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Please, add your first item to the wishlist

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Oxygen Sensor 21556 – NTK

PART#: 21556
NTK

$50.19

In stock

Interchanges
BrandPart #
BWDOS2213
ACDelco213-2821 / 2132821
ACDelco213-4406 / 2134406
DelphiES20012
DENSO Auto Parts234-4564 / 2344564
BWDOS2415
Standard Motor ProductsSG1552
General Motors12634061
General Motors89017722
Bosch15130
CARQUEST75-3687 / 753687
ACDelco213-3137 / 2133137
ACDelco213-2822 / 2132822
ACDelco213-4203 / 2134203
Bosch16088
CARQUEST75-3560 / 753560
General Motors12612430
General Motors12607333
ACDelco213-1573 / 2131573
ACDelco213-1559 / 2131559
Bosch16532
DENSO Auto Parts234-4816 / 2344816
Bosch16454
Bosch16726
Bosch15494
ACDelco213-1695 / 2131695
Bosch16070
CARQUEST75-3683 / 753683
ACDelco213-4407 / 2134407
Bosch15248
Bosch16089
General Motors12584050
CARQUEST75-3561 / 753561
DENSO Auto Parts234-4815 / 2344815
General Motors12567072
Standard Motor ProductsSG1380
Standard Motor ProductsSG1613
Standard Motor ProductsSG1627
BWDOS2385
CARQUEST75-3272 / 753272
DENSO Auto Parts234-4669 / 2344669
General Motors12616125
General Motors12587037
Bosch16717
ACDelco213-3824 / 2133824
CARQUEST75-2994 / 752994
ACDelco213-4553 / 2134553
Standard Motor ProductsSG1582
Fitments
YearMakeModelSubmodelEngineFuel TypePositionNote
2017ChevroletEquinoxLT3.6V6GASDownstream Left
2017ChevroletEquinoxLT3.6V6FLEXDownstream Right
2017ChevroletEquinoxLT3.6V6GASUpstream Left
2017ChevroletEquinoxPremier3.6V6FLEXUpstream Left
2017ChevroletEquinoxLT3.6V6FLEXUpstream Left
2017ChevroletEquinoxPremier3.6V6FLEXDownstream Right
2017ChevroletEquinoxLT3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2017ChevroletEquinoxLT3.6V6FLEXDownstream Left
2017ChevroletEquinoxPremier3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2017ChevroletEquinoxPremier3.6V6GASUpstream RightB1S1; OE Equivalent Design
2017ChevroletEquinoxPremier3.6V6FLEXDownstream Left
2017ChevroletEquinoxPremier3.6V6GASDownstream Right
2017ChevroletEquinoxPremier3.6V6GASDownstream Left
2017ChevroletEquinoxLT3.6V6GASDownstream Right
2017ChevroletEquinoxPremier3.6V6GASUpstream Left
2017ChevroletEquinoxLT3.6V6GASUpstream RightB1S1; OE Equivalent Design
2017GMCTerrainSLE3.6V6GASDownstream Left
2017GMCTerrainSLE3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2017GMCTerrainSLT3.6V6GASDownstream Left
2017GMCTerrainSLE3.6V6FLEXDownstream Right
2017GMCTerrainSLT3.6V6FLEXUpstream Left
2017GMCTerrainDenali3.6V6GASUpstream Left
2017GMCTerrainDenali3.6V6FLEXUpstream Left
2017GMCTerrainSLT3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2017GMCTerrainSLE3.6V6FLEXUpstream Left
2017GMCTerrainDenali3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2017GMCTerrainSLT3.6V6GASDownstream Right
2017GMCTerrainSLT3.6V6FLEXDownstream Left
2017GMCTerrainSLT3.6V6GASUpstream Left
2017GMCTerrainSLE3.6V6GASUpstream Left
2017GMCTerrainSLE3.6V6GASUpstream RightB1S1; OE Equivalent Design
2017GMCTerrainDenali3.6V6FLEXDownstream Left
2017GMCTerrainSLE3.6V6GASDownstream Right
2017GMCTerrainSLT3.6V6FLEXDownstream Right
2017GMCTerrainSLE3.6V6FLEXDownstream Left
2017GMCTerrainDenali3.6V6GASUpstream RightB1S1; OE Equivalent Design
2017GMCTerrainDenali3.6V6GASDownstream Right
2017GMCTerrainSLT3.6V6GASUpstream RightB1S1; OE Equivalent Design
2017GMCTerrainDenali3.6V6GASDownstream Left
2017GMCTerrainDenali3.6V6FLEXDownstream Right
2016BuickLaCrossePremium3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2016BuickLaCrosseSport Touring3.6V6GASUpstream Left
2016BuickLaCrosseSport Touring3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016BuickLaCrossePremium3.6V6FLEXUpstream Left
2016BuickLaCrosseLeather3.6V6FLEXDownstream Left
2016BuickLaCrosseLeather3.6V6GASUpstream Left
