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Heater Control Valve

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Heater Control Valve for Ford Escape 2013-2016 Fusion Fiesta 1.6L TurbochargedHeater Control Valve for Ford Escape 2013-2016 Fusion Fiesta 1.6L Turbocharged
A-Premium®Part # APHCV002
Heater Control Valve for Ford Escape 2013-2016 Fusion Fiesta 1.6L Turbocharged
4.715 Reviews
$50.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2013 - 2016 Ford Escape, 2014 - 2018 Ford Fiesta, 2013 - 2014 Ford Fusion, 2014 - 2016 Ford Transit Connect
Check if this fits your vehicle
Item LocatedUnited States
Quantity1
Installation PositionTo Heater Core
MaterialPlastic, Steel
ColorBlack
Part interchange
902-055, 74908, EHV115, P19001, YG434, YG752, YG780, BM5Z18495A, 
...View more
item #1003EYS6
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Heater Control Valve for Porsche Panamera 2010-2016
A-Premium®Part # APHCV038
Heater Control Valve for Porsche Panamera 2010-2016
4.715 Reviews
$87.99
Quantity Less than 2
Edit ZIP code
2-year warranty
90 days free return
Fits 2010 - 2016 Porsche Panamera
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Item LocatedUnited States
Quantity1
Part interchange
97057222501
item #10019YY2
Note
This item fits the vehicle with Heating Valve.
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Heater Control Valve for Land Rover Range Rover 2011-2012 Sport Utility V8 5.0L
A-Premium®Part # APHCV025
Heater Control Valve for Land Rover Range Rover 2011-2012 Sport Utility V8 5.0L
4.715 Reviews
$38.99
Quantity Less than 2
Edit ZIP code
2-year warranty
90 days free return
Fits 2011 - 2012 Land Rover Range Rover
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Item LocatedUnited States
Quantity1
Part interchange
74932, LR016848, EHV133
item #100250R0
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HVAC Heater Control Valve for Ford Mustang Escort Audi A6 S4 Lincoln Continental
A-Premium®Part # APHCV034
HVAC Heater Control Valve for Ford Mustang Escort Audi A6 S4 Lincoln Continental
4.715 Reviews
$25.99
Quantity Less than 2
Edit ZIP code
2-year warranty
90 days free return
Fits 1988 - 1989 Audi 80, 1990 - 1992 Audi 80, 1988 - 1989 Audi 90, 1990 - 1991 Audi 90, 1989 - 1994 Audi 100, 1989 - 1989 Audi 200, 1990 - 1991 Audi 200, 1978 - 1988 Audi 5000, 1989 - 1994 Audi 100 Quattro, 1989 - 1989 Audi 200 Quattro, 1990 - 1991 Audi 200 Quattro, 1987 - 1987 Audi 5000 Quattro, 1988 - 1988 Audi 5000 Quattro, 1988 - 1989 Audi 80 Quattro, 1990 - 1992 Audi 80 Quattro, 1988 - 1989 Audi 90 Quattro, 1990 - 1991 Audi 90 Quattro, 1995 - 1997 Audi A6, 1995 - 1997 Audi A6 Quattro, 1981 - 1981 Audi Coupe, 1990 - 1991 Audi Coupe Quattro, 1983 - 1984 Audi Quattro, 1992 - 1994 Audi S4, 1995 - 1995 Audi S6, 1990 - 1994 Audi V8 Quattro, 1986 - 1987 Ford Escort, 1988 - 1988 Ford Escort, 1989 - 1990 Ford Escort, 1991 - 1991 Ford Escort, 1986 - 1988 Ford EXP, 1988 - 1989 Ford Festiva, 1979 - 1980 Ford Mustang, 1977 - 1978 Ford Thunderbird, 1979 - 1980 Ford Thunderbird, 1979 - 1980 Lincoln Continental, 1977 - 1979 Lincoln Mark V, 1980 - 1981 Lincoln Mark VI, 1977 - 1980 Lincoln Versailles, 1977 - 1978 Mercury Cougar, 1979 - 1979 Mercury Cougar, 1980 - 1980 Mercury Cougar, 1986 - 1987 Mercury Lynx
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Item LocatedUnited States
Quantity1
MaterialPlastic, Steel
Part interchange
8211259
item #10015QGR
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HVAC Heater Control Valve for Ford F-150 Expedition 00-02 Excursion 00-05
A-Premium®Part # APHCV047
HVAC Heater Control Valve for Ford F-150 Expedition 00-02 Excursion 00-05
4.715 Reviews
