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Get affordable Oldsmobile Alero oxygen sensors you deserve. In just 10 minutes, you could save up to 80% with PartsGeek. Save time and dollars on your next Alero o2 sensors purchase. Over 12 Years of saving people money and providing great customer service. Check our low-cost options today. The average cost for oxygen sensor replacement is between $27.43 and $63.58

Oldsmobile Alero Oxygen Sensor Reviews
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Shop Oldsmobile Alero Replacement Oxygen Sensor

If you're driving an Oldsmobile Alero experiencing difficulty passing emissions testing, the problem could be a faulty oxygen sensor. Also known as an O2 sensor, Aleros have two types of these devices installed along the exhaust system - front or upstream sensors and rear or downstream sensors. Front O2 sensors help the engine's computer adjust the fuel/air mixture while rear sensors give feedback regarding the working of the catalytic converter. Faulty upstream O2 sensors can allow the engine to run too lean, causing excessive heat buildup in the cylinders or too rich, causing excessive fuel consumption and fouled spark plugs. If the diagnostic trouble codes say there's an O2 sensor problem make sure the replacement part is correct, as front and rear sensors are not interchangeable. PartsGeek.com has quality replacement oxygen sensors, front and rear, for all years of the Oldsmobile Alero, including Bosch, the OEM part producer.

We stock these Oxygen Sensor brands for the Oldsmobile Alero: ReplacementBoschDensoNGKNTKStandard Motor ProductsWalkerDIY Solutions

