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Nitrogen Oxide Sensor

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Standard NOX022 Nitrogen Oxide (NOx) Sensor, Upstream
StandardPart # NOX022
Standard NOX022 Nitrogen Oxide (NOx) Sensor, Upstream
4.814 Reviews
$246.99
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3-year warranty
90 days free return
Fits 2016-2016 Chevrolet Express 2500, 2016-2016 Chevrolet Express 3500, 2016-2016 Chevrolet Express 4500, 2016-2016 Chevrolet Silverado 2500 HD, 2016-2016 Chevrolet Silverado 3500 HD, 2016-2016 GMC Savana 2500, 2016-2016 GMC Savana 3500, 2016-2016 GMC Savana 4500, 2016-2016 GMC Sierra 2500 HD, 2016-2016 GMC Sierra 3500 HD
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Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionUpstream
Part interchange
NOX022, 19330002, DNX1022, DNX022, NOX1022, 12665215
item #100170EH
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Standard NOX049 Nitrogen Oxide (NOx) Sensor, Upstream
StandardPart # NOX049
Standard NOX049 Nitrogen Oxide (NOx) Sensor, Upstream
4.814 Reviews
$217.99
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3-year warranty
90 days free return
Fits 2021-2023 Cadillac Escalade, 2021-2023 Cadillac Escalade ESV, 2021-2023 Chevrolet Suburban, 2021-2023 Chevrolet Tahoe, 2022-2022 Chevrolet Silverado 1500 LTD, 2022-2023 Chevrolet Silverado 1500, 2021-2023 GMC Yukon, 2021-2023 GMC Yukon XL, 2022-2022 GMC Sierra 1500 Limited, 2022-2023 GMC Sierra 1500
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Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionUpstream
Part interchange
NOX049, 40009339, DNX1049, DNX049, NOX1049, 12686784
item #10016X76
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Standard NOX002 Nitrogen Oxide (NOx) Sensor, Upstream
StandardPart # NOX002
Standard NOX002 Nitrogen Oxide (NOx) Sensor, Upstream
4.814 Reviews
$270.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2010-2014 Chevrolet Express 2500, 2010-2014 Chevrolet Express 3500, 2010-2014 Chevrolet Express 4500, 2011-2014 Chevrolet Silverado 2500 HD, 2011-2014 Chevrolet Silverado 3500 HD, 2010-2014 GMC Savana 2500, 2010-2014 GMC Savana 3500, 2010-2014 GMC Savana 4500, 2011-2014 GMC Sierra 2500 HD, 2011-2014 GMC Sierra 3500 HD
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionUpstream
Part interchange
NOX002, 12671387, DNX1002, DNX002, NOX1002, 19256343, 4N-1001, 904-422
item #10017066
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Standard NOX051 Nitrogen Oxide (NOx) Sensor, Upstream
StandardPart # NOX051
Standard NOX051 Nitrogen Oxide (NOx) Sensor, Upstream
4.814 Reviews
$280.99
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3-year warranty
90 days free return
Fits 2020-2021 Chevrolet Silverado 4500 HD, 2020-2021 Chevrolet Silverado 5500 HD, 2020-2021 Chevrolet Silverado 6500 HD
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionUpstream
Part interchange
NOX051, 12708007, DNX1051, DNX051, NOX051
item #10016YK4
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Standard NOX028 Nitrogen Oxide (NOx) Sensor, Upstream
StandardPart # NOX028
Standard NOX028 Nitrogen Oxide (NOx) Sensor, Upstream
4.814 Reviews
$277.99
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3-year warranty
90 days free return
Fits 2019-2022 Chevrolet Colorado, 2020-2021 Chevrolet Silverado 1500, 2022-2022 Chevrolet Silverado 1500, 2019-2022 GMC Canyon, 2020-2021 GMC Sierra 1500, 2022-2022 GMC Sierra 1500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionUpstream
Part interchange
NOX028, 24001898, DNX3028, DNX028, NOX1028, 12694398, 12696463, 55491104, 
...View more
item #10016XY3
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Standard NOX007 Nitrogen Oxide (NOx) Sensor, Upstream
StandardPart # NOX007
Standard NOX007 Nitrogen Oxide (NOx) Sensor, Upstream
4.814 Reviews
$427.99
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3-year warranty
90 days free return
Fits 2018-2019 Chevrolet Silverado 2500 HD, 2018-2019 Chevrolet Silverado 3500 HD, 2018-2019 GMC Sierra 2500 HD, 2018-2019 GMC Sierra 3500 HD
