/live/media/N1/N1_999871_ANG.JPG)
Nissens 999871 A/C Expansion Valve - Rear
| Brand | Nissens 999871 |
|---|---|
| Position | Rear |
| Material | Aluminum |
| Refrigerant Type | R134 |
| Type | Block |
| Mounting Hardware Included | Yes |
| O-ring Quantity | 4 |
| O-rings Included | Yes |
| Fits | Audi, Porsche, and Volkswagen · 38 vehicles |
OE matching standards. Precision-tested for pressure performance, tightness, opening, and set-point control.
Aluminum construction. Lightweight material with a clean inner finish for reliable flow control.
O-rings included. Comes with sealing rings and mounting bolts whenever applicable.
Cross-references Global Parts Distributors LLC 3411925, Global Parts Distributors LLC 3411963 and UAC EX9770C for the same application. See all 13.
Nissens A/C Expansion Valve for Rear HVAC
The Nissens 999871 is a block-style A/C expansion valve for rear HVAC systems in select Porsche Cayenne, Volkswagen Touareg, and Audi Q7 applications. Built from aluminum and specified for R134 refrigerant systems, it is engineered to regulate refrigerant flow with OE-matching pressure performance and tightness control.
Key Features
- Block-style A/C expansion valve for rear HVAC use
- Aluminum construction for corrosion-resistant service
- Specified for R134 refrigerant systems
- Includes mounting hardware and O-rings where applicable
- Validated for pressure performance, tightness, opening, set-point setting, and internal finish
- OE-matching fit and function for select rear air conditioning systems
Fitment and Application
- Fits 2008-2018 Porsche Cayenne, rear.
- Fits 2003-2006 Porsche Cayenne, rear.
- Fits 2004-2017 Volkswagen Touareg, rear.
- Fits 2007-2015 Audi Q7, rear.
This part cross-references UAC EX9770C and EX9785C for the same application. The Nissens 999871 is also referenced by part numbers used across related OE and aftermarket catalogs for rear HVAC service on Porsche Cayenne, Volkswagen Touareg, and Audi Q7 models.
What It Fixes
- Uneven or weak rear cabin cooling
- Incorrect refrigerant metering at the evaporator
- Expansion valve leakage or poor sealing
- Pressure control issues in the rear A/C circuit
- HVAC performance loss after system service or component replacement
Installation Notes
Verify the vehicle uses an R134 refrigerant system and confirm rear HVAC configuration before installation. Replace the O-rings during service, inspect the mating surfaces, and evacuate and recharge the system to the correct specification after installation. Cleanliness is critical when opening the A/C circuit to prevent contamination and repeat failures.
Quality Assurance
Nissens manufactures thermal expansion valves to strict OE-style standards and tests each unit for pressure performance, sealing, opening behavior, set-point accuracy, and internal finish. The 999871 is built to match the requirements of the original rear HVAC application on Porsche Cayenne, Volkswagen Touareg, and Audi Q7 platforms.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2018 | Porsche | Cayenne | Rear | — |
| 2017 | Porsche | Cayenne | Rear | — |
| 2017 | Volkswagen | Touareg | Rear | — |
| 2016 | Porsche | Cayenne | Rear | — |
| 2016 | Volkswagen | Touareg | Rear | — |
| 2015 | Audi | Q7 | Rear | — |
| 2015 | Porsche | Cayenne | Rear | — |
| 2015 | Volkswagen | Touareg | Rear | — |
| 2014 | Audi | Q7 | Rear | — |
| 2014 | Porsche | Cayenne | Rear | — |
| 2014 | Volkswagen | Touareg | Rear | — |
| 2013 | Audi | Q7 | Rear | — |
| 2013 | Porsche | Cayenne | Rear | — |
| 2013 | Volkswagen | Touareg | Rear | — |
| 2012 | Audi | Q7 | Rear | — |
| 2012 | Porsche | Cayenne | Rear | — |
| 2012 | Volkswagen | Touareg | Rear | — |
| 2011 | Audi | Q7 | Rear | — |
| 2011 | Porsche | Cayenne | Rear | — |
| 2011 | Volkswagen | Touareg | Rear | — |
| 2010 | Audi | Q7 | Rear | — |
| 2010 | Porsche | Cayenne | Rear | — |
| 2010 | Volkswagen | Touareg | Rear | — |
| 2009 | Audi | Q7 | Rear | — |
| 2009 | Porsche | Cayenne | Rear | — |
| 2009 | Volkswagen | Touareg | Rear | — |
| 2008 | Audi | Q7 | Rear | — |
| 2008 | Porsche | Cayenne | Rear | — |
| 2008 | Volkswagen | Touareg | Rear | — |
| 2007 | Audi | Q7 | Rear | — |
| 2007 | Volkswagen | Touareg | Rear | — |
| 2006 | Porsche | Cayenne | Rear | — |
| 2006 | Volkswagen | Touareg | Rear | — |
| 2005 | Porsche | Cayenne | Rear | — |
| 2005 | Volkswagen | Touareg | Rear | — |
| 2004 | Porsche | Cayenne | Rear | — |
| 2004 | Volkswagen | Touareg | Rear | — |
| 2003 | Porsche | Cayenne | Rear | — |
| No rows match your filter. | ||||