$24.99
Quantity Less than 2
Edit ZIP code
2-year warranty
90 days free return
Fits 2000 - 2005 Ford Excursion, 2000 - 2005 Ford Excursion, 2000 - 2002 Ford Expedition, 2000 - 2002 Ford F-150
Check if this fits your vehicle
Item LocatedUnited States
Quantity1
MaterialPlastic
Part interchange
74621, 19193208, YC3Z18495BA, YC3Z18495BD, 8211236
item #10015DHE
Note
This item fits the Ford Excursion & Expedition without Auxiliary Heater.
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HVAC Heater Control Valve for Mercury Villager Nissan Quest 1994-1999
A-Premium®Part # APHCV039
HVAC Heater Control Valve for Mercury Villager Nissan Quest 1994-1999
4.715 Reviews
$25.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Fits 1994 - 1999 Mercury Villager, 1994 - 1999 Nissan Quest
Check if this fits your vehicle
Item LocatedUnited States
Quantity1
MaterialThermoplastic / Steel
Part interchange
74003, 8211343, F4XY18495B, HV1203C
item #10015K7C
Note
This item does not fit the model with Auxiliary Heater.
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Heater Control Valve for Mercedes-Benz W204 C204 C250 R172 SLK250 2012-2015
A-Premium®Part # APHCV003
Heater Control Valve for Mercedes-Benz W204 C204 C250 R172 SLK250 2012-2015
4.715 Reviews
$71.99
Quantity Less than 2
Edit ZIP code
2-year warranty
90 days free return
Fits 2012 - 2015 Mercedes-Benz C250, 2012 - 2014 Mercedes-Benz C250, 2012 - 2015 Mercedes-Benz SLK250
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Item LocatedUnited States
Quantity1
MaterialPlastic, Steel
ColorBlack
Part interchange
EHV122, 2712030164
item #1003EYTZ
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Heater Control Valve for Dodge Sprinter 2500 3500 2003-2006 Mercedes-Benz 600SL
A-Premium®Part # APHCV023
Heater Control Valve for Dodge Sprinter 2500 3500 2003-2006 Mercedes-Benz 600SL
4.715 Reviews
$64.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Fits 2003 - 2006 Dodge Sprinter 2500, 2003 - 2006 Dodge Sprinter 3500, 1993 - 1993 Mercedes-Benz 600SL, 1994 - 2002 Mercedes-Benz SL600
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Item LocatedUnited States
Quantity1
Part interchange
74919, 0018300684, 5103770AA, EHV118
item #1002545C
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Vemo V20-77-0031 HVAC Heater Control Valve
VemoPart # V20-77-0031
Vemo V20-77-0031 HVAC Heater Control Valve
53 Reviews
$99.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1999-1999 BMW 323i, 1999-1999 BMW 328i, 2000-2000 BMW 323Ci, 2000-2000 BMW 323i, 2000-2000 BMW 328Ci, 2000-2000 BMW 328i, 2000-2000 BMW Z8, 2001-2003 BMW 525i, 2001-2003 BMW 530i, 2001-2003 BMW Z8, 2001-2004 BMW 330Ci, 2001-2004 BMW 330i, 2001-2005 BMW 325i, 2001-2005 BMW 325xi, 2001-2005 BMW 330xi, 2001-2006 BMW 325Ci, 2003-2003 BMW Z8, 2004-2005 BMW X3, 2005-2005 BMW 330Ci, 2005-2005 BMW 330i, 2006-2006 BMW 330Ci, 2006-2006 BMW X3, 2007-2008 BMW 328xi, 2007-2010 BMW 328i, 2009-2010 BMW 328i xDrive, 2009-2010 BMW 335d, 2009-2010 BMW 335i, 2009-2010 BMW 335i xDrive
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Item LocatedUnited States
Quantity1
Part interchange
V20-77-0031, 64118369805, 8369805
item #1001QV4Y
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Heater Control Valve for Volkswagen Polo 13-14 Seat Altea 10-12 Cordoba 06-09
A-Premium®Part # APHCV105
Heater Control Valve for Volkswagen Polo 13-14 Seat Altea 10-12 Cordoba 06-09
4.715 Reviews
$22.99
Quantity Less than 4
Edit ZIP code
2-year warranty
90 days free return
Fits 2010 - 2012 Seat Altea, 2006 - 2009 Seat Cordoba, 2008 - 2012 Seat Leon, 2013 - 2014 Volkswagen Polo
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Item LocatedUnited States
