LABWORK Oxygen Sensor O2 Up & Downstream for 2004-2008 Buick Pontiac Chevrolet
LABWORK Oxygen Sensor O2 Up & Downstream for 2004-2008 Buick Pontiac Chevrolet is a direct-fit 4-wire aftermarket O2 sensor priced at $23.27. Designed for 3.8L GM vehicles, it ensures accurate fuel mixture readings without splicing, ideal for DIY repairs on Buick, Chevrolet, and Pontiac models.
● In stock
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Key features
- Direct fit for 2004-2008 GM 3.8L vehicles
- Factory-style connector, no splicing needed
- 4-wire heated zirconia sensor design
- 480mm (18.9") wire length for easy routing
- Replaces 234-4646, 234-4647, 234-4651
- Upstream and downstream compatibility
- US seller with fast domestic shipping
Pros
- +Plug-and-play installation
- +Affordable at $23.27
- +Correct fit for multiple GM models
- +No wire cutting required
- +Supports emissions compliance
Cons
- −Not for California-emission models
- −Aftermarket build, not OEM
About LABWORK Oxygen Sensor O2 Up & Downstream for 2004-2008 Buick Pontiac Chevrolet
What is LABWORK Oxygen Sensor O2 Up & Downstream for 2004-2008 Buick Pontiac Chevrolet?
The LABWORK Oxygen Sensor O2 Up & Downstream is a direct-fit replacement for factory-installed O2 sensors in select 2004–2008 Buick, Pontiac, and Chevrolet vehicles equipped with 3.8L V6 engines. This aftermarket sensor monitors exhaust oxygen levels to help your engine maintain optimal air-fuel balance, improving fuel efficiency and reducing emissions. It's designed for both upstream (pre-catalytic) and downstream (post-catalytic) positions, making it a versatile solution for comprehensive emissions system maintenance.
Key features
- Direct Fit — Matches OEM specifications for seamless installation on 3.8L GM vehicles.
- Correct Connector — Factory-style plug ensures no cutting or splicing of wires.
- 4-Wire Configuration — Supports heated zirconia sensing element for fast warm-up and accurate readings.
- 480mm Wire Length — 18.9 inches provides ample reach for under-hood routing.
- Interchange Compatibility — Replaces common OEM and aftermarket numbers like 234-4646, 234-4647, and 234-4651.
- US Seller — Fast domestic shipping from Lab Work Auto with local support.
- California-Compliant Options — Suitable for most 2004–2006 models excluding California-emission variants where noted.
Who is LABWORK Oxygen Sensor O2 Up & Downstream for 2004-2008 Buick Pontiac Chevrolet for?
This sensor is ideal for DIY mechanics maintaining older GM full-size sedans like the Buick LeSabre, Chevrolet Impala, Pontiac Grand Prix, and Buick LaCrosse. It’s especially useful when replacing failed sensors triggering check engine lights or failing emissions tests. With no special tools required, it’s accessible for intermediate-level home mechanics seeking reliable, cost-effective performance.
How does LABWORK Oxygen Sensor O2 Up & Downstream for 2004-2008 Buick Pontiac Chevrolet compare?
Compared to pricier OEM sensors from dealerships, this LABWORK unit delivers equivalent fit and function at a fraction of the cost. While not a remanufactured factory part, it avoids the compatibility risks of universal O2 sensors that require wire splicing. It matches the electrical and mechanical specs of leading aftermarket brands but at a competitive $23.27 price point, making it a smart upgrade over basic universal kits while maintaining plug-and-play convenience.
Best use cases
- →Replacing failed O2 sensor
- →Fixing check engine light
- →Passing emissions test
- →Improving fuel economy
- →Maintaining 3.8L GM engine
Is LABWORK Oxygen Sensor O2 Up & Downstream for 2004-2008 Buick Pontiac Chevrolet right for you?
Buy this LABWORK O2 sensor if you own a 2004–2008 Buick, Chevrolet, or Pontiac with a 3.8L engine and need a reliable, direct-fit replacement. Ideal for DIYers with basic wrench skills. Not recommended for California-emission variants. Consider OEM sensors for dealer-level rebuilds or universal types only if wiring experience exists.
How it compares: This LABWORK sensor beats universal O2 sensors by eliminating splicing, while costing less than OEM replacements. It matches the fit of factory units but lacks remanufactured housing quality. Best for those wanting plug-and-play value without compromising compatibility.
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What vehicles is the LABWORK O2 sensor compatible with?
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It fits 2004–2008 Buick, Pontiac, and Chevrolet models with 3.8L V6 engines, including Impala, Grand Prix, LeSabre, and Lucerne. Excludes California-emission variants. Always verify your engine code and sensor position before purchase.
Does this O2 sensor require wire splicing?
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No, this LABWORK O2 sensor has a factory-style connector and 480mm wiring harness. It plugs directly into your vehicle's existing port without cutting or splicing, ensuring a secure, reliable connection.
How do I know if I need an upstream or downstream O2 sensor?
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Upstream sensors are located before the catalytic converter and monitor engine exhaust. Downstream sensors are after the converter and track efficiency. This LABWORK unit works in both positions for 3.8L GM applications.
Is the LABWORK O2 sensor California legal?
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This sensor is not approved for vehicles requiring California emissions compliance. It's designed for federal emissions models only. Check your vehicle's certification label if unsure about your emissions standard.
Can I install this O2 sensor myself?
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Yes, with basic hand tools and safety precautions, most DIYers can install this sensor. Use an O2 sensor socket, disconnect the battery, and apply anti-seize on threads if needed. Torque to manufacturer specs to avoid damage.
How much does LABWORK Oxygen Sensor O2 Up & Downstream for 2004-2008 Buick Pontiac Chevrolet cost?
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LABWORK Oxygen Sensor O2 Up & Downstream for 2004-2008 Buick Pontiac Chevrolet is $23.27 at Lab Work Auto. Prices may change — click through to Lab Work Auto for the latest.
Is LABWORK Oxygen Sensor O2 Up & Downstream for 2004-2008 Buick Pontiac Chevrolet in stock at Lab Work Auto?
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Yes, LABWORK Oxygen Sensor O2 Up & Downstream for 2004-2008 Buick Pontiac Chevrolet is currently in stock at Lab Work Auto.
Specifications
- SKU
- F8-011645