Select your Alero year

Review Fitment Notes
Showing 23 of 416 Results
Downstream Replacement Oxygen Sensor - for 2004 Oldsmobile Alero 3.4L V6 - 903-027 Click to Enlarge
Website Reviews
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Part Number: 903-027
Brand: Replacement
Notes: Oxygen Sensor -- 4 Wire; Direct Fit; Correct Connector; No Cutting or Splicing; Correct Wire Length (47.5 Inches)
Product Remark: O2 OXYGEN SENSOR
Position: Downstream
Condition: New
Shipping Options: Free Ground Shipping
$35.95
with FREE Shipping
(45) In Stock
This Part Fits:
Catalog: E
Vehicle Engine Notes
2004 Oldsmobile Alero 3.4L V6 Exact Fit
Downstream Bosch Oxygen Sensor - for 2004 Oldsmobile Alero 3.4L V6 - 13111 Click to Enlarge
4.9 Stars
Bosch 13111
Oxygen Sensor
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Part Number: 13111
Brand: Bosch
Notes: Engineered Oxygen Sensor -- Exact Fit
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Downstream
Condition: New
Shipping Options: Ground
$46.43
(99) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2004 Oldsmobile Alero 3.4L V6
Upstream Bosch Oxygen Sensor - for 2001 Oldsmobile Alero 2.4L 4 Cyl - 13191 Click to Enlarge
5 Stars
Bosch 13191
Oxygen Sensor
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Part Number: 13191
Brand: Bosch
Notes: Engineered Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Upstream
Condition: New
Shipping Options: Ground
$31.43
(4) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2001 Oldsmobile Alero 2.4L 4 Cyl
Upstream Bosch Oxygen Sensor - for 2001 Oldsmobile Alero 3.4L V6 - 13474 Click to Enlarge
5 Stars
Bosch 13474
Oxygen Sensor
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Part Number: 13474
Brand: Bosch
Notes: Engineered Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Upstream
Condition: New
Shipping Options: Ground
$27.43
(99) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2001 Oldsmobile Alero 3.4L V6
Upstream Bosch Oxygen Sensor - for 2000 Oldsmobile Alero 2.4L 4 Cyl - 13191 Click to Enlarge
5 Stars
Bosch 13191
Oxygen Sensor
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Part Number: 13191
Brand: Bosch
Notes: Engineered Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Upstream
Condition: New
Shipping Options: Ground
$31.43
(4) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2000 Oldsmobile Alero 2.4L 4 Cyl
Downstream Bosch Oxygen Sensor - for 2000 Oldsmobile Alero 3.4L V6 - 13111 Click to Enlarge
4.9 Stars
Bosch 13111
Oxygen Sensor
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Part Number: 13111
Brand: Bosch
Notes: Engineered Oxygen Sensor -- Exact Fit
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Downstream
Condition: New
Shipping Options: Ground
$46.43
(99) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2000 Oldsmobile Alero 3.4L V6
Upstream Denso Oxygen Sensor - for 2004 Oldsmobile Alero - 234-4646 Click to Enlarge
5 Stars
Denso 234-4646
Oxygen Sensor
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Part Number: 234-4646
Brand: Denso
Notes: OE Style -- O.E. Quality Replacement Sensor
  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$34.43
(99) In Stock
This Part Fits:
Catalog: B
Vehicle
2004 Oldsmobile Alero
Upstream Bosch Oxygen Sensor - for 2004 Oldsmobile Alero 3.4L V6 - 15896 Click to Enlarge
5 Stars
Bosch 15896
Oxygen Sensor
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Part Number: 15896
Brand: Bosch
Notes: Engineered Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Upstream
Condition: New
Shipping Options: Ground
$32.43
(96) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2004 Oldsmobile Alero 3.4L V6
Upstream Bosch Oxygen Sensor - for 2002 Oldsmobile Alero 3.4L V6 - 15896 Click to Enlarge
5 Stars
Bosch 15896
Oxygen Sensor
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Part Number: 15896
Brand: Bosch
Notes: Engineered Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Upstream
Condition: New
Shipping Options: Ground
$32.43
(96) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2002 Oldsmobile Alero 3.4L V6
Downstream Bosch Oxygen Sensor - for 2002 Oldsmobile Alero 2.2L 4 Cyl - 15900 Click to Enlarge
5 Stars
Bosch 15900
Oxygen Sensor
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Part Number: 15900
Brand: Bosch
Notes: Engineered Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Downstream
Condition: New
Shipping Options: Ground
$46.43
(4) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2002 Oldsmobile Alero 2.2L 4 Cyl
Downstream Bosch Oxygen Sensor - for 2004 Oldsmobile Alero 2.2L 4 Cyl - 15900 Click to Enlarge
5 Stars
Bosch 15900
Oxygen Sensor
Loading Reviews...
Part Number: 15900
Brand: Bosch
Notes: Engineered Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Downstream
Condition: New
Shipping Options: Ground
$46.43
(4) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2004 Oldsmobile Alero 2.2L 4 Cyl
Downstream Bosch Oxygen Sensor - for 2001 Oldsmobile Alero 3.4L V6 - 13111 Click to Enlarge
4.9 Stars
Bosch 13111
Oxygen Sensor
Loading Reviews...
Part Number: 13111
Brand: Bosch
Notes: Engineered Oxygen Sensor -- Exact Fit
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Downstream
Condition: New
Shipping Options: Ground
$46.43
(99) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2001 Oldsmobile Alero 3.4L V6
Upstream Denso Oxygen Sensor - for 2003 Oldsmobile Alero - 234-4650 Click to Enlarge
4.9 Stars
Denso 234-4650
Oxygen Sensor
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Part Number: 234-4650
Brand: Denso
Notes: OE Style -- DENSO is the O.E. Manufacturer / Oxygen Sensor
  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$32.43
(99) In Stock
This Part Fits:
Catalog: B
Vehicle
2003 Oldsmobile Alero
Downstream Bosch Oxygen Sensor - for 2001 Oldsmobile Alero 3.4L V6 - 15732 Click to Enlarge
4.5 Stars
Bosch 15732