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionUpstream
Part interchange
NOX007, 12718742, DNX1007, 12680215, DNX007, NOX1007, 12680619, V51-72-0296
item #10016XH1
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Standard NOX041 Nitrogen Oxide (NOx) Sensor, Upstream
StandardPart # NOX041
Standard NOX041 Nitrogen Oxide (NOx) Sensor, Upstream
4.814 Reviews
$263.99
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3-year warranty
90 days free return
Fits 2018-2019 Chevrolet Equinox, 2018-2019 GMC Terrain
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Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionUpstream
Part interchange
NOX041, 55515864, DNX1041, DNX041, NOX1041, 55495830, V51-72-0300
item #10016ZK9
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Standard NOX021 Nitrogen Oxide (NOx) Sensor, Downstream
StandardPart # NOX021
Standard NOX021 Nitrogen Oxide (NOx) Sensor, Downstream
4.814 Reviews
$252.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2016-2016 Chevrolet Express 2500, 2016-2016 Chevrolet Express 3500, 2016-2016 Chevrolet Express 4500, 2016-2016 Chevrolet Silverado 2500 HD, 2016-2016 Chevrolet Silverado 3500 HD, 2016-2016 GMC Savana 2500, 2016-2016 GMC Savana 3500, 2016-2016 GMC Savana 4500, 2016-2016 GMC Sierra 2500 HD, 2016-2016 GMC Sierra 3500 HD
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionDownstream
Part interchange
NOX021, 19330003, DNX1021, DNX021, NOX1021, 12665216
item #100170T2
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Standard NOX044 Nitrogen Oxide (NOx) Sensor, Upstream
StandardPart # NOX044
Standard NOX044 Nitrogen Oxide (NOx) Sensor, Upstream
4.814 Reviews
$284.99
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3-year warranty
90 days free return
Fits 2017-2019 Chevrolet Cruze
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Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionUpstream
Part interchange
NOX044, 24001907, DNX1044, DNX044, NOX1044, 55495827, 55498412, 55503927, 
...View more
item #10016VXX
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Standard NOX026 Nitrogen Oxide (NOx) Sensor, Upstream
StandardPart # NOX026
Standard NOX026 Nitrogen Oxide (NOx) Sensor, Upstream
4.814 Reviews
$219.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2020-2022 Chevrolet Silverado 3500 HD, 2020-2023 Chevrolet Silverado 2500 HD, 2020-2023 GMC Sierra 2500 HD, 2020-2023 GMC Sierra 3500 HD
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionUpstream
Part interchange
NOX026, 12708005, DNX3026, DNX026, NOX1026, 12695881
item #10016VZ3
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Standard NOX001 Nitrogen Oxide (NOx) Sensor, Downstream
StandardPart # NOX001
Standard NOX001 Nitrogen Oxide (NOx) Sensor, Downstream
4.814 Reviews
$302.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2010-2014 Chevrolet Express 2500, 2010-2014 Chevrolet Express 3500, 2010-2014 Chevrolet Express 4500, 2011-2014 Chevrolet Silverado 2500 HD, 2011-2014 Chevrolet Silverado 3500 HD, 2010-2014 GMC Savana 2500, 2010-2014 GMC Savana 3500, 2010-2014 GMC Savana 4500, 2011-2014 GMC Sierra 2500 HD, 2011-2014 GMC Sierra 3500 HD
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionDownstream
Part interchange
NOX001, 12671388, DNX1001, DNX001, NOX1001, 12622451, 12669595, 19256344, 
...View more
item #100170C0
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Standard NOX039 Nitrogen Oxide (NOx) Sensor, Upstream
StandardPart # NOX039
Standard NOX039 Nitrogen Oxide (NOx) Sensor, Upstream
4.814 Reviews
$262.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2017-2019 Chevrolet Express 2500, 2017-2019 Chevrolet Express 3500, 2017-2019 GMC Savana 2500, 2017-2019 GMC Savana 3500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionUpstream
Part interchange
NOX039, 24001919, DNX1039, DNX039, NOX1039, 55497831
item #1001705X
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Standard NOX052 Nitrogen Oxide (NOx) Sensor, Downstream