2016BuickLaCrossePremium3.6V6GASUpstream Left
2016BuickLaCrosseBase3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2016BuickLaCrossePremium3.6V6GASDownstream Right
2016BuickLaCrosseLeather3.6V6GASDownstream Right
2016BuickLaCrosseSport Touring3.6V6GASDownstream Left
2016BuickLaCrosseBase3.6V6FLEXDownstream Right
2016BuickLaCrosseSport Touring3.6V6GASDownstream Right
2016BuickLaCrosseSport Touring3.6V6FLEXDownstream Left
2016BuickLaCrosseBase3.6V6FLEXDownstream Left
2016BuickLaCrossePremium3.6V6GASDownstream Left
2016BuickLaCrosseLeather3.6V6FLEXUpstream Left
2016BuickLaCrosseLeather3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2016BuickLaCrosseBase3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016BuickLaCrossePremium3.6V6FLEXDownstream Left
2016BuickLaCrosseBase3.6V6GASUpstream Left
2016BuickLaCrossePremium3.6V6FLEXDownstream Right
2016BuickLaCrosseBase3.6V6GASDownstream Left
2016BuickLaCrosseLeather3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016BuickLaCrosseBase3.6V6GASDownstream Right
2016BuickLaCrosseLeather3.6V6GASDownstream Left
2016BuickLaCrossePremium3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016BuickLaCrosseBase3.6V6FLEXUpstream Left
2016BuickLaCrosseSport Touring3.6V6FLEXUpstream Left
2016BuickLaCrosseLeather3.6V6FLEXDownstream Right
2016BuickLaCrosseSport Touring3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2016BuickLaCrosseSport Touring3.6V6FLEXDownstream Right
2016CadillacSRXPremium3.6V6GASDownstream Left
2016CadillacSRXLuxury3.6V6GASDownstream Right
2016CadillacSRXPremium3.6V6GASUpstream Left
2016CadillacSRXPremium3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016CadillacSRXPerformance3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016CadillacSRXPerformance3.6V6GASDownstream Right
2016CadillacSRXBase3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016CadillacSRXPerformance3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2016CadillacSRXBase3.6V6GASDownstream Left
2016CadillacSRXBase3.6V6FLEXUpstream Left
2016CadillacSRXLuxury3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016CadillacSRXPerformance3.6V6GASUpstream Left
2016CadillacSRXPerformance3.6V6FLEXDownstream Right
2016CadillacSRXBase3.6V6GASDownstream Right
2016CadillacSRXPremium3.6V6GASDownstream Right
2016CadillacSRXPremium3.6V6FLEXDownstream Right
2016CadillacSRXLuxury3.6V6FLEXUpstream Left
2016CadillacSRXPremium3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2016CadillacSRXBase3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2016CadillacSRXPremium3.6V6FLEXDownstream Left
2016CadillacSRXLuxury3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2016CadillacSRXBase3.6V6FLEXDownstream Left
2016CadillacSRXLuxury3.6V6FLEXDownstream Left
2016CadillacSRXPremium3.6V6FLEXUpstream Left
2016CadillacSRXBase3.6V6FLEXDownstream Right
2016CadillacSRXPerformance3.6V6GASDownstream Left
2016CadillacSRXLuxury3.6V6GASUpstream Left
2016CadillacSRXPerformance3.6V6FLEXUpstream Left
2016CadillacSRXLuxury3.6V6GASDownstream Left
2016CadillacSRXPerformance3.6V6FLEXDownstream Left
2016CadillacSRXBase3.6V6GASUpstream Left
2016CadillacSRXLuxury3.6V6FLEXDownstream Right
2016CadillacELRBase1.4L4PLUG-IN HYBRID EV-GAS (PHEV)DownstreamB1S2; OE Equivalent Design
2016ChevroletEquinoxLTZ3.6V6GASUpstream Left
2016ChevroletEquinoxLTZ3.6V6GASDownstream Right
2016ChevroletEquinoxLTZ3.6V6GASDownstream Left
2016ChevroletEquinoxLTZ3.6V6FLEXDownstream Left
2016ChevroletEquinoxLTZ3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016ChevroletEquinoxLT3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2016ChevroletEquinoxLT3.6V6FLEXDownstream Left
2016ChevroletEquinoxLT3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016ChevroletEquinoxLT3.6V6FLEXDownstream Right
2016ChevroletEquinoxLTZ3.6V6FLEXDownstream Right
