Sangyue Oxygen (O2) Sensor Set — 2PCS Upstream & Downstream for Chrysler Jeep Dodge, Matched Pair for 2001–2020 Engines

The Sangyue 2PCS Oxygen O2 Sensor set includes both upstream and downstream sensors designed to replace factory units for compatible Chrysler, Jeep and Dodge vehicles.

This pair of oxygen sensors (front and rear) is intended to restore accurate air-fuel monitoring after a worn or failed OEM sensor. Supplied as a matched upstream + downstream set, the sensors are manufactured to fit specific 2001–2020 model-year Chrysler, Jeep and Dodge engines that use 2.0L–5.9L configurations. The bundle helps your vehicle’s engine control module get reliable oxygen readings for fuel-trim and emissions management without swapping sensors individually.

Which vehicles and engine sizes does this Sangyue O2 sensor set fit?

The Sangyue two-piece kit is built for many Chrysler, Jeep and Dodge models across 2001–2020 model years. Fitment covers multiple engine displacements and includes both older Rams and modern Compasses and Journeys. Always cross-check your vehicle’s OEM part numbers or use the seller’s fitment tool to confirm compatibility.

• Chrysler 200 (2011–2014) 2.4L
• PT Cruiser (2003–2010) 2.4L
• Jeep Compass & Patriot (2011–2017) 2.0L / 2.4L
• Dodge Journey (2011–2020) 2.4L and many Dodge Caravan, Neon, Dart, Avenger, Caliber models
• Various Dodge Ram and Dakota van applications (2001–2003) with 3.9L–5.9L engines

How do upstream and downstream sensors in this set differ and why buy both?

Upstream (pre-catalyst) sensors measure exhaust oxygen to help the engine control module maintain proper fuel mixture. Downstream (post-catalyst) sensors monitor catalytic converter efficiency. Buying both ensures consistent sensor behavior and prevents mismatch-related drivability or diagnostic issues.

• Upstream sensor: direct feedback for fuel trims and ignition control
• Downstream sensor: monitors converter performance and emissions
• Matched set reduces diagnostic confusion and uneven sensor aging
• Sold together to simplify replacement and maintain OEM-like readings

What quality assurances and installation considerations should I know?

Sangyue ships the sensors with a one-year unlimited mileage quality guarantee, offering coverage against manufacturing defects. Installation typically requires typical automotive tools and a sensor socket; observe torque specs and use anti-seize if recommended by your mechanic. If a check-engine light persists after replacement, a full diagnostic scan should be performed.

• One-year unlimited mileage parts guarantee for defects
• Requires oxygen sensor socket or appropriate hand tools
• Verify connector type and wire length before ordering
• Clear codes with a scanner after installation or consult a technician

Will these sensors affect emissions testing or engine performance?

Replacing failed oxygen sensors with properly matched upstream and downstream units helps restore accurate sensor data used by the engine computer. That can reduce incorrect fuel trims and eliminate emissions-related fault codes, which helps your vehicle meet inspection criteria when sensors were the root cause. These parts are designed as replacement components rather than performance upgrades.

• Restores correct oxygen measurement for fuel control
• Can eliminate oxygen-sensor-related diagnostic trouble codes
• Not intended as a performance enhancement; OEM-style replacement
• Helps return systems to expected emissions behavior when sensors were faulty

Who this is for: Drivers and DIY mechanics owning compatible Chrysler, Jeep or Dodge vehicles who need a matched upstream and downstream replacement set. This Sangyue kit is suited for owners replacing failing oxygen sensors to clear emissions-related codes or to restore proper air-fuel monitoring. If you require exact fitment, confirm your vehicle year, engine size and connector type before purchase or consult a professional installer.