Name: NTK 21546 Direct Fit Oxygen Sensor - Select 2003-2015 Buick, Cadillac, Chevrolet, and GMC
Brand: NGK
SKU: NGK21546
Price: 184.69 USD
Availability: InStock

NTK 21546 direct fit oxygen sensor with threaded mounting point and OE-style wire harness connector.

NTK 21546 Direct Fit Oxygen Sensor - Select 2003-2015 Buick, Cadillac, Chevrolet, and GMC

$184.69

Fits select 2003-2015 Buick, Cadillac, Chevrolet, GMC, Pontiac, Saab, and Saturn models.

The NTK 21546 Direct Fit Oxygen Sensor is a precision-engineered replacement designed to restore critical communication between your exhaust system and the ECU. As a specialized component of your vehicle's OBDII system, this sensor provides constant closed-loop feedback to manage the air-fuel ratio, ensuring peak engine performance, maximized fuel economy, and reduced emissions.

Constructed with an advanced ceramic element, this sensor features a three-stage contaminant-resistant plasma jet and a specialized deposit trap overcoat. This design protects the sensitive internal element from poisoning caused by fuel additives or carbon buildup, extending service life and preventing premature check engine lights. As an OE-style direct-fit component, it installs into factory locations with the correct connector for a seamless repair.

Manufacturer Part Number: 21546
Element Type: Advanced Ceramic with 3-stage plasma jet protection
Build: Integrated deposit trap overcoat protects against poisoning
Function: Monitors air-fuel ratio for optimal combustion efficiency
Fitment: Direct fit replacement for factory oxygen sensors