StandardPart # NOX052
Standard NOX052 Nitrogen Oxide (NOx) Sensor, Downstream
4.814 Reviews
$258.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2021-2021 Chevrolet Silverado 5500 HD, 2021-2021 Chevrolet Silverado 6500 HD, 2021-2022 Chevrolet Silverado 4500 HD
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionDownstream
Part interchange
NOX052, DNX1052, DNX052, NOX1052, 12708008
item #10016X20
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Standard NOX056 Nitrogen Oxide (NOx) Sensor, Downstream
StandardPart # NOX056
Standard NOX056 Nitrogen Oxide (NOx) Sensor, Downstream
4.814 Reviews
$242.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2022-2022 Cadillac Escalade, 2022-2022 Cadillac Escalade ESV, 2022-2022 Chevrolet Silverado 1500, 2022-2022 Chevrolet Silverado 1500 LTD, 2022-2022 Chevrolet Suburban, 2022-2022 Chevrolet Tahoe, 2022-2022 GMC Sierra 1500, 2022-2022 GMC Sierra 1500 Limited, 2022-2022 GMC Yukon, 2022-2022 GMC Yukon XL
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionDownstream
Part interchange
NOX056, DNX503, DNX056, NOX056, 12686785, 24000464
item #10016YUR
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Walker Products 1004-1025 Nitrogen Oxide (NOx) Sensor
Walker ProductsPart # 1004-1025
Walker Products 1004-1025 Nitrogen Oxide (NOx) Sensor
4.413 Reviews
$438.99
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3-year warranty
90 days free return
Fits 2014-2016 Alexander Dennis Enviro400, 2014-2020 Alexander Dennis Enviro500, 2016-2018 Alexander Dennis Enviro500 SuperLo, 2018-2020 Alexander Dennis Enviro200, 2014-2023 Autocar LLC. Xpeditor, 2014-2023 Autocar LLC. Xpert, 2014-2023 Autocar LLC. Xspotter On Road, 2016-2016 Autocar LLC. Xspotter Off Road, 2022-2023 Autocar LLC. DC-64, 2023-2023 Autocar LLC. Xspotter Off Road, 2014-2024 Blue Bird All American FE, 2014-2024 Blue Bird All American RE, 2014-2024 Blue Bird Vision School Bus, 2017-2017 Blue Bird SHL All American, 2020-2023 Blue Bird SHL All American, 2014-2014 Capacity Of Texas TJ7000, 2014-2014 Capacity Of Texas TJ9000, 2014-2023 Capacity Of Texas TJ5000, 2014-2023 Capacity Of Texas TJ6500, 2016-2021 Capacity Of Texas Sabre 5, 2016-2022 Capacity Of Texas TJ9000, 2023-2024 Chevrolet LCF 6500XD, 2014-2019 Crane Carrier Low Entry, 2018-2019 Crane Carrier Low Entry Drop Frame, 2017-2017 Dennis Eagle ProView, 2015-2015 Dina Outsider, 2015-2015 Dina Picker, 2015-2020 Dina Linner, 2015-2020 Dina Runner, 2014-2014 El Dorado Transmark XHF, 2014-2018 El Dorado Axess, 2014-2021 El Dorado E-Z Rider II Max, 2014-2023 Emergency One Emergency One, 2015-2015 Ford F-650, 2015-2015 Ford F-750, 2014-2014 Freightliner Columbia, 2014-2014 Freightliner MCL, 2014-2015 Freightliner XB Line, 2014-2016 Freightliner Coronado, 2014-2017 Freightliner XC Lowered Rail, 2014-2018 Freightliner 114SD, 2014-2018 Freightliner 122SD, 2014-2018 Freightliner M2 112, 2014-2022 Freightliner Cascadia, 2014-2022 Freightliner XB Straight Rail, 2014-2023 Freightliner MB Line, 2014-2023 Freightliner MC Line, 2014-2023 Freightliner MT55, 2014-2023 Freightliner S2C, 2014-2023 Freightliner XC Modular Rail, 2014-2023 Freightliner XC Straight Rail, 2014-2024 Freightliner 108SD, 2014-2024 Freightliner B2, 2014-2024 Freightliner M2 106, 2014-2024 Freightliner MT45, 2014-2024 Freightliner XC Raised Rail, 2015-2016 Freightliner XBA, 2017-2017 Freightliner Columbia, 2018-2019 Freightliner XBA, 2018-2023 Freightliner S2RV, 2019-2019 Freightliner Columbia, 2020-2020 Freightliner XBA ARBOC, 2024-2024 Freightliner XB Straight Rail, 2014-2023 Gillig Low Floor, 2015-2018 Grande West 27 Foot, 2015-2022 Grande West 30 Foot, 2016-2019 Grande West 35 Foot, 2021-2021 Grande West 38 Foot, 2022-2022 Grande West 35 Foot, 2022-2024 Hino 198, 2022-2024 Hino 258, 2022-2024 Hino 268, 2022-2024 Hino 338, 2022-2024 Hino 358, 2016-2020 IC Corporation 1300 FBC, 2019-2023 IC Corporation RE Commercial, 2020-2024 IC Corporation RE School Bus, 2023-2024 IC Corporation 1300 FBC, 2014-2017 International 5900i, 2014-2018 