Quantity1
MaterialPlastic
ConditionNew
item #1013DTDR
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Vemo V15-77-1045 HVAC Heater Control Valve
VemoPart # V15-77-1045
Vemo V15-77-1045 HVAC Heater Control Valve
53 Reviews
$249.99
Quantity Less than 2
Edit ZIP code
3-year warranty
90 days free return
Fits 2015-2016 Audi A8 Quattro, 2016-2016 Audi A8 Quattro, 2015-2015 Volkswagen Touareg, 2015-2015 Volkswagen Touareg, 2015-2015 Volkswagen Touareg, 2015-2015 Volkswagen Touareg, 2015-2016 Volkswagen Touareg, 2015-2016 Volkswagen Touareg, 2015-2016 Volkswagen Touareg, 2015-2016 Volkswagen Touareg, 2016-2016 Volkswagen Touareg, 2016-2016 Volkswagen Touareg, 2016-2016 Volkswagen Touareg, 2016-2016 Volkswagen Touareg
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Item LocatedUnited States
Quantity1
Part interchange
V15-77-1045, 059121737R, 059121737AK, 059121737G, 059121737H, 059121737J, 059121737AM
item #1001QWK3
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Vemo V20-77-1018 HVAC Heater Control Valve
VemoPart # V20-77-1018
Vemo V20-77-1018 HVAC Heater Control Valve
53 Reviews
$147.99
Quantity Less than 5
Edit ZIP code
3-year warranty
90 days free return
Fits 2010-2011 BMW 750i, 2010-2012 BMW 535i GT, 2010-2012 BMW 550i GT, 2010-2013 BMW 550i GT xDrive, 2010-2013 BMW 750Li, 2010-2013 BMW 750Li xDrive, 2010-2013 BMW 760Li, 2010-2015 BMW 750i xDrive, 2011-2011 BMW 740i, 2011-2012 BMW 550i, 2011-2013 BMW 535i, 2011-2013 BMW 535i GT xDrive, 2011-2013 BMW 535i xDrive, 2011-2013 BMW 550i xDrive, 2011-2013 BMW 740Li, 2011-2013 BMW Alpina B7, 2011-2013 BMW Alpina B7 xDrive, 2011-2013 BMW Alpina B7L, 2011-2013 BMW Alpina B7L xDrive, 2012-2012 BMW 750i, 2012-2013 BMW 528i, 2012-2013 BMW 640i, 2012-2013 BMW 650i, 2012-2013 BMW 650i xDrive, 2012-2013 BMW 740i, 2012-2013 BMW 750i, 2012-2013 BMW ActiveHybrid 5, 2012-2013 BMW M6, 2012-2016 BMW 528i xDrive, 2013-2013 BMW 535i GT, 2013-2013 BMW 550i, 2013-2013 BMW 550i GT, 2013-2013 BMW 640i Gran Coupe, 2013-2013 BMW 650i Gran Coupe, 2013-2013 BMW 650i xDrive Gran Coupe, 2013-2013 BMW 740Li xDrive, 2013-2013 BMW ActiveHybrid 7, 2013-2013 BMW M5, 2014-2014 BMW 535d, 2014-2014 BMW 535d xDrive, 2014-2014 BMW 535i, 2014-2014 BMW 535i GT, 2014-2014 BMW 535i GT xDrive, 2014-2014 BMW 535i xDrive, 2014-2014 BMW 550i, 2014-2014 BMW 550i GT, 2014-2014 BMW 550i GT xDrive, 2014-2014 BMW 550i xDrive, 2014-2014 BMW 640i, 2014-2014 BMW 640i Gran Coupe, 2014-2014 BMW 640i xDrive, 2014-2014 BMW 640i xDrive Gran Coupe, 2014-2014 BMW 650i, 2014-2014 BMW 650i, 2014-2014 BMW 650i Gran Coupe, 2014-2014 BMW 650i xDrive, 2014-2014 BMW 650i xDrive Gran Coupe, 2014-2014 BMW 740Li, 2014-2014 BMW 740Li xDrive, 2014-2014 BMW 740i, 2014-2014 BMW 750Li, 2014-2014 BMW 750Li xDrive, 2014-2014 BMW 760Li, 2014-2014 BMW ActiveHybrid 5, 2014-2014 BMW ActiveHybrid 7, 2014-2014 BMW Alpina B7, 2014-2014 BMW Alpina B7 xDrive, 2014-2014 BMW Alpina B7L, 2014-2014 BMW Alpina B7L xDrive, 2014-2014 BMW M5, 2014-2014 BMW M6, 2014-2014 BMW M6 Gran Coupe, 2014-2015 BMW 750i, 2014-2016 BMW 528i, 2015-2015 BMW 550i GT, 2015-2015 BMW 740Ld xDrive, 2015-2015 BMW 740Li, 2015-2015 BMW 740Li xDrive, 2015-2015 BMW 740i, 2015-2015 BMW 750Li, 2015-2015 BMW 750Li xDrive, 2015-2015 BMW 760Li, 2015-2015 BMW ActiveHybrid 5, 2015-2015 BMW ActiveHybrid 7, 2015-2015 BMW Alpina B7, 2015-2015 BMW Alpina B7 xDrive, 2015-2015 BMW Alpina B7L, 2015-2015 BMW Alpina B7L xDrive, 2015-2016 BMW 535d, 2015-2016 BMW 535d xDrive, 2015-2016 BMW 535i, 2015-2016 BMW 535i xDrive, 2015-2016 BMW 550i, 2015-2016 BMW 550i xDrive, 2015-2016 BMW M5, 2015-2016 BMW M6, 2015-2017 BMW 535i GT, 2015-2017 BMW 535i GT xDrive, 2015-2017 BMW 550i GT xDrive, 2015-2017 BMW 640i, 2015-2017 BMW 640i Gran Coupe, 2015-2017 BMW 640i xDrive, 2015-2017 BMW 640i xDrive Gran Coupe, 2015-2017 BMW 650i, 2015-2017 BMW 650i Gran Coupe, 2015-2017 BMW 650i xDrive, 2015-2017 BMW 650i xDrive Gran Coupe, 2015-2017 BMW Alpina B6 xDrive Gran Coupe, 2015-2017 BMW M6 Gran Coupe, 2016-2016 BMW ActiveHybrid 5, 2017-2017 BMW M6
