QIYBONE Oxygen O2 Sensor Set Upstream & Downstream 234-4587 / 250-24253 for Jeep Dodge Chrysler Ram - 2pcs OE-Style Fit

These two oxygen sensors come as an upstream (pre-catalytic) and downstream (post-catalytic) replacement set engineered to restore accurate exhaust oxygen readings for vehicles listed in the compatibility table. Each sensor is manufactured to match common OE electrical and threading specifications so they integrate into the engine management system without major modifications. The set is useful when you need both sensors replaced—for example, when a check engine light flags multiple O2 sensor fault codes or when replacing a failed sensor during catalytic converter service.

Will these sensors fit my vehicle model and year?

Compatibility covers a broad range of Chrysler, Dodge, Jeep, and Ram platforms across many model years. Fitment includes common engines such as 3.6L, 3.7L, 4.7L, 5.7L and others; confirm your exact engine code and part number references to be certain. Use the published reference numbers and OE cross-references to match your factory sensor.

• Works with Jeep Grand Cherokee, Wrangler, Liberty, Cherokee, Patriot, Compass and more (2001–2022 where listed).
• Covers Dodge Charger, Challenger, Durango, Ram, Neon, Nitro, Caravan and other models (2000–2023 where listed).
• Includes Chrysler 200, 300, Pacifica, Town & Country and additional models across multiple years.
• Also compatible with select Ram ProMaster, Volkswagen Routan and Mitsubishi Raider applications.

How do these QIYBONE O2 sensors work in my exhaust system?

Upstream sensors measure the oxygen content in exhaust gases before the catalytic converter to help the engine control unit (ECU) adjust fuel mixture. Downstream sensors monitor catalytic converter efficiency by comparing downstream oxygen levels to upstream readings. Together they provide the ECU with the data needed for proper air–fuel ratio management and emissions monitoring.

• Upstream (pre-cat) provides real-time feedback for fuel trim adjustments.
• Downstream (post-cat) checks converter efficiency for emissions control.
• Set is supplied with correct thread and connector styles for listed OE numbers.

What installation details and maintenance should I expect?

Installation is similar to other threaded oxygen sensors: unplug the wiring harness, remove the old sensor with an oxygen-sensor socket, and torque the new unit to spec using anti-seize where appropriate. Allow the vehicle to complete several drive cycles after installation for the ECU to adapt and clear historical fault codes. If the check engine light persists, verify connector pins, wiring continuity and that the new sensors match the original upstream/downstream positions.

• Installed with standard O2 sensor tools; no special ECM reprogramming usually required.
• Replace both sensors when recommended to ensure balanced readings and diagnostics.
• Clear codes after installation and monitor for recurring fault codes.

Who this set is for: the QIYBONE two-sensor kit suits DIY mechanics, independent shops and fleet technicians who need a reliable, cost-effective upstream and downstream oxygen sensor replacement for compatible Jeep, Dodge, Chrysler, Ram and related models. Choose this set when OE cross-reference numbers match your vehicle or when both pre- and post-catalytic sensors require replacement to restore proper emission monitoring and engine performance.