International 9900i, 2014-2020 International 4300, 2014-2020 International ProStar, 2014-2024 International LoneStar, 2016-2019 International 4300LP, 2016-2020 International 7300, 2017-2020 International 4400, 2017-2020 International 7400, 2017-2020 International 7500, 2017-2024 International HX620, 2017-2024 International LT625, 2018-2020 International 4700, 2018-2024 International HX520, 2019-2019 International 4400LP, 2019-2024 International HV507, 2019-2024 International HV607, 2019-2024 International MV607, 2020-2022 International MV, 2019-2020 Irizar I6, 2022-2024 Isuzu FTR, 2016-2023 Kalmar Ottawa T2, 2020-2020 Kalmar T2E, 2014-2015 Kenworth T270, 2014-2015 Kenworth T370, 2014-2016 Kenworth C500, 2014-2016 Kenworth T700, 2014-2020 Kenworth T660, 2014-2022 Kenworth T170, 2014-2023 Kenworth T400, 2014-2024 Kenworth K270, 2014-2024 Kenworth K370, 2014-2024 Kenworth T680, 2014-2024 Kenworth T800, 2014-2024 Kenworth T880, 2014-2024 Kenworth W900, 2016-2023 Kenworth T270, 2016-2023 Kenworth T370, 2018-2019 Kenworth C500, 2019-2024 Kenworth W990, 2020-2022 Kenworth KW55, 2020-2022 Kenworth T460, 2021-2024 Kenworth T280, 2022-2024 Kenworth T380, 2022-2024 Kenworth T480, 2023-2023 Kenworth T180, 2017-2017 Kimble Chassis KF3200C, 2017-2019 Lion LionC, 2014-2018 Mack GU5, 2014-2019 Mack GU4, 2019-2019 Mack Granite, 2021-2022 Mack MD6, 2021-2024 Mack MD7, 2024-2024 Mack MD6, 2019-2021 Motor Coach Industries J4500, 2015-2024 New Flyer Xcelsior, 2014-2021 Nova Bus Corporation Low Floor 40, 2014-2014 Peterbilt 220, 2014-2015 Peterbilt 210, 2014-2015 Peterbilt 337, 2014-2015 Peterbilt 388, 2014-2016 Peterbilt 384, 2014-2016 Peterbilt 386, 2014-2017 Peterbilt 382, 2014-2018 Peterbilt 320, 2014-2018 Peterbilt 587, 2014-2022 Peterbilt 325, 2014-2022 Peterbilt 330, 2014-2023 Peterbilt 348, 2014-2024 Peterbilt 365, 2014-2024 Peterbilt 367, 2014-2024 Peterbilt 389, 2014-2024 Peterbilt 567, 2014-2024 Peterbilt 579, 2015-2024 Peterbilt 220, 2016-2023 Peterbilt 337, 2017-2024 Peterbilt 520, 2022-2024 Peterbilt 536, 2022-2024 Peterbilt 537, 2022-2024 Peterbilt 548, 2014-2014 Pierce Mfg. Inc. Arrow XT, 2014-2014 Pierce Mfg. Inc. Dash CF, 2014-2014 Pierce Mfg. Inc. Impel, 2014-2014 Pierce Mfg. Inc. Quantum, 2014-2014 Pierce Mfg. Inc. Saber, 2014-2014 Pierce Mfg. Inc. Velocity, 2014-2014 Spartan Motors K2, 2014-2017 Spartan Motors Mountain Master, 2014-2018 Spartan Motors Metro Star X, 2014-2021 Spartan Motors Gladiator, 2014-2021 Spartan Motors Metro Star, 2014-2024 Spartan Motors K3, 2016-2024 Spartan Motors K2, 2018-2023 Spartan Motors K4, 2021-2021 Spartan Motors Travel Ride III, 2014-2015 Temsa Bus TS30, 2014-2021 Temsa Bus TS35, 2014-2023 Temsa Bus TS45, 2017-2017 Temsa Bus TS30, 2020-2023 Temsa Bus TS30, 2014-2023 Thomas Transit Liner, 2014-2024 Thomas Saf-T-Liner, 2014-2014 Van Hool C2045, 2014-2014 Van Hool T2100, 2014-2017 Van Hool TD925, 2014-2019 Van Hool Commuter Coach CX, 2014-2019 Van Hool Tourist Coach TX, 2016-2021 Van Hool TDX Double Decker Coach, 2014-2023 Volvo VNL, 2014-2017 Western Star 4900EX, 2014-2018 Western Star 4700SB, 2014-2018 Western Star 4700SF, 2014-2018 Western Star 4900FA, 2014-2018 Western Star 4900SA, 2015-2016 Western Star 6900XD
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
ColorMulti-Colored
Part interchange
1004-1025
item #1001LDD4
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Standard NOX055 Nitrogen Oxide (NOx) Sensor, Downstream
StandardPart # NOX055
Standard NOX055 Nitrogen Oxide (NOx) Sensor, Downstream
4.814 Reviews
$389.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2018-2019 Chevrolet Equinox, 2018-2019 GMC Terrain
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionDownstream
Part interchange
NOX055, 55515865, DNX502, DNX055, NOX055, 55501907
item #10016W8H
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Standard NOX019 Nitrogen Oxide (NOx) Sensor, Downstream
StandardPart # NOX019
Standard NOX019 Nitrogen Oxide (NOx) Sensor, Downstream
4.814 Reviews
$645.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2014-2015 Chevrolet Cruze