Check if this fits your vehicle
Item LocatedUnited States
Quantity1
Part interchange
V20-77-1018, 64219310349, 64539119164, 4271156, 64114271156, 9119164, 9310349
item #1001QWXC
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HVAC Heater Control Valve for BMW E36 318ti 1995-1996 Z3 1996-2000
A-Premium®Part # APHCV069
HVAC Heater Control Valve for BMW E36 318ti 1995-1996 Z3 1996-2000
4.715 Reviews
$52.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Fits 1995 - 1996 BMW 318ti, 1996 - 2000 BMW Z3
Check if this fits your vehicle
Item LocatedUnited States
Quantity1
MaterialThermoplastic / Steel
Part interchange
74924, 64111387391, 64114383988, 64118369620, 64118375443, 64118391418
item #10013PHL
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Vemo V15-77-0019 HVAC Heater Control Valve
VemoPart # V15-77-0019
Vemo V15-77-0019 HVAC Heater Control Valve
53 Reviews
$61.99
Only 1 item left in stock
Edit ZIP code
3-year warranty
90 days free return
Fits 1997-1997 Volkswagen EuroVan
Check if this fits your vehicle
Item LocatedUnited States
Quantity1
Part interchange
V15-77-0019, 701819809D
item #1001QT5L
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Vemo V20-77-1015 HVAC Heater Control Valve
VemoPart # V20-77-1015
Vemo V20-77-1015 HVAC Heater Control Valve
53 Reviews
$188.99
Only 1 item left in stock
Edit ZIP code
3-year warranty
90 days free return
Fits 1995-1996 BMW 318ti, 1996-1996 BMW Z3, 1997-2000 BMW Z3, 1998-2000 BMW Z3, 1999-2000 BMW Z3, 1999-2000 BMW Z3
Check if this fits your vehicle
Item LocatedUnited States
Quantity1
Part interchange
V20-77-1015, 64118375443, 64111387391, 64114383988, 64118369620, 64118391418, 8375443
item #1001QWVP
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Vemo V30-77-1046 HVAC Heater Control Valve
VemoPart # V30-77-1046
Vemo V30-77-1046 HVAC Heater Control Valve
53 Reviews
$126.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2003-2003 Mercedes-Benz SL55 AMG, 2003-2006 Mercedes-Benz SL500, 2004-2005 Mercedes-Benz SL600, 2005-2006 Mercedes-Benz SLR McLaren, 2005-2009 Mercedes-Benz SL65 AMG, 2007-2009 Mercedes-Benz SL550, 2007-2009 Mercedes-Benz SL600, 2009-2009 Mercedes-Benz SL63 AMG, 2011-2011 Mercedes-Benz SL550, 2011-2011 Mercedes-Benz SL63 AMG, 2011-2011 Mercedes-Benz SL65 AMG, 2012-2012 Mercedes-Benz SL550, 2012-2012 Mercedes-Benz SL63 AMG, 2012-2013 Mercedes-Benz S350, 2014-2014 Mercedes-Benz S63 AMG, 2014-2017 Mercedes-Benz S550, 2015-2016 Mercedes-Benz S65 AMG, 2015-2017 Mercedes-Benz S550e, 2015-2017 Mercedes-Benz S600, 2016-2017 Mercedes-Benz Maybach S600, 2017-2017 Mercedes-Benz Maybach S550, 2017-2017 Mercedes-Benz S63 AMG, 2017-2017 Mercedes-Benz S65 AMG
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Item LocatedUnited States
Quantity1
Part interchange
V30-77-1046, 2308300084, A2308300084
item #1001QTH3
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Heater Control Valve for BMW E60 E61 E63 E65 525i 530i 650i 750i Land Rover
A-Premium®Part # APHCV004
Heater Control Valve for BMW E60 E61 E63 E65 525i 530i 650i 750i Land Rover
4.715 Reviews
