Denso 234-4647 Oxygen Sensor - Downstream, Downstream Right or Upstream Left
OE Quality 60-Day Returns
Denso
 OE Style

Denso 234-4647 Oxygen Sensor - Downstream, Downstream Right or Upstream Left

Brand Denso 234-4647
Position Downstream
Connector Gender Female
Mounting Type Threaded
Sensor Type Heated
Thread Diameter 0.708
Universal Or Specific Fit Specific
Wire Quantity 4
Wiring Harness Length 12.60
Product line OE Style
Fits Buick, Chevrolet, Pontiac, Saturn, GMC, Isuzu, and Oldsmobile · 80 vehicles

OE style replacement. Precision-built for exact replacement and a first-time fit.

Heated sensor. Helps support faster operation and efficient engine performance.

Aluminum oxide trap layer. Protects the ceramic element for longer service life.

Cross-references ACDelco 213-800, ACDelco 213-816 and ACDelco 213-818 for the same application. See all 33.

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Denso OE Style Oxygen Sensor 234-4647

Denso 234-4647 is an OE Style heated oxygen sensor built for exact replacement and first-time fit. It is designed for downstream and upstream left applications across select Buick, Chevrolet, GMC, Isuzu, Oldsmobile, Pontiac, and Saturn vehicles, including Buick Lucerne, Chevrolet Impala, and Pontiac Grand Prix coverage.

Key Features

  • Heated oxygen sensor with a specific-fit design
  • 4-wire configuration with female connector
  • Threaded mounting type with 0.708 in. thread diameter
  • 12.60 in. wiring harness length
  • OE Style construction for direct replacement service
  • Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

OE Style Design and Fit

The Denso OE Style line is built to match original equipment requirements for fit, form, and function. Part number 234-4647 is precision built for direct replacement service on vehicles such as the Chevrolet Equinox, Buick LaCrosse, and Pontiac G6, with fitment covering downstream, downstream right, and upstream left positions where listed. This part cross-references Bosch 13178 and NTK 21048 for the same application.

By maintaining accurate sensor response, this oxygen sensor supports proper air-fuel control, which can help restore drivability and emissions system performance on affected GM and Isuzu platforms.

What It Is Used For

  • Replacing a failed downstream oxygen sensor
  • Addressing check engine light concerns tied to O2 sensor faults
  • Correcting fuel trim issues caused by inaccurate exhaust readings
  • Restoring emissions monitoring on compatible Buick, Chevrolet, GMC, Isuzu, Oldsmobile, Pontiac, and Saturn vehicles
  • Replacing a damaged threaded sensor or worn connector interface

Installation Notes and Tips

Verify the sensor position before ordering, since fitment includes downstream, downstream right, and upstream left locations. Confirm the 4-wire female connector, threaded mount, and harness length match the original sensor on your vehicle. For best results, compare the old sensor’s connector style and thread size before installation. Fits 2006-2008 Buick Lucerne, downstream; Fits 2006-2007 Chevrolet Malibu, downstream right; Fits 2000-2002 GMC Safari, upstream left.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent replacement quality. The sensor uses an aluminum oxide trap layer to help protect the sensing element from contamination, supporting long service life and stable engine management performance.