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionDownstream
Part interchange
NOX019, 12662659, DNX501, DNX019, NOX019, 12641557
item #10016WUW
Show less
Standard NOX027 Nitrogen Oxide (NOx) Sensor, Upstream
StandardPart # NOX027
Standard NOX027 Nitrogen Oxide (NOx) Sensor, Upstream
4.814 Reviews
$267.99
Quantity Less than 2
Edit ZIP code
3-year warranty
90 days free return
Fits 2014-2015 Chevrolet Cruze
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionUpstream
Part interchange
NOX027, 12662658, DNX3027, DNX027, NOX1027, 12641556, V51-72-0301
item #10016X6Z
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Standard NOX005 Nitrogen Oxide (NOx) Sensor, Downstream
StandardPart # NOX005
Standard NOX005 Nitrogen Oxide (NOx) Sensor, Downstream
4.814 Reviews
$241.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2017-2018 Chevrolet Silverado 2500 HD, 2017-2018 Chevrolet Silverado 3500 HD, 2017-2018 GMC Sierra 2500 HD, 2017-2018 GMC Sierra 3500 HD
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionDownstream
Part interchange
NOX005, DNX1005, 12676706, DNX005, NOX1005, 12673517, 12680469, 12718676, 
...View more
item #10016VNW
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Standard NOX054 Nitrogen Oxide (NOx) Sensor, Upstream
StandardPart # NOX054
Standard NOX054 Nitrogen Oxide (NOx) Sensor, Upstream
4.814 Reviews
$388.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2016-2018 Chevrolet Colorado, 2016-2018 GMC Canyon
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Chevrolet
Item LocatedUnited States
Quantity1
Installation PositionUpstream
Part interchange
NOX054, 24000395, DNX1054, DNX054, NOX054, 55491592, 55494551, 55495040, 
...View more
item #10016ZVN
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What does a Nitrogen Oxide sensor do?

A car nitrogen oxide (NOx) sensor is a component that keeps an eye on the levels of nitrogen oxide gases in a vehicle's exhaust system. It measures how much NOx is present in the exhaust gases and sends this information to the engine control unit. This helps the engine control unit make necessary adjustments to things like the air-fuel mixture and ignition timing to ensure the engine is running efficiently and emitting fewer harmful emissions. In a nutshell, the NOx sensor plays a crucial role in ensuring the vehicle meets emission standards and contributes to a cleaner environment.

Are NOx sensors providing accurate readings in all weather and driving conditions?

NOx sensors may have limitations in their functionality and accuracy under certain weather and driving conditions. Factors such as extreme temperatures, high humidity, and certain exhaust gas compositions can potentially impact the performance and accuracy of NOx sensors. For example, at very low or high temperatures, the sensitivity and response time of NOx sensors can be affected, potentially leading to less accurate readings. Furthermore, the presence of other contaminants or substances in the exhaust stream, such as sulfur compounds or particulate matter, can potentially interfere with the sensor's operation, affecting its accuracy.

How to tell if my Nitrogen Oxide NOx sensor is bad?

If you suspect that your NOx (nitrogen oxide) sensor may be faulty or not functioning properly, there are a few signs that can indicate a potential issue:

  • Check engine light: Illumination of the check engine light on the dashboard may indicate a faulty NOx sensor or another emission-related issue.
  • Reduced engine performance: A malfunctioning NOx sensor can lead to decreased engine performance, including power loss, sluggish acceleration, or poor fuel efficiency.
  • Failed emissions test: If your vehicle consistently fails emissions tests or exhibits a significant increase in NOx emissions, it could be due to a faulty NOx sensor.
  • Poor fuel economy: A malfunctioning NOx sensor may result in poor fuel economy without any other apparent issues.

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