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Radiator Coolant Tank Cap RS-527 Compatible with F0rd 6.0 7.3 Powerstroke Explorer F150 F250 F350 Mustang Taurus, Lincoln, Mercury, More, Replace RS527, 9C3Z-8101-B, 9C3Z8101B

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About this item

  • Compatible Vehicles: Compatible with F0rd Crown Victoria 1992-2011, E150 E250 2003-2014, Edge 2007-2014, Excursion 2000-2005, Expedition 1997-2013 2015-2017, Explorer 2002-2005 2011-2019, F150 1997-2017, F250 1997-1999, F250 Super Duty 1999-2016, F350 1997, F350 Super Duty 1999-2017, Flex 2009-2019, Fusion 2006-2013, Mustang 1996-2014, Police Interceptor 2013-2019, Ranger 2001-2011, Taurus 1996-2019, Thunderbird 1994-1997 2002-2005, Windstar 1999-2003
  • Compatible Vehicles: Compatible with Lincoln Mercury Aviator 2003-2005, Continental 1995-2002, LS 2000-2006, MKS 2009-2016, MKT 2010-2019, MKX 2007-2017, MKZ 2007-2012, Mark LT 2006-2008, Mark VIII 1993-1998, Navigator 1998-2017, Town Car 1992-2011, Grand Marquis 1992-2011, Milan 2006-2011, Montego 2005-2007, Monterey 2004-2007, Mountaineer 2002-2005, Sable 1996-2005 2008-2009
  • Part Number: 9C3Z-8101-B, 9C3Z8101B, RS-527, RS527 radiator cap. Please double check the OEM part number of your item before ordering.
  • Features: The radiator cap seals the cooling system, while its dual-valve design regulates internal pressure to ensure optimal radiator performance. Loss of pressure may cause coolant evaporation, leading to boiling and potential engine overheating. Signs of a failing cap include: air intrusion, coolant depletion, visible leaks, reservoir overflow, and engine temperature spikes.
  • Easy Installation: Manufactured to OEM specifications, this aftermarket cap matches or surpasses factory standards for reliability. Remove the old washer reservoir cap, then install the new cap on the washer reservoir. Make sure that it will be fitted and sealed on the washer reservoir to avoid any leaks.


Compatible with F0rd Vehicles:

Crown Victoria 1992-2011

E150 2003-2014

E150 Club Wagon 2003-2005

E150 Econoline 1995-2002

E150 Econoline Club Wagon 1995-2002

E250 2003-2014

E250 Econoline 1995-2002

E350 Club Wagon 2003-2005

E350 Econoline 1995-1998

E350 Econoline Club Wagon 1995-2002

E350 Super Duty 2004-2019

Edge 2007-2014

Excursion 2000-2005

Expedition 1997-2013, 2015-2017

Explorer 2002-2005, 2011-2019

Explorer Sport Trac 2002

F150 1997-2017

F150 Heritage 2004

F250 1997-1999

F250 Super Duty 1999-2016

F350 1997

F350 Super Duty 1999-2017

Five Hundred 2005-2007

Flex 2009-2019

Freestar 2004-2007

Freestyle 2005-2007

Fusion 2006-2013

Ford GT 2005-2006

Mustang 1996-2014

Police Interceptor Sedan 2013-2019

Police Interceptor Utility 2013-2019

Ranger 2001-2011

Special Service Police Sedan 2014-2017

Taurus 1996-2019

Taurus X 2008-2009

Thunderbird 1994-1997, 2002-2005

Windstar 1999-2003

Compatible with Linc0ln Vehicles:

Aviator 2003-2005

Blackwood 2002

Continental 1995-2002

LS 2000-2006

MKS 2009-2016

MKT 2010-2019

MKX 2007-2017

MKZ 2007-2012

Mark LT 2006-2008

Mark VIII 1993-1998

Navigator 1998-2017

Town Car 1992-2011

Zephyr 2006

Compatible with Mercury Vehcles:

Cougar 1994-1997

Grand Marquis 1992-2011

Milan 2006-2011

Montego 2005-2007

Monterey 2004-2007

Mountaineer 2002-2005

Sable 1996-2005, 2008-2009

Part Number: 9C3Z-8101-B, 9C3Z8101B , RS-527, RS527 radiator cap

Please carefully check vehicle model we listed in the description to confirm the compatibility.


Abby B.
Reviewed in the United States on March 20, 2025
The radiator tank cover fits perfectly into my F150 and the installation process was as simple as removing the old cover and replacing it with a new one. The seal is very good, there is no leakage problem, recommended for owners who need to replace.
Jason Vital
Reviewed in the United States on March 20, 2025
Good fit, this is a good product for direct replacement, it works perfectly, hopefully it will continue