Related reading

This part fits 80 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionPositionNotes
2008BuickLucerne—DownstreamOE Style
2007BuickAllure—DownstreamOE Style
2007BuickLaCrosse—DownstreamOE Style
2007BuickLucerne—DownstreamOE Style
2007BuickRendezvous—DownstreamOE Style
2007BuickTerraza—DownstreamOE Style
2007ChevroletCorvette—DownstreamOE Style
2007ChevroletEquinox—DownstreamOE Style
2007ChevroletImpala—DownstreamOE Style
2007ChevroletMalibu—Downstream RightOE Style
2007ChevroletMonte Carlo—DownstreamOE Style
2007ChevroletUplander—DownstreamOE Style
2007PontiacG6AutomaticDownstream RightOE Style
2007PontiacGrand Prix—DownstreamOE Style
2007PontiacMontana—DownstreamOE Style
2007PontiacTorrent—DownstreamOE Style
2007SaturnAura—Downstream RightOE Style
2007SaturnRelay—DownstreamOE Style
2006BuickAllure—DownstreamOE Style
2006BuickLaCrosse—DownstreamOE Style
2006BuickLucerne—DownstreamOE Style
2006BuickRendezvous—DownstreamOE Style
2006BuickTerraza—DownstreamOE Style
2006ChevroletCorvette—DownstreamOE Style
2006ChevroletEquinox—DownstreamOE Style
2006ChevroletImpala—DownstreamOE Style
2006ChevroletMalibu—Downstream RightOE Style
2006ChevroletMonte Carlo—DownstreamOE Style
2006ChevroletUplander—DownstreamOE Style
2006PontiacG6AutomaticDownstream RightOE Style
2006PontiacGrand Prix—DownstreamOE Style
2006PontiacMontana—DownstreamOE Style
2006PontiacTorrent—DownstreamOE Style
2006SaturnRelay—DownstreamOE Style
2005BuickAllure—DownstreamOE Style
2005BuickCentury—DownstreamOE Style
2005BuickLaCrosse—DownstreamOE Style
2005BuickLeSabre—DownstreamOE Style
2005BuickPark Avenue—DownstreamOE Style
2005BuickRendezvous—DownstreamOE Style
2005BuickTerraza—DownstreamOE Style
2005ChevroletCorvette—DownstreamOE Style
2005ChevroletEquinox—DownstreamOE Style
2005ChevroletImpala—DownstreamOE Style
2005ChevroletMonte Carlo—DownstreamOE Style
2005ChevroletUplander—DownstreamOE Style
2005PontiacAztek—DownstreamOE Style
2005PontiacBonneville—DownstreamOE Style
2005PontiacGrand Prix—DownstreamOE Style
2005PontiacMontana—DownstreamOE Style
2005SaturnRelay—DownstreamOE Style
2004BuickLeSabre—DownstreamOE Style
2004BuickPark Avenue—DownstreamOE Style
2004BuickRainier—DownstreamOE Style
2004BuickRegal—DownstreamOE Style
2004ChevroletImpala—DownstreamOE Style
2004ChevroletMonte Carlo—DownstreamOE Style
2004ChevroletSSR—DownstreamOE Style
2004ChevroletTrailblazer EXT—DownstreamOE Style
2004GMCEnvoy XL—DownstreamOE Style
2004GMCEnvoy XUV—DownstreamOE Style
2004IsuzuAscender—DownstreamOE Style
2004PontiacBonneville—DownstreamOE Style
2004PontiacGrand Prix—DownstreamOE Style
2003ChevroletSSR—DownstreamOE Style
2003ChevroletTrailblazer EXT—DownstreamOE Style
2003GMCEnvoy XL—DownstreamOE Style
2003IsuzuAscender—DownstreamOE Style
2003OldsmobileAurora—DownstreamOE Style
2002ChevroletAstro—Upstream LeftOE Style
2002GMCSafari—Upstream LeftOE Style
2002OldsmobileAurora—DownstreamOE Style
2002OldsmobileIntrigue—DownstreamOE Style
2001ChevroletAstro—Upstream LeftOE Style
2001GMCSafari—Upstream LeftOE Style
2001OldsmobileAurora—DownstreamOE Style
2001OldsmobileIntrigue—DownstreamOE Style
2000ChevroletAstro—Upstream LeftOE Style
2000GMCSafari—Upstream LeftOE Style
2000OldsmobileIntrigue—DownstreamOE Style
Directly replaces or cross-references 33 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — 213-800ACDelco — 213-816ACDelco — 213-818ACDelco — 213-1528ACDelco — 213-1552ACDelco — 213-1641ACDelco — 213-1692BorgWarner — OS1473BorgWarner — OS2008BorgWarner — OS2011BorgWarner — OS2012BorgWarner — OS2132BorgWarner — OS2135Bosch — 13178Bosch — 15895Delphi — ES20094Delphi — ES20320GMC — 12559848GMC — 12561777GMC — 12562621GMC — 12567163GMC — 12574924GMC — 19209807Isuzu — 8125671630NTK — 21048Standard Ignition — SG532Standard Ignition — SG535Standard Ignition — SG536Standard Ignition — SG720Standard Ignition — SG1299Standard Ignition — SG1302Walker Products — 250-24836Walker Products — 350-34524