Maxfavor Oxygen Sensor O2 Sensor Upstream & Downstream — 234-4018 / 234-4012 for Chevy, GMC, Cadillac
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Description
xOverview
The Maxfavor Oxygen Sensor is designed as a reliable OE-style replacement that matches the fit and function of original sensors. Built to work with a broad spectrum of GM vehicles from the late 1990s through the early 2000s, this sensor helps monitor exhaust oxygen levels to support proper air-fuel balance and efficient combustion. While results can vary by vehicle and driving conditions, users may notice smoother idle and responsive throttle as the engine receives accurate feedback from the sensor.
Manufactured to align with upstream and downstream configurations, this sensor family aims to mirror the performance of the sensors it replaces. Its robust construction is meant to withstand the heat and vibrations typical of daily driving, helping you maintain consistent sensor readings over time.
Compatibility & Range
- Fits a wide range of GM cars and trucks from 1996 to 2002, including Chevy Tahoe, Silverado, Suburban, Express, and GMC Sierra/Savana models.
- Also suitable for Yukon, Cadillac Escalade, and related GM SUV/van applications of the era.
OE References & Fitment
- Replacement OE numbers include a variety of authentic cross-references such as 19178116, 19178935, 19178945, 25312194, 2344018 and more for the 234-4018 and 234-4012 families.
- The listing covers both upstream and downstream sensors to match your vehicle’s sensor topology and diagnostic needs.
Installation & Setup
- Locate the oxygen sensor position and remove it with a socket, taking care to avoid wire damage.
- Compare the new sensor to the old one to ensure proper fit and orientation.
- Clean the threaded port to guarantee a proper seal for the new sensor.
- Gently tighten the sensor to keep the wire clear from heat sources or moving parts to prevent leakage.
- Reconnect the connector and, if needed, clear diagnostic trouble codes from the vehicle’s computer.
Buy With Confidence
If the sensor does not fit your vehicle, you can return it. Please ensure the item is clean and packaged in good condition to qualify for a return.
Real-Life Use Scenarios
Imagine a daily commute where the engine shares precise feedback about exhaust oxygen levels. The sensor’s performance contributes to steadier idle, improved throttle feel, and a smoother drive in city traffic or on long highway trips. While not a guarantee, the sensor’s compatibility and OE-style design aim to provide a dependable replacement experience for many GM models from that era.
Key Takeaways
- Broad GM compatibility across several models and years
- OE-number cross-refs help simplify supplier matching
- Clear installation steps that emphasize proper sealing and wiring safety
- Return option if it does not fit your vehicle
FAQ
Q: Is this oxygen sensor compatible with my GM vehicle?
A: It fits a broad range of GM models from the late 1990s to early 2000s, including Chevy, GMC, and Cadillac vehicles listed in the specs.
Q: How do I install the sensor and what if it doesn't fit?
A: Follow the steps: locate, compare, clean the port, tighten, reconnect. If it does not fit, returns are accepted in clean condition.
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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