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Buick Fuel Injector Kit

19 items

Fuel injector seal kits contain service pieces for a particular injector and fuel-system design. Compare the injector application, seal position and package contents before choosing a kit. A package for one injector may contain a different combination of rings or other pieces from a package intended for several injectors.

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Standard SK131 Fuel Injector Seal KitStandard SK131 Fuel Injector Seal Kit
StandardPart # SK131
Standard SK131 Fuel Injector Seal Kit
4.451 Reviews
$12.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2015-2015 Chrysler 200, 2015-2015 Ram ProMaster City, 2014-2015 Ford Fusion, 2014-2015 Jeep Cherokee, 2013-2015 Dodge Dart, 2013-2015 Dodge Dart, 2013-2015 Ford Fusion, 2013-2015 Ford Fusion, 2013-2015 Ford Fusion, 2013-2015 Ford Fusion, 2013-2013 Ford C-Max, 2013-2013 Lincoln MKZ, 2012-2013 Nissan NV1500, 2012-2013 Nissan NV2500, 2012-2013 Nissan NV3500, 2011-2012 Lincoln MKZ, 2011-2012 Ram 1500, 2011-2011 Ram Dakota, 2010-2013 Ford Transit Connect, 2010-2012 Ford Fusion
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Vehicle: Buick
Item LocatedUnited States
Quantity2
MaterialRubber
ColorBlack/Green
item #10016UT5
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Standard SK1 Fuel Injector Seal Kit
StandardPart # SK1
Standard SK1 Fuel Injector Seal Kit
4.451 Reviews
$11.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2013-2013 Kia Optima, 2013-2013 Kia Optima, 2013-2013 Kia Optima, 2011-2014 Chrysler 200, 2011-2014 Ford F-150, 2011-2014 Ford F-150, 2011-2013 Kia Optima, 2008-2008 Mini Cooper, 2007-2008 Mini Cooper, 2007-2008 Mini Cooper, 2007-2008 Mini Cooper, 2007-2008 Mini Cooper, 2007-2008 Mini Cooper, 2007-2007 Mini Cooper, 2007-2007 Mini Cooper, 2006-2007 Dodge Caravan, 2006-2006 Kia Rio5, 2005-2011 Kia Rio, 2005-2006 Acura RSX, 2005-2006 Cadillac STS
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Vehicle: Buick
Item LocatedUnited States
Quantity1
MaterialRubber
ColorBrown
item #10016SZ7
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Standard SK134 Fuel Injector Seal Kit
StandardPart # SK134
Standard SK134 Fuel Injector Seal Kit
4.451 Reviews
$20.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2012-2013 Nissan NV2500, 2012-2013 Nissan NV3500, 2010-2012 Nissan Pathfinder, 2008-2013 Lincoln Navigator, 2008-2010 Ford F-250 Super Duty, 2008-2010 Ford F-350 Super Duty, 2008-2008 Lincoln Mark LT, 2008-2008 Nissan Pathfinder, 2007-2014 Ford Expedition, 2007-2010 Cadillac STS, 2007-2010 Ford F-150, 2007-2009 Cadillac SRX, 2007-2009 Cadillac XLR, 2006-2011 Buick Lucerne, 2006-2011 Cadillac DTS, 2006-2009 Ford E-450 Super Duty, 2005-2013 Nissan Armada, 2005-2008 Ford E-150, 2005-2008 Ford E-250, 2005-2005 Ford E-150 Club Wagon
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Vehicle: Buick
Item LocatedUnited States
Quantity16
MaterialRubber
ColorBlack/Green
item #10016VKP
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Standard SK81 Fuel Injector Seal Kit
StandardPart # SK81
Standard SK81 Fuel Injector Seal Kit
4.451 Reviews
$20.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2009-2011 Chevrolet Aveo, 2009-2011 Chevrolet Aveo5, 2005-2005 Chevrolet Monte Carlo, 2004-2005 Chevrolet Impala, 2004-2005 Chevrolet Impala, 2004-2005 Chevrolet Impala, 2004-2005 Pontiac Bonneville, 2004-2004 Chevrolet Monte Carlo, 2001-2005 Buick LeSabre, 2001-2004 Buick Regal, 2001-2003 Pontiac Grand Prix, 2001-2002 Pontiac Grand Prix, 2000-2005 Buick Park Avenue, 2000-2003 Chevrolet Impala, 2000-2003 Chevrolet Monte Carlo, 2000-2003 Pontiac Bonneville, 2000-2002 Chevrolet Camaro, 2000-2002 Pontiac Firebird, 1999-1999 Buick Park Avenue, 1999-1999 Buick Park Avenue
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
Quantity8
MaterialMetal
ColorSilver
item #10016T3X
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Standard SK71 Fuel Injector Seal Kit
StandardPart # SK71
Standard SK71 Fuel Injector Seal Kit
4.451 Reviews