Oxygen Sensor
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Part Number: 15732
Brand: Bosch
Notes: Universal Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Includes Smart Link Connector, no soldering required
  • No special tools required for installation
  • Seared protection tube due to 100% functional quality test
  • Performance meets or exceeds OE specifications
Position: Downstream
Condition: New
Shipping Options: Ground
$40.43
(19) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2001 Oldsmobile Alero 3.4L V6
Upstream Denso Oxygen Sensor - for 2002 Oldsmobile Alero - 234-4209 Click to Enlarge
4.8 Stars
Denso 234-4209
Oxygen Sensor
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Part Number: 234-4209
Brand: Denso
Notes: Universal -- O.E. Quality Universal Replacement Sensor
  • Manufactured to the highest O.E. quality, guaranteed to fit right
  • Aluminum oxide trap, this extra layer helps to protect from silicone and lead poisoning
  • Stainless steel housing and porous Teflon filter all contribute to make a long life
  • Improved engine performance and greater fuel efficiency
  • Prevents premature sensor failure
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$38.43
(99) In Stock
This Part Fits:
Catalog: B
Vehicle
2002 Oldsmobile Alero
Upstream Bosch Oxygen Sensor - for 2000 Oldsmobile Alero 3.4L V6 - 13474 Click to Enlarge
5 Stars
Bosch 13474
Oxygen Sensor
Loading Reviews...
Part Number: 13474
Brand: Bosch
Notes: Engineered Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Upstream
Condition: New
Shipping Options: Ground
$27.43
(99) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2000 Oldsmobile Alero 3.4L V6
Downstream NGK Oxygen Sensor - for 2004 Oldsmobile Alero 3.4L V6 - 21537 Click to Enlarge
Website Reviews
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Part Number: 21537
Brand: NGK
Notes: Direct Fit Oxygen Sensor -- B1S2; OE Equivalent Design
  • NTK oxygen sensors are equipped with OEM specified connectors and attaching hardware for easy installation. Dual-coated platinum element to increase longevity and ensure the quickest response time.
  • NTK oxygen sensors heat up rapidly to meet requirements of the vehicle to improve fuel economy and reduce emissions. NTK's proprietary ceramic element overcoat protects against sensor failure.
  • NTK is constantly improving sensor designs to provide excellent performance and improve resistance to failure. NTK works with their OEM manufacturers through each phase of development from concept to production.
Position: Downstream
Condition: New
Shipping Options: Ground
$31.98
(7) In Stock
This Part Fits:
Catalog: F
Vehicle Engine
2004 Oldsmobile Alero 3.4L V6
Upstream NTK Oxygen Sensor - for 2004 Oldsmobile Alero 2.2L 4 Cyl - W0133-1843330 Click to Enlarge
5 Stars
NTK W0133-1843330
Oxygen Sensor
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Part Number: W0133-1843330
Brand: NTK
Notes: OE Connector
Product Remark: OE Type
Position: Upstream
Condition: New
Shipping Options: Ground, Overnight, 2 Day
OEM
List Price:
$93.04
Our Price: $63.58
(4) In Stock
This Part Fits:
Catalog: A
Vehicle Engine
2004 Oldsmobile Alero 2.2L 4 Cyl
Upstream Bosch Oxygen Sensor - for 2001 Oldsmobile Alero 2.4L 4 Cyl - 12211 Click to Enlarge
4 Stars
Bosch 12211
Oxygen Sensor
Loading Reviews...
Part Number: 12211
Brand: Bosch
Notes: Universal Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Includes Smart Link Connector, no soldering required
  • No special tools required for installation
  • Seared protection tube due to 100% functional quality test
  • Performance meets or exceeds OE specifications
Position: Upstream
Condition: New
Shipping Options: Ground
$41.08
(9) In Stock
This Part Fits:
Catalog: H
Vehicle Engine
2001 Oldsmobile Alero 2.4L 4 Cyl
Upstream Standard Motor Products Oxygen Sensor - for 2004 Oldsmobile Alero 2.2L 4 Cyl - SG326 Click to Enlarge
Website Reviews
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Part Number: SG326
Brand: Standard Motor Products
Notes: Oxygen Sensor
Position: Upstream
Condition: New
Contents: Oxygen Sensor
Heated: Yes
Shipping Options: Ground
$55.98
(1) In Stock
This Part Fits:
Catalog: C
Vehicle Engine
2004 Oldsmobile Alero 2.2L 4 Cyl
Upstream Front Walker Oxygen Sensor - for 2004 Oldsmobile Alero 3.4L V6 VIN: E FI Naturally Aspirated GAS - 250-24269 Click to Enlarge
Website Reviews
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Part Number: 250-24269
Brand: Walker
Notes: OE
  • Designed to meet or exceed OE specifications in form, fit and function. Global coverage for import and/or domestic applications. Direct fit replacement. Performance meets or exceeds OE performance. Increase fuel economy and lower emissions
Position: Upstream Front
Condition: New
Shipping Options: Ground
$35.98
(7) In Stock
This Part Fits:
Catalog: T
Vehicle Engine
2004 Oldsmobile Alero 3.4L V6 VIN: E FI Naturally Aspirated GAS
Upstream DIY Solutions Oxygen Sensor with Socket Kit - for 2004 Oldsmobile Alero 3.4L V6 - EMS00142 Click to Enlarge
Website Reviews
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Part Number: EMS00142
Brand: DIY Solutions
Notes: V6 3.4L; Upstream
  • Quality Tested - built to a strict level of product standards.
  • Direct Fit Replacement
Position: Upstream
Condition: New
Also Used For: LS Swap
Shipping Options: Free Ground Shipping
$44.95
with FREE Shipping
View Details
This Part Fits:
Catalog: Q
Vehicle Engine
2004 Oldsmobile Alero 3.4L V6
Upstream Standard Motor Products Oxygen Sensor - for 2004 Oldsmobile Alero 3.4L V6 - SG1856 Click to Enlarge
Website Reviews
Loading Reviews...
Part Number: SG1856
Brand: Standard Motor Products
Notes: Oxygen Sensor
Position: Upstream
Condition: New
Shipping Options: Ground
$56.98
View Details
This Part Fits:
Catalog: N
Vehicle Engine
2004 Oldsmobile Alero 3.4L V6

