Amrxuts Downstream Oxygen Sensor 234-9304 — Direct-Fit Bank 1 Sensor 2, 4-Wire Harness

The Amrxuts 234-9304 downstream oxygen sensor (Bank 1 Sensor 2) is a direct-fit replacement oxygen sensor engineered to restore accurate exhaust monitoring and resolve check-engine light codes for compatible Toyota and Lexus 2.5L vehicles.

This premium aftermarket sensor replaces part numbers 89467-33210, 8946733210, 234-9304 and 2349304 and is built for the 2.5L inline-4 applications found in select 2018–2021 Toyota Camry, 2019–2021 Avalon, and 2019–2020 Lexus ES300h models. It’s a brand-new, tested component supplied with a 16.34-inch wiring harness and a four-wire connector to match factory harnesses and signal requirements. The unit is intended for use as the downstream oxygen sensor (sensor 2) on bank 1—meaning it monitors exhaust gas after the catalytic converter to help the vehicle’s control system verify catalyst efficiency and maintain emissions compliance.

How will installing this downstream oxygen sensor affect my vehicle’s performance?

Replacing a faulty downstream sensor won’t increase horsepower, but it restores correct exhaust monitoring and can stop diagnostic trouble codes and drivability interruptions caused by sensor faults. A working sensor helps the engine control module confirm catalytic converter operation and can prevent rough idling linked to active fault conditions.

• Direct-fit replacement—connects to factory wiring without splicing.
• Four-wire design ensures proper signal and heater circuit function.
• Tested before shipping to reduce early failures and installation headaches.
• Helps the vehicle’s diagnostics achieve accurate emissions monitoring.

Will this sensor fit my exact Toyota or Lexus model?

Fitment covers specific 2.5L engine codes and trim levels; confirm compatibility by matching part numbers and engine codes before buying. The product fits many 2018–2021 Toyota Camry models, 2019–2021 Avalon trims, and 2019–2020 Lexus ES300h models that use the A25A-series 2.5L engines and the listed OEM part numbers.

• Compatible OEM numbers: 89467-33210, 8946733210, 234-9304, 2349304.
• Designed for A25A-series 2.5L engines in Camry, Avalon, and ES300h models.
• Check your vehicle’s engine code (A25AFKS, A25AFXS, AXZH10, etc.) to confirm fit.
• Direct fit for specified trims: LE, SE, XLE, XSE, Limited, and related grades.

How difficult is installation and what should I expect?

The sensor is a bolt-in replacement that uses the factory connector for a straightforward install; most mechanically inclined owners can do the swap with basic hand tools. Observe torque specs for the sensor, and allow the exhaust to cool before removal to avoid burns. If you prefer, a qualified technician can complete the job quickly.

• Wire length: 16.34 inches—sufficient for factory routing without stretching.
• Wire count: 4 (heater and signal circuits) for direct compatibility.
• Installation requires common tools and anti-seize on threads if desired.
• Recommended: clear codes with a scanner after replacement to verify resolution.

What quality and warranty assurances come with this Amrxuts sensor?

The sensor is supplied as a brand-new aftermarket part and is 100% tested prior to shipment to ensure operational stability. Amrxuts provides a one-year guarantee against manufacturing defects; contact customer service for replacement within that period if problems arise.

• Factory-style four-wire construction and matched connector for reliable signals.
• Pre-shipment testing reduces early-life failures.
• One-year replacement guarantee for manufacturing defects.
• Part number cross-reference included for easy verification.

Who is this for: This Amrxuts downstream oxygen sensor is intended for owners and technicians replacing a failed bank 1 sensor 2 on compatible Toyota Camry, Avalon, and Lexus ES300h 2.5L vehicles. It’s a practical option for drivers addressing check-engine light codes related to O2 sensor or catalyst monitoring, fleet managers needing cost-effective OE-style replacements, and DIY mechanics who want a tested, direct-fit sensor with clear part-number compatibility.