$26.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2010-2010 GMC Yukon XL 1500, 2009-2011 Chevrolet Aveo, 2009-2011 Chevrolet Aveo5, 2009-2010 Chevrolet Colorado, 2009-2010 GMC Canyon, 2009-2009 Cadillac Escalade, 2009-2009 Chevrolet Silverado 1500, 2009-2009 Chevrolet Silverado 1500, 2009-2009 Chevrolet Suburban 1500, 2009-2009 GMC Sierra 1500, 2009-2009 GMC Yukon, 2009-2009 GMC Yukon, 2009-2009 GMC Yukon, 2009-2009 GMC Yukon XL 1500, 2008-2009 Chevrolet Tahoe, 2008-2009 Chevrolet Tahoe, 2008-2009 Hummer H3, 2008-2008 Chevrolet Silverado 1500, 2008-2008 Chevrolet Silverado 1500, 2008-2008 Chevrolet Silverado 1500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
Quantity16
MaterialRubber
ColorBlue/Brown
item #10016UWU
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Standard SK84 Fuel Injector Seal Kit
StandardPart # SK84
Standard SK84 Fuel Injector Seal Kit
4.451 Reviews
$29.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1999-1999 Chevrolet Malibu, 1999-1999 Oldsmobile Alero, 1999-1999 Pontiac Grand Am, 1999-1999 Pontiac Montana, 1998-2000 Chevrolet S10, 1998-2000 GMC Sonoma, 1998-1999 Chevrolet Camaro, 1998-1999 Chevrolet Cavalier, 1998-1999 Chevrolet Monte Carlo, 1998-1999 Pontiac Firebird, 1998-1999 Pontiac Sunfire, 1997-1999 Chevrolet Venture, 1997-1999 Oldsmobile Cutlass, 1997-1999 Pontiac Grand Prix, 1997-1998 Chevrolet Malibu, 1996-1999 Chevrolet Lumina, 1996-1996 Buick Regal, 1995-1995 Chevrolet Cavalier, 1995-1995 Oldsmobile 88, 1995-1995 Pontiac Sunfire
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
QuantityOne Set
MaterialRubber
ColorBlue/Silver
item #10016QKZ
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Standard SK9 Fuel Injector Seal Kit
StandardPart # SK9
Standard SK9 Fuel Injector Seal Kit
4.451 Reviews
$18.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2019-2019 Ford Explorer, 2018-2019 Ford F-150, 2018-2018 Ford Expedition, 2018-2018 Lincoln Continental, 2018-2018 Lincoln Navigator, 2016-2018 Lincoln MKX, 2015-2019 Ford F-150, 2015-2019 Ford Transit-150, 2015-2019 Ford Transit-250, 2015-2019 Ford Transit-350, 2015-2019 Ford Transit-350 HD, 2015-2018 Ford Edge, 2015-2017 Ford Mustang, 2013-2019 Ford Taurus, 2013-2019 Ford Taurus, 2013-2019 Ford Taurus, 2013-2018 Ford Explorer, 2013-2018 Ford Explorer, 2013-2018 Ford Explorer, 2013-2018 Lincoln MKT
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
QuantityOne Set
MaterialEPDM
ColorBrown/White
item #10016V4R
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Standard SK78 Fuel Injector Seal Kit
StandardPart # SK78
Standard SK78 Fuel Injector Seal Kit
4.451 Reviews
$23.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2005-2005 Chevrolet Monte Carlo, 2005-2005 Pontiac Montana, 2004-2006 Buick Rainier, 2004-2005 Buick Rendezvous, 2004-2005 Chevrolet Impala, 2004-2005 Chevrolet Impala, 2004-2005 Chevrolet Impala, 2004-2005 Chevrolet Impala, 2004-2005 Chevrolet Monte Carlo, 2004-2005 Pontiac Bonneville, 2004-2004 Chevrolet Monte Carlo, 2002-2003 Buick Rendezvous, 2002-2003 Isuzu Axiom, 2001-2005 Buick LeSabre, 2001-2005 Buick Park Avenue, 2001-2005 Pontiac Aztek, 2001-2004 Buick Regal, 2001-2003 Isuzu Rodeo Sport, 2001-2003 Pontiac Bonneville, 2001-2003 Pontiac Bonneville
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
Quantity16
MaterialRubber
ColorBlack
item #10016UVU
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Standard SK124 Fuel Injector Seal Kit
StandardPart # SK124
Standard SK124 Fuel Injector Seal Kit
4.451 Reviews
$40.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2017-2019 Chevrolet Malibu, 2016-2016 Chevrolet Malibu, 2015-2015 Chevrolet Malibu, 2014-2015 Cadillac CTS, 2013-2016 Cadillac ATS, 2013-2016 Cadillac ATS, 2013-2014 Chevrolet Malibu, 2013-2014 Chevrolet Malibu, 2011-2017 Buick Regal, 2008-2010 Chevrolet Cobalt, 2008-2010 Chevrolet HHR, 2007-2010 Saturn Sky, 2007-2009 Pontiac Solstice
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
QuantityOne Set
ColorBlack/Blue/Silver
Part interchange
SK124, 2173425, 2-12380, 217-3425, 800-93012, 274849, SKDL93012, 12607242, 
