BLPextrm Oxygen O2 Sensor Kit for Dodge Charger & Challenger 2006-2020 — Upstream & Downstream Pair, Stainless Steel

If your vehicle is running rough, showing a check engine light, or failing emissions checks, faulty oxygen sensors are a common cause. This BLPextrm two-sensor kit includes both upstream (pre-catalytic converter) and downstream (post-catalytic converter) O2 sensors designed to match many Chrysler, Dodge, Jeep, Ram and related applications from model years 2004–2020. Built with a stainless steel shell, aluminum oxide trap layer and pre-coated threads, these sensors convert exhaust oxygen levels into voltage signals that the engine control unit uses for closed-loop fuel trim adjustments.

Which vehicles and engines are these sensors compatible with?

These oxygen sensors are matched to a long list of Chrysler-family vehicles and engine sizes, covering common model years and V6/V8 displacements. Compatibility depends on exact model year, engine code and original part number, so confirm fitment against your vehicle’s VIN or original sensor part number before ordering.

• Common fits: Dodge Charger/Challenger (3.6L, 5.7L, 6.4L), Chrysler 200/300, Pacifica, Town & Country, Durango, Grand Caravan
• Jeep models: Grand Cherokee and Wrangler with 3.6L and certain 5.7L engines
• Ram trucks: 1500 and 2500 with applicable 5.7L and 6.4L engines
• Check replacements: includes cross-reference numbers like 56029084AA, 234-4587, 234-4593 and more

How do upstream and downstream sensors differ and why replace both?

The upstream sensor measures fresh exhaust before the catalytic converter and guides fuel mixture; the downstream sensor verifies catalytic converter efficiency after the catalyst. Replacing both ensures accurate engine control and correct emissions readings, especially if one sensor failure has masked wear in the other.

• Upstream: primary source for fuel trim adjustments and immediate engine response
• Downstream: monitors converter performance and helps detect catalyst issues
• Replace in pairs when multiple codes or long service intervals exist
• Includes wiring and connector compatibility for OEM-style installs

What construction and performance features does this BLPextrm kit offer?

BLPextrm sensors use a stainless steel housing and an aluminum oxide capture (trap) layer protecting the platinum electrode, plus pre-coated threads for a reliable seal. Those design choices aim to improve signal stability, reduce idle instability and support smoother throttle response when the sensors are functioning correctly.

• Stainless steel shell resists corrosion in exhaust environments
• Trap layer shields the electrode from contamination
• Pre-coated threads simplify sealing and reduce leak risk
• Sold as a two-piece set: upstream and downstream units

Who is this for? This BLPextrm O2 sensor pair is for DIY mechanics and professional technicians working on mid-2000s through late-2010s Chrysler-family vehicles who need a direct-replacement upstream and downstream sensor set. It’s suitable for owners troubleshooting emissions codes, restoring factory-like fuel control, or replacing sensors as part of routine exhaust and emissions maintenance. Always confirm year, engine size and part number compatibility before purchase.