A Guide to Replacing the Oxygen Sensor on Your 2012-2017 Buick Verano
Fix your check engine light and poor gas mileage by choosing the right oxygen sensor for your Verano.
- Your Verano has two O2 sensors; an upstream (Bank 1 Sensor 1) and a downstream (Bank 1 Sensor 2). Identify which one is faulty before buying.
- Check for two specific TSBs: a wire rubbing issue on 2013 models (PI0937) and a power steering leak that can contaminate the sensor wiring on all models (18-NA-009).
- For best results, use an OEM (ACDelco) or high-quality aftermarket brand like Denso or NGK/NTK to avoid compatibility problems.
- A special slotted oxygen sensor socket makes the replacement job much easier and is highly recommended for DIY.
Is Your Buick Verano Oxygen Sensor Failing?
A bad oxygen sensor is a common reason for the check engine light to appear on your dashboard. Besides the light, you might notice your Verano is getting worse gas mileage than usual. The engine may also run rough, hesitate when you accelerate, or even stall. These symptoms happen because the engine's computer is getting bad information and can't properly adjust the air and fuel mixture.
🎬 Watch: A complete Buick Verano O2 sensor replacement walkthrough.Vehicle-Specific Known Issues
TSB for 2013 Verano (2.4L Engine): General Motors issued Technical Service Bulletin (TSB) PI0937 for some 2013 models. The downstream oxygen sensor's wiring could rub against the passenger-side axle shaft, causing damage and triggering fault code P0137. 🎬 See this guide on diagnosing and fixing the P0137 code. The official fix is to replace the sensor and tie a loose knot in the new sensor's wire to provide clearance.
TSB for All Years: TSB 18-NA-009 notes that a power steering fluid leak from an inlet hose can drip onto the upstream (Bank 1) oxygen sensor wiring. This contamination can cause incorrect sensor readings and multiple trouble codes. If you are replacing an O2 sensor, it is wise to check for any fluid leaks from above.
Choosing the Right Aftermarket Oxygen Sensor
With many brands available, picking the right one can feel confusing. For the Buick Verano, it's best to stick with brands that are known to work well with General Motors vehicles. They are often categorized into tiers based on their quality and relationship with the original manufacturer.
Tier 1: OEM and OEM-Quality Brands
These are your best bet for a hassle-free repair. They are either the original supplier to GM or have a reputation for matching OEM quality and specifications precisely.
- ACDelco: This is GM's own parts brand and the original equipment manufacturer (OEM) for your Verano. Choosing an ACDelco sensor guarantees a perfect fit and correct electronic communication with your car's computer.
- Denso: A highly respected Japanese company that is an OEM supplier for many automakers. Denso sensors are widely recommended in forums as a top-quality alternative to ACDelco, often at a slightly lower price.
- NGK/NTK: Another top-tier OEM supplier known for sensors and ignition components. NTK is the sensor division of NGK, and their parts are considered reliable and high-quality.
Tier 2: Reputable Aftermarket Brands
These brands offer a good balance of quality and price. However, for GM vehicles, they can sometimes have compatibility issues.
- Bosch: Bosch is a massive, well-known parts manufacturer that invented the automotive oxygen sensor. However, some mechanics and Verano owners report that Bosch sensors can be calibrated differently than GM's original parts, sometimes causing persistent check engine lights or performance issues. While many have success, it is a slightly higher risk than using ACDelco or Denso.
- Delphi: Delphi is another major OEM supplier with strong ties to General Motors. Their parts are generally considered reliable and are a solid choice for replacement.
Tier 3: Budget-Friendly Brands
Brands like DriveWire and Walker Products fall into this category. They meet the basic requirements and are the most affordable. While they can be a good option if budget is the main concern, they may not offer the same longevity or precise performance as the top-tier brands.
Pro Tip: Always choose a 'Direct-Fit' sensor. These come with the correct electrical connector for your Verano and require no cutting or splicing of wires. 'Universal' sensors are cheaper but require you to splice the old connector onto the new sensor, which can lead to connection problems.
Oxygen Sensor Replacement Cost
The cost to replace an oxygen sensor depends on whether you do it yourself or go to a shop. The part price also varies significantly by brand.
| Cost Type | Estimated Price Range |
|---|---|
| New Aftermarket Part | $44 - $126 |
| New OEM Part (ACDelco) | $100 - $210 |
| Shop Labor | $80 - $150 per sensor |
| Total Shop Visit (1 Sensor) | $124 - $360 |
Frequently Asked Questions
How many oxygen sensors does my 2012-2017 Buick Verano have?
Your Buick Verano with either the 2.4L or 2.0L engine has two oxygen sensors. One is located 'upstream' in the exhaust manifold before the catalytic converter, and the other is 'downstream' in the exhaust pipe after the catalytic converter.
🎬 Watch: How to replace the downstream oxygen sensor.What is the difference between an upstream and downstream sensor?
The upstream sensor (also called Bank 1, Sensor 1) is the primary sensor that measures exhaust gases right out of the engine. The car's computer uses its readings to make real-time adjustments to the fuel mixture. The downstream sensor (Bank 1, Sensor 2) measures the gases after they've passed through the catalytic converter to make sure the converter is working correctly.
Can I clean my old oxygen sensor instead of replacing it?
It is not recommended. The sensing element inside is delicate and can be damaged by cleaning attempts. Contaminants that cause failure often penetrate deep into the sensor's ceramic element. Replacement is the only reliable solution.
Do I need a special tool to replace an oxygen sensor?
Yes, a special tool called an oxygen sensor socket is highly recommended. This socket has a slot down the side to accommodate the sensor's wire. While you might be able to use a standard wrench on the easily accessible downstream sensor, the upstream sensor is in a tighter spot where this tool is essential.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12637298
All sensors for the 2012-2017 Buick Verano are of the heated, 4-wire, narrow-band type. They use a standard M18x1.5 thread size and require a 22mm (or 7/8 inch) wrench or socket.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Buick Verano:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Buick Verano Oxygen Sensor Failing?
- Vehicle-Specific Known Issues
- Choosing the Right Aftermarket Oxygen Sensor
- Tier 1: OEM and OEM-Quality Brands
- Tier 2: Reputable Aftermarket Brands
- Tier 3: Budget-Friendly Brands
- Oxygen Sensor Replacement Cost
- Frequently Asked Questions
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