...View more
item #10016QWL
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Standard SK94 Fuel Injector Seal Kit
StandardPart # SK94
Standard SK94 Fuel Injector Seal Kit
4.451 Reviews
$66.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2010-2011 Buick LaCrosse, 2009-2011 Cadillac CTS, 2008-2010 Cadillac STS, 2008-2008 Cadillac CTS
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
QuantityOne Set
Part interchange
SK94, 2173096, 2-12346, 12618798, 217-3096, 800-9280, 274815, SK172, 
...View more
item #10016QRY
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Standard FJ105RP6 Fuel Injector Kit
StandardPart # FJ105RP6
Standard FJ105RP6 Fuel Injector Kit
4.451 Reviews
$537.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1993-1993 Oldsmobile Cutlass Cruiser, 1992-1993 Oldsmobile Achieva, 1992-1993 Pontiac Grand Am, 1991-1994 Chevrolet Cavalier, 1991-1994 Pontiac Sunbird, 1990-1994 Chevrolet Lumina, 1990-1993 Buick Regal, 1990-1993 Chevrolet Beretta, 1990-1993 Chevrolet Corsica, 1990-1993 Oldsmobile Cutlass Supreme, 1990-1993 Pontiac Grand Prix, 1990-1992 Chevrolet Camaro, 1990-1992 Pontiac Firebird, 1990-1990 Chevrolet Celebrity, 1989-1993 Buick Century, 1989-1993 Buick Skylark, 1989-1993 Oldsmobile Cutlass Ciera, 1989-1992 Oldsmobile Cutlass Cruiser, 1989-1991 Oldsmobile Cutlass Calais, 1989-1989 Oldsmobile Cutlass Supreme
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
Quantity6
ColorBlack
Part interchange
FJ105RP6, 2-18039-6, 57037-6, FJ105RP6
item #10016V4P
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Standard SK16 Fuel Injector Seal Kit
StandardPart # SK16
Standard SK16 Fuel Injector Seal Kit
4.451 Reviews
$18.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1997-1997 Isuzu Hombre, 1996-1996 Isuzu Hombre, 1995-1997 Pontiac Sunfire, 1994-1997 Chevrolet S10, 1994-1997 GMC Sonoma, 1994-1995 Chevrolet LLV, 1993-1996 Buick Century, 1993-1996 Oldsmobile Cutlass Ciera, 1993-1993 Chevrolet Lumina, 1992-1997 Chevrolet Cavalier, 1992-1996 Chevrolet Beretta, 1992-1996 Chevrolet Corsica
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
Quantity1
MaterialRubber
ColorBlack/Blue
item #10016TGG
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Standard SK14 Fuel Injector Seal Kit
StandardPart # SK14
Standard SK14 Fuel Injector Seal Kit
4.451 Reviews
$11.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2015-2015 Ford Transit-150, 2015-2015 Ford Transit-250, 2015-2015 Ford Transit-350, 2015-2015 Ford Transit-350 HD, 2013-2014 Ford Explorer, 2013-2014 Ford Explorer, 2013-2014 Ford Explorer, 2013-2013 Ford Explorer, 2013-2013 Kia Optima, 2013-2013 Kia Optima, 2013-2013 Kia Optima, 2012-2014 Ford Edge, 2012-2013 Ford Edge, 2012-2012 Ford Explorer, 2011-2014 Chrysler 200, 2011-2014 Ford F-150, 2011-2014 Ford F-150, 2011-2014 Ford F-150, 2011-2014 Lincoln MKX, 2011-2013 Kia Optima
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
Quantity2
MaterialRubber
ColorBlack
item #10016SKK
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Standard SK126 Fuel Injector Seal Kit
StandardPart # SK126
Standard SK126 Fuel Injector Seal Kit
4.451 Reviews
$114.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2015-2015 Cadillac CTS, 2014-2017 Chevrolet Caprice, 2014-2016 Cadillac XTS, 2014-2015 Chevrolet Camaro, 2014-2014 Cadillac CTS, 2014-2014 Cadillac CTS, 2013-2015 Cadillac ATS, 2013-2014 Chevrolet Malibu, 2011-2017 Buick Regal, 2010-2011 Buick LaCrosse, 2010-2011 Cadillac CTS, 2010-2010 Buick LaCrosse
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
QuantityOne Set
ColorAluminum
Part interchange
SK126, 2173399, 2-12382, 217-3399, 800-93014, 274851, SK174, SKDL93014, 
...View more
item #10016TL5
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Standard FJ95RP6 Fuel Injector Kit
StandardPart # FJ95RP6
Standard FJ95RP6 Fuel Injector Kit
4.451 Reviews