2016ChevroletEquinoxLTZ3.6V6FLEXUpstream Left
2016ChevroletEquinoxLT3.6V6GASDownstream Left
2016ChevroletEquinoxLT3.6V6GASDownstream Right
2016ChevroletEquinoxLT3.6V6GASUpstream Left
2016ChevroletEquinoxLT3.6V6FLEXUpstream Left
2016ChevroletEquinoxLTZ3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2016ChevroletImpala LimitedLT3.6V6FLEXUpstream Left
2016ChevroletImpala LimitedPolice3.6V6FLEXUpstream RightB1S1; Carryover Model; OE Equivalent Design
2016ChevroletImpala LimitedLTZ3.6V6FLEXDownstream Left
2016ChevroletImpala LimitedPolice3.6V6FLEXUpstream Left
2016ChevroletImpala LimitedPolice3.6V6FLEXDownstream Right
2016ChevroletImpala LimitedLT3.6V6FLEXDownstream Right
2016ChevroletImpala LimitedLTZ3.6V6FLEXUpstream Left
2016ChevroletImpala LimitedLS3.6V6FLEXUpstream Left
2016ChevroletImpala LimitedLS3.6V6FLEXUpstream RightB1S1; Carryover Model; OE Equivalent Design
2016ChevroletImpala LimitedLS3.6V6FLEXDownstream Right
2016ChevroletImpala LimitedLT3.6V6FLEXDownstream Left
2016ChevroletImpala LimitedLS3.6V6FLEXDownstream Left
2016ChevroletImpala LimitedLT3.6V6FLEXUpstream RightB1S1; Carryover Model; OE Equivalent Design
2016ChevroletImpala LimitedLTZ3.6V6FLEXDownstream Right
2016ChevroletImpala LimitedLTZ3.6V6FLEXUpstream RightB1S1; Carryover Model; OE Equivalent Design
2016ChevroletImpala LimitedPolice3.6V6FLEXDownstream Left
2016GMCTerrainSLT3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016GMCTerrainSLE3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016GMCTerrainDenali3.6V6GASUpstream RightB1S1; OE Equivalent Design
2016GMCTerrainDenali3.6V6GASUpstream Left
2016GMCTerrainSLE3.6V6GASDownstream Left
2016GMCTerrainSLT3.6V6GASDownstream Left
2016GMCTerrainSLT3.6V6GASUpstream Left
2016GMCTerrainDenali3.6V6GASDownstream Left
2016GMCTerrainDenali3.6V6GASDownstream Right
2016GMCTerrainSLT3.6V6GASDownstream Right
2016GMCTerrainSLE3.6V6GASUpstream Left
2016GMCTerrainSLE3.6V6GASDownstream Right
2015BuickLaCrossePremium3.6V6FLEXDownstream Right
2015BuickLaCrossePremium3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2015BuickLaCrossePremium3.6V6FLEXDownstream Left
2015BuickLaCrosseLeather3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2015BuickLaCrosseLeather3.6V6FLEXUpstream Left
2015BuickLaCrossePremium3.6V6FLEXUpstream Left
2015BuickLaCrosseLeather3.6V6FLEXDownstream Left
2015BuickLaCrosseBase3.6V6FLEXDownstream Left
2015BuickLaCrosseBase3.6V6FLEXDownstream Right
2015BuickLaCrosseBase3.6V6FLEXUpstream Left
2015BuickLaCrosseLeather3.6V6FLEXDownstream Right
2015BuickLaCrosseBase3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2015CadillacSRXPerformance3.6V6FLEXUpstream Left
2015CadillacSRXPerformance3.6V6FLEXDownstream Right
2015CadillacSRXBase3.6V6FLEXDownstream Left
2015CadillacSRXPremium3.6V6FLEXDownstream Left
2015CadillacSRXPerformance3.6V6FLEXDownstream Left
2015CadillacSRXBase3.6V6FLEXUpstream Left
2015CadillacSRXPremium3.6V6FLEXUpstream Left
2015CadillacSRXLuxury3.6V6FLEXDownstream Right
2015CadillacSRXLuxury3.6V6FLEXUpstream Left
2015CadillacSRXBase3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2015CadillacSRXPremium3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2015CadillacSRXLuxury3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2015CadillacSRXLuxury3.6V6FLEXDownstream Left
2015CadillacSRXBase3.6V6FLEXDownstream Right
2015CadillacSRXPremium3.6V6FLEXDownstream Right
2015CadillacSRXPerformance3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2015CadillacELRBase1.4L4PLUG-IN HYBRID EV-GAS (PHEV)DownstreamB1S2; OE Equivalent Design
2015ChevroletEquinoxLT3.6V6GASUpstream RightB1S1; OE Equivalent Design
2015ChevroletEquinoxLT3.6V6FLEXDownstream Left
2015ChevroletEquinoxLT3.6V6FLEXUpstream Left
2015ChevroletEquinoxLTZ3.6V6GASUpstream RightB1S1; OE Equivalent Design
