Denso Oxygen Sensor 234-4337 – OE-Quality Replacement for Buick, Cadillac, Chevrolet, GMC, Hummer
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Description
xOverview
Denso part 234-4337 is a direct replacement oxygen sensor designed to fit a broad range of GM models. It performs as a precise, first-time fit for select Buick Lucerne, Cadillac DTS and Escalade families, Chevrolet Silverado and Avalanche lines, GMC Sierra and Yukon variants, and Hummer trucks and SUVs. By monitoring exhaust oxygen levels, the sensor provides data that helps your engine control unit optimize combustion and emissions handling, contributing to smoother starts and steadier performance.
Quality and OE alignment
Built to meet or exceed OE standards, this sensor uses high quality materials and a careful manufacturing process to ensure reliable installation and consistent operation. The included aluminum oxide trap layer is designed to shield the ceramic sensing element from common contaminants such as silicone and lead, helping preserve sensor response over time.
Key benefits you may notice
- Potential for more efficient fuel usage as the engine control system receives accurate oxygen data.
- Easy installation with a true first-time fit that aligns with the original mounting points and connectors.
- Durable construction designed to tolerate the rigors of the engine bay and long-term use.
- OE-standard precision ensures compatibility with the listed models and years.
Compatibility and installation tips
This sensor targets a wide range of models from 2006 to 2013 across Buick, Cadillac, Chevrolet, GMC, and Hummer lines. Before ordering, confirm your exact year and model to ensure proper fitment. When replacing, disconnect the battery, locate the sensor in the exhaust manifold or exhaust pipe, and use the included connectors carefully to avoid damage.
Why consider a Denso replacement
Choosing a Denso sensor can provide consistent oxygen data, which helps the engine management system optimize combustion and reduce exhaust variation. While results vary, a well-matched sensor is a key component in maintaining smooth idle and steady performance along with healthier emissions data.
FAQ
Q: Which vehicles are compatible with the Denso 234-4337 sensor?
A: Compatible with select Buick, Cadillac, Chevrolet, GMC, and Hummer models listed; verify your vehicle's year and model before ordering.
Q: What benefits does this sensor offer as a replacement?
A: OE-standard manufacturing, aluminum oxide trap layer protecting the ceramic element, and a first-time fit, with potential benefits for engine efficiency and longevity.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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