$575.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1997-1999 Buick Century, 1997-1999 Chevrolet Malibu, 1997-1997 Oldsmobile Cutlass Supreme, 1995-1999 Chevrolet Lumina, 1995-1999 Chevrolet Monte Carlo, 1995-1999 Oldsmobile Cutlass, 1994-1999 Pontiac Grand Prix, 1994-1998 Buick Skylark, 1994-1998 Oldsmobile Achieva, 1994-1998 Pontiac Grand Am, 1994-1996 Buick Century, 1994-1996 Buick Regal, 1994-1996 Chevrolet Beretta, 1994-1996 Chevrolet Corsica, 1994-1996 Oldsmobile Cutlass Ciera, 1994-1994 Oldsmobile Cutlass Cruiser, 1993-1996 Oldsmobile Cutlass Supreme, 1993-1995 Chevrolet Camaro, 1993-1995 Pontiac Firebird
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
Quantity1
Part interchange
FJ95RP6, 2-18632-6, 57094-6, FJ95RP6
item #10016VK7
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Standard SK57 Fuel Injector Seal Kit
StandardPart # SK57
Standard SK57 Fuel Injector Seal Kit
4.451 Reviews
$13.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2006-2006 Hyundai Accent, 2005-2006 Hyundai Santa Fe, 2005-2006 Hyundai Santa Fe, 2005-2006 Hyundai Tucson, 2005-2005 Ford E-350 Club Wagon, 2005-2005 Ford Escape, 2005-2005 Volkswagen Passat, 2005-2005 Volkswagen Passat, 2004-2005 Ford E-350 Super Duty, 2004-2005 Volkswagen Jetta, 2004-2004 Ford E-350 Super Duty, 2004-2004 Ford F-150 Heritage, 2004-2004 Ford F-150 Heritage, 2004-2004 Volkswagen Beetle, 2003-2006 Hyundai Tiburon, 2003-2006 Nissan Sentra, 2003-2004 Ford E-150, 2003-2004 Ford E-150 Club Wagon, 2003-2004 Ford E-250, 2003-2004 Ford E-350 Club Wagon
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
QuantityOne Set
MaterialRubber
ColorBlack/Brown
item #10016TPQ
Show less
Standard SK133 Fuel Injector Seal Kit
StandardPart # SK133
Standard SK133 Fuel Injector Seal Kit
4.451 Reviews
$17.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2013-2013 Lincoln MKZ, 2012-2013 Nissan NV1500, 2012-2013 Nissan NV2500, 2012-2013 Nissan NV3500, 2011-2012 Lincoln MKZ, 2011-2012 Ram 1500, 2011-2011 Ram Dakota, 2009-2012 Suzuki Equator, 2009-2010 Dodge Challenger, 2009-2010 Dodge Journey, 2009-2010 Volkswagen Routan, 2008-2012 Nissan Pathfinder, 2008-2010 Chrysler Town & Country, 2008-2010 Dodge Avenger, 2008-2010 Dodge Grand Caravan, 2008-2010 Saturn Vue, 2008-2009 Dodge Avenger, 2008-2009 Mitsubishi Raider, 2008-2008 Buick Enclave, 2007-2012 Jeep Liberty
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
QuantityOne Set
MaterialRubber
ColorBlack/Green
item #10016S6K
Show less
Standard SK63 Fuel Injector Seal Kit
StandardPart # SK63
Standard SK63 Fuel Injector Seal Kit
4.451 Reviews
$17.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1996-1996 Chevrolet Express 3500, 1996-1996 Chevrolet G30, 1996-1996 Chevrolet G30, 1996-1996 GMC G3500, 1996-1996 GMC P3500, 1996-1996 GMC Savana 2500, 1996-1996 GMC Savana 3500, 1994-1996 GMC G3500, 1994-1995 Chevrolet G30, 1994-1995 GMC P3500, 1994-1994 Chevrolet P30, 1991-1991 Pontiac Sunbird, 1990-1992 Chevrolet Lumina, 1990-1991 Chevrolet Beretta, 1990-1991 Chevrolet Cavalier, 1990-1991 Chevrolet Corsica, 1990-1991 Pontiac Tempest, 1990-1990 Chevrolet P30, 1990-1990 Pontiac Sunbird, 1990-1990 Pontiac Sunbird
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
Quantity4
MaterialRubber
ColorBlack/White/Teal
item #10016UUK
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Standard SK113 Fuel Injector Seal Kit
StandardPart # SK113
Standard SK113 Fuel Injector Seal Kit
4.451 Reviews
$16.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 2009-2009 Cadillac Escalade, 2009-2009 Chevrolet Colorado, 2009-2009 Chevrolet Silverado 1500, 2009-2009 Chevrolet Silverado 1500, 2009-2009 Chevrolet Suburban 1500, 2009-2009 GMC Canyon, 2009-2009 GMC Sierra 1500, 2009-2009 GMC Yukon, 2009-2009 GMC Yukon, 2009-2009 GMC Yukon, 2009-2009 GMC Yukon XL 1500, 2008-2009 Buick Allure, 2008-2009 Buick LaCrosse, 2008-2009 Chevrolet Tahoe, 2008-2009 Chevrolet Tahoe, 2008-2009 Hummer H3, 2008-2008 Buick Allure, 2008-2008 Buick LaCrosse, 2008-2008 Chevrolet Silverado 1500, 2008-2008 Chevrolet Silverado 1500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Item LocatedUnited States
Quantity2
MaterialRubber
ColorBlack/Blue
item #10016V65
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Choosing A Fuel Injector Seal Kit

