diagram ref no 4


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Related, superseded, cross reference or alternative numbers for comparison.

9P1317233
9P1317233
99130757300

The product you are viewing cross references to these numbers
Regulating Valve Water Cooling. Porsche 981 / 718 / 997.2 / 991 - 9P1317233, 99130757300 - 173433
2
Regulating Valve Water Cooling. Porsche 981 / 718 / 997.2 / 991
9P1317233/1
Product Information
Product Information
Regulating Valve Water Cooling.
This Regulating Valve Water Cooling is a OE MATCH Porsche component designed to control and regulate coolant flow within the engine’s water cooling system. Acting as a precision valve within the cooling circuit, it ensures that coolant is directed appropriately to maintain optimal engine operating temperatures under varying conditions.

Fits:
  • Porsche Boxster 981 2.7L 2012-16
  • Porsche Boxster 981 S / GTS 3.4L 2012-16
  • Porsche Boxster 981 Spyder 3.8L 2016
  • Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
  • Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
  • Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
  • Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
  • Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
  • Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
  • Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
  • Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
  • Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
  • Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
  • Porsche Boxster Spyder / Sypder RS 718 4.0L 01/2019>>
  • Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>>
  • Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
  • 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 2010-11
  • Porsche 997 MKII Turbo 2010-13
  • Porsche 997 MKII GT2 RS 2011-13
  • Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
  • Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
  • Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
  • Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
  • Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
  • Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
  • Porsche 991.1 R 4.0L (500 Bhp) 2016
  • Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
  • Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
  • Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
  • Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
  • Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
  • Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
  • Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
  • Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
  • Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
  • Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
  • Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
  • Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
  • Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
  • Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
  • Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
  • Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
  • Porsche 991.2 Speedster 4.0L (510Bhp) 2019
  • Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
  • Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
  • Porsche Cayman 2.7L 981 2013-16
  • Porsche Cayman S / GTS 3.4L 981 2013-16
  • Porsche Cayman GT4 3.8L 2015-16
  • Porsche Cayman 718 2.0L Manual (300 Bhp)
  • Porsche Cayman 718 2.0L PDK (300 Bhp)
  • Porsche Cayman S 718 2.5L Manual (350 Bhp)
  • Porsche Cayman S 718 2.5L PDK (350 Bhp)
  • Porsche Cayman T 718 2.0L Manual (300 Bhp)
  • Porsche Cayman T 718 2.0L PDK (300 Bhp)
  • Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
  • Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
  • Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
  • Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
  • Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L  

Diagram Ref No 4

What This Product Does:
  • Regulates coolant flow within the engine cooling system
  • Maintains optimal engine temperature under all driving conditions
  • Directs coolant to different circuits as required
  • Supports efficient engine warm-up and cooling
  • Works with thermostats and other cooling components to balance system performance     


Symptoms Of Wear Or Failure:

  • Engine overheating or temperature fluctuations
  • Engine running too cool (inefficient operation)
  • Coolant leaks around the valve housing
  • Poor heater performance or inconsistent cabin temperature
  • Check engine light related to cooling system faults
  • Reduced engine efficiency due to improper temperature control  

Why Replacement Matters:
  • Restores proper coolant flow and temperature control
  • Prevents overheating and potential engine damage
  • Ensures optimal engine efficiency and fuel economy
  • Protects cooling system components from excessive stress
  • Maintains reliable operation of both engine and heating systems  



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

9P1317233
9P1317233
99130757300

The product you are viewing cross references to these numbers
DISPLAYING 1 to 2 (of 2 products)
Also found on these pages
About Coolant Control Valve / Change Over Valves

Porsche Transmission Coolant Control & Change Over Valves - Intelligent Gearbox Temperature Management

Porsche transmission coolant control valves, also known as change over valves, regulate the flow of coolant to the gearbox and transmission oil cooler. These valves ensure the transmission reaches optimal operating temperature quickly, then maintains stable cooling under load, improving efficiency, shift quality, and long-term gearbox reliability.

Available from Design911, transmission coolant control and change over valves are supplied to OEM standards, making them ideal for preventative maintenance, fault repair, and performance-focused thermal management.

What Do Transmission Coolant Control / Change Over Valves Do?

These valves manage when and how coolant is routed through the transmission cooling circuit.

Core Functions:

  • Regulate coolant flow to the transmission oil cooler
  • Help the gearbox warm up efficiently from cold
  • Prevent over-cooling during light driving conditions
  • Increase cooling during high load or high temperature operation
  • Maintain consistent transmission oil temperature

Proper valve operation ensures balanced thermal control in all driving conditions.

Why Do Transmission Coolant Control Valves Fail?

Transmission coolant control valves operate in harsh thermal environments and are subject to wear over time.

Common Causes of Failure:

  • Internal valve sticking due to coolant contamination
  • Electrical actuator or solenoid failure
  • Seal degradation from heat cycling
  • Coolant leaks caused by cracked housings
  • Age-related plastic fatigue

When these valves fail, transmission temperatures can fluctuate or remain outside optimal ranges.

When Should Transmission Coolant Control Valves Be Replaced?

Porsche transmission coolant control and change over valves should be replaced if any of the following symptoms are present:

  • Transmission overheating or slow warm-up
  • Warning lights or fault codes related to temperature control
  • Inconsistent or harsh gear shifts when hot or cold
  • Coolant leaks around the valve housing
  • During gearbox or cooling system servicing

Early replacement helps prevent overheating, poor shifting, and premature gearbox wear.

Highlights

  • Critical transmission thermal management components
  • Regulates gearbox coolant flow and oil temperature
  • Maintains efficient warm-up and cooling balance
  • OEM-spec reliability for long-term durability
  • Essential for both road and performance driving       

Popular Models