2015ChevroletEquinoxLT3.6V6FLEXDownstream Right
2015ChevroletEquinoxLT3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2015ChevroletEquinoxLTZ3.6V6FLEXDownstream Right
2015ChevroletEquinoxLTZ3.6V6GASDownstream Left
2015ChevroletEquinoxLTZ3.6V6GASUpstream Left
2015ChevroletEquinoxLTZ3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2015ChevroletEquinoxLT3.6V6GASUpstream Left
2015ChevroletEquinoxLTZ3.6V6GASDownstream Right
2015ChevroletEquinoxLT3.6V6GASDownstream Left
2015ChevroletEquinoxLT3.6V6GASDownstream Right
2015ChevroletEquinoxLTZ3.6V6FLEXDownstream Left
2015ChevroletEquinoxLTZ3.6V6FLEXUpstream Left
2015ChevroletVoltBase1.4L4PLUG-IN HYBRID EV-GAS (PHEV)DownstreamB1S2; OE Equivalent Design
2015ChevroletImpala LimitedLS3.6V6FLEXDownstream Left
2015ChevroletImpala LimitedLT3.6V6FLEXDownstream Left
2015ChevroletImpala LimitedLTZ3.6V6FLEXUpstream Left
2015ChevroletImpala LimitedLS3.6V6FLEXUpstream RightB1S1; Carryover Model; OE Equivalent Design
2015ChevroletImpala LimitedLT3.6V6FLEXUpstream Left
2015ChevroletImpala LimitedPolice3.6V6FLEXUpstream Left
2015ChevroletImpala LimitedPolice3.6V6FLEXDownstream Right
2015ChevroletImpala LimitedLTZ3.6V6FLEXDownstream Right
2015ChevroletImpala LimitedPolice3.6V6FLEXDownstream Left
2015ChevroletImpala LimitedLS3.6V6FLEXUpstream Left
2015ChevroletImpala LimitedLTZ3.6V6FLEXDownstream Left
2015ChevroletImpala LimitedPolice3.6V6FLEXUpstream RightB1S1; Carryover Model; OE Equivalent Design
2015ChevroletImpala LimitedLS3.6V6FLEXDownstream Right
2015ChevroletImpala LimitedLT3.6V6FLEXUpstream RightB1S1; Carryover Model; OE Equivalent Design
2015ChevroletImpala LimitedLTZ3.6V6FLEXUpstream RightB1S1; Carryover Model; OE Equivalent Design
2015ChevroletImpala LimitedLT3.6V6FLEXDownstream Right
2015GMCTerrainSLE3.6V6GASUpstream RightB1S1; OE Equivalent Design
2015GMCTerrainSLE3.6V6FLEXDownstream Left
2015GMCTerrainSLE3.6V6GASUpstream Left
2015GMCTerrainSLE3.6V6GASDownstream Right
2015GMCTerrainDenali3.6V6FLEXUpstream Left
2015GMCTerrainSLT3.6V6GASUpstream RightB1S1; OE Equivalent Design
2015GMCTerrainSLT3.6V6GASDownstream Right
2015GMCTerrainDenali3.6V6FLEXDownstream Left
2015GMCTerrainSLT3.6V6GASDownstream Left
2015GMCTerrainSLT3.6V6FLEXDownstream Left
2015GMCTerrainSLE3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2015GMCTerrainDenali3.6V6GASUpstream Left
2015GMCTerrainDenali3.6V6GASUpstream RightB1S1; OE Equivalent Design
2015GMCTerrainSLT3.6V6FLEXUpstream Left
2015GMCTerrainSLE3.6V6FLEXUpstream Left
2015GMCTerrainDenali3.6V6FLEXDownstream Right
2015GMCTerrainDenali3.6V6GASDownstream Left
2015GMCTerrainDenali3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2015GMCTerrainSLT3.6V6GASUpstream Left
2015GMCTerrainSLE3.6V6GASDownstream Left
2015GMCTerrainDenali3.6V6GASDownstream Right
2015GMCTerrainSLT3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2015GMCTerrainSLE3.6V6FLEXDownstream Right
2015GMCTerrainSLT3.6V6FLEXDownstream Right
2014BuickLaCrosseBase3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2014BuickLaCrosseLeather3.6V6FLEXDownstream Left
2014BuickLaCrosseLeather3.6V6FLEXUpstream Left
2014BuickLaCrosseBase3.6V6FLEXUpstream Left
2014BuickLaCrossePremium3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2014BuickLaCrosseLeather3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2014BuickLaCrosseBase3.6V6FLEXDownstream Right
2014BuickLaCrossePremium3.6V6FLEXDownstream Right
2014BuickLaCrosseBase3.6V6FLEXDownstream Left
2014BuickLaCrossePremium3.6V6FLEXUpstream Left
2014BuickLaCrossePremium3.6V6FLEXDownstream Left
2014BuickLaCrosseLeather3.6V6FLEXDownstream Right
2014CadillacSRXBase3.6V6FLEXUpstream RightB1S1; OE Equivalent Design
2014CadillacSRXLuxury3.6V6FLEXDownstream Right
2014CadillacSRXPerformance3.6V6FLEXUpstream Left
Product info