Fuel injector seal kits contain service pieces for a particular injector and fuel-system design. Compare the injector application, seal position and package contents before choosing a kit. A package for one injector may contain a different combination of rings or other pieces from a package intended for several injectors.

Some products in this category are small seal kits; other injector-related assemblies can have a different repair scope. Check whether the selected product supplies seals, an injector or a conversion assembly rather than treating every kit as the same part.

What Fuel Injector O-Rings Do

Injector seals close the specified joints in the fuel system. The seals must suit their mounting position and the fuel system in which they are used. A damaged seal or an improperly assembled connection can allow fuel to escape, but a leak may also originate elsewhere.

Inspect the injector, mating surfaces and related connections when the system is serviced. Replacing a seal cannot repair a damaged injector body or a fault in another fuel line.

Planning Injector Seal Replacement

Fuel systems retain pressure, and gasoline direct-injection systems use a high-pressure circuit. Follow the vehicle's pressure-release and service procedures before opening a connection. Keep fuel away from sparks, heat and other ignition sources.

The installation method and any special tools depend on the injector and its seals. Use the specified replacement pieces and inspect the completed repair for leaks according to the service procedure.

Frequently Asked Questions (FAQ)

How many injectors can one seal kit service?

The number varies with the package. Some kits are listed for one injector, while others cover several; the number of pieces is not necessarily the number of injectors covered. Check both the contents and the stated coverage.

Are port-injection and direct-injection seals interchangeable?

The injector and sealing arrangements differ. A seal selected for one design should not be assumed to fit the other because the engine has the same number of cylinders. Match the fuel system and the specified seal position.

Can new injector seals cure a rough idle?

New seals address a sealing problem when the seals are the identified cause. Rough idle can also involve injector operation, fuel delivery or other engine faults, so the symptom needs diagnosis before choosing a seal kit.

What should I do if I smell gasoline near the injectors?

A fuel odor can signal a leak and should be investigated promptly. Stop the engine, avoid ignition sources and arrange inspection before continuing to use the vehicle. The odor alone does not identify which connection is leaking.

Can the upper and lower injector seals be swapped?

Seals can differ by position, dimensions or design. Use the parts specified for each location on the injector rather than swapping them because they look similar. Check the installation procedure for any required new seals.