🔧 Fitment & Compatibility

Year	Make	Model	Submodel
2008	Buick	Enclave	CX
2008	Buick	Enclave	CXL
2005-2009	Buick	LaCrosse	CX
2005-2009	Buick	LaCrosse	CXL
2007-2011	Buick	Lucerne	CX
2007-2011	Buick	Lucerne	CXL
2010	Buick	Lucerne	CXL Special Edition
2005	Buick	Rainier	CXL
2005	Buick	Rainier	CXL Plus
2006-2007	Buick	Rendezvous	CX
2006-2007	Buick	Rendezvous	CXL
2005-2007	Buick	Terraza	CX
2005-2007	Buick	Terraza	CXL
2009-2015	Cadillac	CTS	V
2004-2005	Cadillac	DeVille	Base
2004-2005	Cadillac	DeVille	DHS
2004-2005	Cadillac	DeVille	DTS
2004-2005	Cadillac	DeVille	Protection Series
2003-2005,2008-2014	Cadillac	Escalade	Base
2009-2013	Cadillac	Escalade	Hybrid
2010-2013	Cadillac	Escalade	Hybrid Platinum
2011-2014	Cadillac	Escalade	Luxury
2008-2014	Cadillac	Escalade	Platinum
2011-2014	Cadillac	Escalade	Premium
2008-2014	Cadillac	Escalade ESV	Base
2011-2014	Cadillac	Escalade ESV	Luxury
2008-2014	Cadillac	Escalade ESV	Platinum
2011-2014	Cadillac	Escalade ESV	Premium
2008-2013	Cadillac	Escalade EXT	Base
2011-2013	Cadillac	Escalade EXT	Luxury
2011-2013	Cadillac	Escalade EXT	Premium
2004	Cadillac	Seville	SLS
2013	Chevrolet	Avalanche	Black Diamond LS
2013	Chevrolet	Avalanche	Black Diamond LT
2013	Chevrolet	Avalanche	Black Diamond LTZ
2008-2012	Chevrolet	Avalanche	LS
2008-2012	Chevrolet	Avalanche	LT
2008-2012	Chevrolet	Avalanche	LTZ
2003-2005	Chevrolet	Avalanche 1500	Base
2005	Chevrolet	Avalanche 1500	LS
2005	Chevrolet	Avalanche 1500	LT
2003	Chevrolet	Avalanche 1500	North Face
2003	Chevrolet	Avalanche 1500	On Road Edition
2003	Chevrolet	Avalanche 1500	WBH
2004-2005	Chevrolet	Avalanche 1500	Z66
2003-2005	Chevrolet	Avalanche 1500	Z71
2011-2013	Chevrolet	Caprice	PPV
2005,2010	Chevrolet	Cobalt	Base
2005-2010	Chevrolet	Cobalt	LS
2005-2010	Chevrolet	Cobalt	LT
2006-2007	Chevrolet	Cobalt	LTZ
2008	Chevrolet	Cobalt	Sport
2006-2007	Chevrolet	Cobalt	SS
2004	Chevrolet	Corvette	Base
2004	Chevrolet	Corvette	Z06
2005-2009	Chevrolet	Equinox	LS
2005-2009	Chevrolet	Equinox	LT
2008-2009	Chevrolet	Equinox	LTZ
2006-2011	Chevrolet	HHR	LS
2007-2011	Chevrolet	HHR	LS Panel
2006-2011	Chevrolet	HHR	LT
2007-2010	Chevrolet	HHR	LT Panel
2008	Chevrolet	Impala	50th Anniversary Edition
2006-2011	Chevrolet	Impala	LS
2006-2011	Chevrolet	Impala	LT
2006-2011	Chevrolet	Impala	LTZ
2006-2011	Chevrolet	Impala	Police
2008	Chevrolet	Malibu	Classic LS
2008	Chevrolet	Malibu	Classic LT
2004-2010	Chevrolet	Malibu	LS
2004-2012	Chevrolet	Malibu	LT
2006-2012	Chevrolet	Malibu	LTZ
2004	Chevrolet	Malibu	Maxx
2004-2007	Chevrolet	Malibu	Maxx LS
2004-2007	Chevrolet	Malibu	Maxx LT
2006-2007	Chevrolet	Malibu	Maxx LTZ
2006-2007	Chevrolet	Malibu	Maxx SS
2006-2007	Chevrolet	Malibu	SS
2006-2007	Chevrolet	Monte Carlo	LS
2006-2007	Chevrolet	Monte Carlo	LT
2006	Chevrolet	Monte Carlo	LTZ
2003-2005	Chevrolet	Silverado 1500	Base
2004-2005,2009-2013	Chevrolet	Silverado 1500	Hybrid
2003-2005,2007-2013	Chevrolet	Silverado 1500	LS
2003-2005,2007-2013	Chevrolet	Silverado 1500	LT
2007-2013	Chevrolet	Silverado 1500	LTZ
2003-2005,2007-2013	Chevrolet	Silverado 1500	WT