$47.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Fits 2004 - 2010 BMW 525i, 2001 - 2003 BMW 525i, 2006 - 2007 BMW 525xi, 1996 - 2000 BMW 528i, 2008 - 2011 BMW 528i, 2009 - 2010 BMW 528i xDrive, 2008 - 2008 BMW 528xi, 2006 - 2010 BMW 530i, 2001 - 2003 BMW 530i, 2006 - 2007 BMW 530xi, 2008 - 2010 BMW 535i, 2009 - 2010 BMW 535i xDrive, 2008 - 2008 BMW 535xi, 2006 - 2010 BMW 550i, 2004 - 2005 BMW 645Ci, 2006 - 2011 BMW 650Ci, 2006 - 2010 BMW 650i, 2002 - 2005 BMW 745i, 2002 - 2002 BMW 745Li, 2003 - 2005 BMW 745Li, 2006 - 2009 BMW 750i, 2006 - 2009 BMW 750Li, 2004 - 2006 BMW 760i, 2003 - 2009 BMW 760Li, 2007 - 2008 BMW Alpina B7, 2006 - 2010 BMW M5, 2000 - 2003 BMW M5, 2007 - 2010 BMW M6, 2006 - 2010 BMW M6, 2002 - 2010 Land Rover Range Rover, 2006 - 2010 Land Rover Range Rover Sport
Check if this fits your vehicle
Item LocatedUnited States
Quantity1
MaterialPlastic, Steel
ColorBlack
Part interchange
EHV100, 74892, 64116906652, 64116931708
item #1003G0Y0
Note
【Note-1】 For 2001-2003 525i/530i parts fit vehicles with manual temperature control, without ATC.
【Note-2】 For 2000-2003 M5, parts fit vehicles without latent accumulator.
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Vemo V20-77-0029 HVAC Heater Control Valve
VemoPart # V20-77-0029
Vemo V20-77-0029 HVAC Heater Control Valve
53 Reviews
$198.99
Quantity Less than 4
Edit ZIP code
3-year warranty
90 days free return
Fits 1997-1998 BMW 528i, 1997-2003 BMW 540i, 1999-2000 BMW 528i, 2000-2000 BMW X5, 2000-2003 BMW M5, 2001-2003 BMW 525i, 2001-2003 BMW 530i, 2001-2003 BMW X5, 2004-2006 BMW X5, 2007-2008 BMW 750Li, 2007-2008 BMW 750i, 2007-2009 BMW M6, 2008-2008 BMW Alpina B7, 2009-2009 BMW 750Li, 2009-2009 BMW 750i
Check if this fits your vehicle
Item LocatedUnited States
Quantity1
Part interchange
V20-77-0029, 64128374995, 2403499615, 64110301939, 64116906652, 64116908294, 64116931708, 64120151694, 
...View more
item #1001QVR5
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ÜRO Parts 4H0121671D HVAC Heater Control Valve
ÜRO PartsPart # 4H0121671D
ÜRO Parts 4H0121671D HVAC Heater Control Valve
4.410 Reviews
$58.99
Only 1 item left in stock
Edit ZIP code
3-year warranty
90 days free return
Fits 2011-2018 Audi A8 Quattro, 2012-2012 Audi A6 Quattro, 2012-2014 Audi A5, 2012-2018 Audi A7 Quattro, 2012-2020 Audi A5 Quattro, 2013-2015 Audi A6 Quattro, 2013-2015 Audi Q7, 2013-2016 Audi allroad, 2013-2018 Audi A4, 2013-2018 Audi A4 Quattro, 2013-2018 Audi Q5, 2013-2018 Audi S6, 2013-2018 Audi S7, 2013-2018 Audi S8, 2014-2018 Audi RS7, 2015-2016 Audi A3, 2015-2018 Audi A3 Quattro, 2015-2018 Audi Q3, 2015-2018 Audi Q3 Quattro, 2015-2018 Audi S3, 2016-2018 Audi A6, 2016-2018 Audi A6 Quattro, 2016-2018 Audi TT Quattro, 2017-2018 Audi A3, 2017-2018 Audi A4 allroad, 2017-2018 Audi Q7, 2018-2018 Audi A5 Sportback, 2015-2015 Volkswagen Golf SportWagen, 2015-2016 Volkswagen Golf, 2015-2018 Volkswagen GTI, 2015-2018 Volkswagen Golf R, 2016-2018 Volkswagen Golf SportWagen, 2017-2018 Volkswagen Golf, 2017-2018 Volkswagen Golf Alltrack, 2018-2018 Volkswagen Atlas
Check if this fits your vehicle
Item LocatedUnited States
Quantity1
MaterialPA6
Part interchange
4H0121671D, 4H0121671D, 4H0121671B, 2020004, 171623, 74906, EHV107, EHV011, 
...View more
item #1000ZEXG
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HVAC Heater Control Valve for BMW E53 X5 2001-2006
A-Premium®Part # APHCV071
HVAC Heater Control Valve for BMW E53 X5 2001-2006
4.715 Reviews
$73.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2001 - 2006 BMW X5
Check if this fits your vehicle
Item LocatedUnited States
Quantity1
MaterialThermoplastic / Steel
Part interchange
74926, 64116920226, 64118379921
item #10013QTT
Note
This item does not fit the model with ATC (Auto Temperature Control).
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How does a heater control valve work in car?