The NTK Oxygen Sensor part number 21556 is designed to ensure optimal fuel efficiency and reduce harmful emissions for Buick, Cadillac, Chevrolet, and GMC vehicles. This sensor is made with high-quality materials to deliver reliable and consistent performance, making it an essential component for your car’s engine.

With its advanced sensing technology, this oxygen sensor provides accurate and fast feedback to the vehicle’s computer, allowing it to adjust the air-fuel mixture for optimal performance. This helps to improve fuel economy and reduce harmful emissions, making it a great choice for eco-conscious drivers.

Easy to install and compatible with a wide range of Buick, Cadillac, Chevrolet, and GMC models, this oxygen sensor is designed to meet or exceed OEM specifications. Its durable construction ensures long-lasting performance, making it a cost-effective solution for keeping your car running smoothly.

Whether you’re a professional mechanic or a DIY enthusiast, the NTK Oxygen Sensor part number 21556 is a must-have for your car maintenance toolkit. With its reliable performance, easy installation, and compatibility with a wide range of vehicles, this sensor is a smart choice for anyone looking to improve their car’s efficiency and reduce harmful emissions.

Specifications
California Proposition 65WARNING/Precaución: Cancer and Reproductive Harm - Cáncer y daño al sistema reproductivo - www.P65Warnings.ca.gov
Mounting TypeThreaded
Sensor TypeHeated
Thread Diameter18.000
Universal Or Specific FitSpecific
Wire Quantity4
Wiring Harness Length20.5000
Warranty
We offer a 2-year warranty on all parts that we sell. If the part fails within 2 years of purchase, please contact us for instructions to replace it. The warranty does not cover normal wear and tear or improper installation. On many parts, we also offer Extend product protection, which is a way to add up to 3 additional years for 5 total years of worry free coverage. Select your preferred term length and you're covered!
Delivery & Returns

Delivery Info

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Returns Info

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