Related Fuel Injection Parts

Oxygen Sensors available for the following Oldsmobile Alero years: 2004, 2003, 2002, 2001, 2000, 1999, 04, 03, 02, 01, 00, 99. This part is also sometimes called Oldsmobile Alero O2 Sensor. We stock oxygen sensor parts for most Oldsmobile models including Bravada, Silhouette, Intrigue, Aurora, 88, Cutlass Ciera, Cutlass Supreme, Cutlass, 98, Achieva, LSS, Custom Cruiser, Delta 88, Regency, Cutlass Calais, Cutlass Cruiser, Toronado, Cutlass Salon, Starfire, Omega, Firenza and Calais.

Oldsmobile Alero Oxygen Sensor Reviews
5 of 5
Verified Customer
11/18/13 07:57 AM - USA

by far the best price and great service. I will be shopping there again. - mossman oxygen sensor

- 2001 Oldsmobile Alero Oxygen Sensor
5 of 5
Verified Customer
1/29/14 11:48 AM - USA

I have ordered many times and have had great success. - dealer alternative parts geek

- 2003 Oldsmobile Alero Oxygen Sensor
5 of 5
Verified Customer
2/18/15 05:49 PM - USA

The Bosch oxygen sensor resolved the problem. It was easy to install with a standard open end wrench. No special tool required. - Bosch 13111 Oxygen Sensor

- 2004 Oldsmobile Alero Oxygen Sensor
5 of 5
Verified Customer
4/5/15 11:55 AM - USA

This was the part I needed and it worked. Only thing was it had a different type of harness. Extra tab inside. But I would still recommend this sight for parts. - big mike

- 2004 Oldsmobile Alero Oxygen Sensor
5 of 5
Verified Customer
6/23/15 07:28 AM - USA

After getting the code I replaced the o2 sensor. Again I saved several dollars. - Check Engine light

- 2002 Oldsmobile Alero Oxygen Sensor
5 of 5
Verified Customer
8/20/15 07:58 AM - USA

Part got here on time, the track number dodnt work but it still showed up. Part worked great i changed this o2 sensor once with a bosch and it didnt compare to this ac delco the bosch sensor failed right off but the one i purchased from partsgeek is flawless - Ac delco

- 2004 Oldsmobile Alero Oxygen Sensor