 

A heater control valve is a component in a vehicle's heating and cooling system that plays a crucial role in regulating the flow of hot coolant to the heater core.It acts as a temperature regulator, allowing the driver or passengers to adjust the temperature inside the vehicle.

 

When the heater control valve is closed, it restricts the flow of coolant, preventing hot coolant from circulating through the heater core. This occurs when the heater is turned off or when the temperature control is set to a cooler setting. By limiting the flow of hot coolant, the valve ensures that heated air is not being directed into the cabin, maintaining a comfortable temperature.

 

However, when the temperature control is adjusted to a warmer setting, a signal is sent to the heater control valve, prompting it to open. Opening the valve allows hot coolant from the engine's cooling system to flow into the heater core. As the hot coolant passes through the heater core, it transfers heat to the air that is forced over it. The blower fan then pushes this warmed air into the vehicle's interior through the vents, providing heating to the occupants.

 

Bad heater control valve symptoms

 

When a heater control valve malfunctions, it can lead to several noticeable symptoms:

  1. Insufficient Heat: The heater control valve restricts or blocks hot coolant flow, resulting in a lack of warm air from the vents when the heater is on.
  2. Inconsistent Heating: A faulty heater control valve can cause intermittent heat output, with periods of warm air followed by bursts of cold air.
  3. Coolant Leaks: Over time, the heater control valve may develop leaks, leading to coolant dripping or pooling under the vehicle.
  4. Inability to Adjust Temperature: Malfunctioning heater control valve prevents effective adjustment of the air temperature despite changing the controls.
  5. Overheating Engine: A stuck-open heater control valve can divert hot coolant away from the radiator, potentially causing the engine to overheat.

It's important to address these symptoms promptly to ensure proper functioning of the heating system and prevent potential engine issues.

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