2010-2013	Chevrolet	Silverado 1500	XFE
2004-2005	Chevrolet	Silverado 1500	Z71 Off-Road
2007-2010	Chevrolet	Silverado 2500 HD	LT
2007-2010	Chevrolet	Silverado 2500 HD	LTZ
2007-2010	Chevrolet	Silverado 2500 HD	WT
2007-2010	Chevrolet	Silverado 3500 HD	LT
2007-2010	Chevrolet	Silverado 3500 HD	LTZ
2007-2010	Chevrolet	Silverado 3500 HD	WT
2013-2015	Chevrolet	Spark	LS
2013-2015	Chevrolet	Spark	LT
2005	Chevrolet	SSR	Base
2003-2005,2008-2014	Chevrolet	Suburban 1500	LS
2003-2005,2008-2014	Chevrolet	Suburban 1500	LT
2008-2014	Chevrolet	Suburban 1500	LTZ
2003-2005	Chevrolet	Suburban 1500	Z71
2008-2013	Chevrolet	Suburban 2500	LS
2008-2013	Chevrolet	Suburban 2500	LT
2008-2013	Chevrolet	Tahoe	Hybrid
2003-2005,2008-2014	Chevrolet	Tahoe	LS
2003-2005,2008-2014	Chevrolet	Tahoe	LT
2008-2014	Chevrolet	Tahoe	LTZ
2008-2014	Chevrolet	Tahoe	PPV
2012-2014	Chevrolet	Tahoe	SSV
2003-2005	Chevrolet	Tahoe	Z71
2005	Chevrolet	Trailblazer EXT	LS
2005	Chevrolet	Trailblazer EXT	LT
2005-2008	Chevrolet	Uplander	Base
2005-2008	Chevrolet	Uplander	LS
2005-2008	Chevrolet	Uplander	LT
2007-2008	GMC	Acadia	SLE
2007-2008	GMC	Acadia	SLT
2005	GMC	Envoy	Denali
2005	GMC	Envoy XL	Denali
2005	GMC	Envoy XL	SLE
2005	GMC	Envoy XL	SLT
2005	GMC	Envoy XUV	SLE
2005	GMC	Envoy XUV	SLT
2003-2005	GMC	Sierra 1500	Base
2007-2013	GMC	Sierra 1500	Denali
2005,2009-2013	GMC	Sierra 1500	Hybrid
2003,2007-2013	GMC	Sierra 1500	SL
2003-2005,2007-2013	GMC	Sierra 1500	SLE
2003-2005,2007-2013	GMC	Sierra 1500	SLT
2003-2005,2007-2013	GMC	Sierra 1500	WT
2010-2013	GMC	Sierra 1500	XFE
2007-2010	GMC	Sierra 2500 HD	SLE
2007-2010	GMC	Sierra 2500 HD	SLT
2007-2010	GMC	Sierra 2500 HD	WT
2007-2010	GMC	Sierra 3500 HD	SLE
2007-2010	GMC	Sierra 3500 HD	SLT
2007-2010	GMC	Sierra 3500 HD	WT
2008-2014	GMC	Yukon	Denali
2010-2013	GMC	Yukon	Denali Hybrid
2008-2013	GMC	Yukon	Hybrid
2003-2005,2008-2014	GMC	Yukon	SLE
2003-2005,2008-2014	GMC	Yukon	SLT
2008-2014	GMC	Yukon XL 1500	Denali
2003-2005,2008-2014	GMC	Yukon XL 1500	SLE
2003-2005,2008-2014	GMC	Yukon XL 1500	SLT
2008-2013	GMC	Yukon XL 2500	SLE
2008-2013	GMC	Yukon XL 2500	SLT
2005	Isuzu	Ascender	Limited
2005	Isuzu	Ascender	LS
2005	Isuzu	Ascender	S
2004-2005	Pontiac	Bonneville	GXP
2007-2009	Pontiac	G5	Base
2007-2009	Pontiac	G5	GT
2005-2010	Pontiac	G6	Base
2005-2010	Pontiac	G6	GT
2006-2007	Pontiac	G6	GTP
2008-2009	Pontiac	G6	GXP
2008-2009	Pontiac	G8	GT
2009	Pontiac	G8	GXP
2005-2008	Pontiac	Grand Prix	Base
2005	Pontiac	Grand Prix	GT
2004-2006	Pontiac	GTO	Base
2005-2006	Pontiac	Montana	SV6
2006-2007	Pontiac	Solstice	Base
2006-2009	Pontiac	Torrent	Base
2005	Saab	9-7x	Arc
2007-2008	Saturn	Aura	XE
2007-2009	Saturn	Aura	XR
2005	Saturn	Ion	1
2005-2007	Saturn	Ion	2
2005-2007	Saturn	Ion	3
2007-2008	Saturn	Outlook	XE
2007-2008	Saturn	Outlook	XR
2007	Saturn	Relay	1
2005-2007	Saturn	Relay	2
2005-2007	Saturn	Relay	3
2007	Saturn	Sky	Base
2006-2007	Saturn	Vue	Base
2007	Saturn	Vue	Green Line
2008-2009	Saturn	Vue	Red Line
2008-2010	Saturn	Vue	XE
2008-2010	Saturn	Vue	XR

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