TAUTOY 234-4668 & 234-4256 Oxygen Sensor Kit — 4Pcs Upstream/Downstream for Cadillac Escalade & Chevy Silverado (2008-2014)
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Description
xTAUTOY 4-Piece Oxygen Sensor Kit: Upstream and Downstream Coverage
Upgrade your vehicle's exhaust sensing with the TAUTOY 4-piece oxygen sensor kit, engineered for reliability across a range of GM trucks and SUVs from 2008 through 2014. This kit brings two upstream sensors and two downstream sensors designed to integrate with the factory harness and control module, delivering steady electrical signals that support accurate readings of the oxygen levels in the exhaust stream. The sensors are built to withstand high heat, road grime, and vibration, delivering consistent performance even on daily commutes or longer trips.
Two upstream sensors (part numbers 234-4668) monitor the air-fuel mixture upstream of the catalytic converter, while two downstream sensors (part numbers 234-4256) help verify converter efficiency further along the exhaust path. This pairing is intended to provide complete coverage where your engine management system relies on feedback to regulate ignition timing, fuel trim, and emissions-related feedback loops.
What’s in the box
- Upstream sensors x2 — 234-4668
- Downstream sensors x2 — 234-4256
Broad compatibility and OEM references
TAUTOY’s O2 sensor kit is designed to fit Cadillac Escalade and Escalade ESV models (2009–2014), plus a broad lineup of Chevrolet and GMC trucks and SUVs including Avalanche, Silverado 1500/2500/3500, Suburban, Sierra, Yukon, and Tahoe in various trims. The package lists multiple OEM part numbers to aid cross-reference checks, highlighting the product’s intent to align with a wide ecosystem of original equipment references. Notable numbers mentioned include 234-4668 and 234-4256, along with numerous cross-reference codes such as 12596558, 12596701, 213-4229, and 213-3866, among others. If you’re comparing parts, this broad set of references can help you confirm fitment for your specific year and model.
Tips for installation and use
Install by a qualified technician or an experienced do-it-yourselfer with basic automotive electrical familiarity. The upstream and downstream sensors plug into the same sensor harness points used by the original parts, and the kit’s two-by-two configuration is designed to simplify replacement. Expect gradual improvements in how the engine control unit reads the exhaust conditions, though results can vary with vehicle condition and driving style.
Possible benefits you may notice
- Enhanced oxygen sensing consistency that supports the engine control system.
- Better alignment of fuel trims across varying driving conditions.
- Clearer feedback loops for emissions-related diagnostics, potentially aiding maintenance readiness.
- Broad compatibility with a wide range of GM models, simplifying sourcing for future needs.
Warranty and support
TAUTOY backs this kit with a 1-year warranty, reflecting confidence in the build and a commitment to customer support if you encounter installation or compatibility questions.
FAQ
Q: Which vehicles are compatible with this 4-piece oxygen sensor kit?
A: Fits Cadillac Escalade/ESV (2009-2014) and various Chevy/GMC trucks and SUVs; verify with the OEM references listed.
Q: What’s included in the kit and how many sensors are there?
A: Includes two upstream 234-4668 sensors and two downstream 234-4256 sensors; four sensors total.
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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