O2 Oxygen Sensor Upstream Downstream for Toyota Camry (2004-2011) 2.4L

Direct-Fit Replacement Upstream & Downstream O2 Sensor Kit for 2004-2011 Toyota Camry (XV30 / XV40)

What it Does: The O2 Oxygen Sensor Kit monitors exhaust gas stoichiometry on the 2004-2011 Toyota Camry 2.4L to restore factory closed-loop fuel management, optimize engine efficiency, and clear emissions-related check engine lights.

The Stock Toyota Camry Sensor Degradation

Over extended operating cycles, factory oxygen sensors on the 2AZ-FE engine suffer internal contamination from blow-by vapors, unburnt hydrocarbons, and continuous exhaust thermal cycling upwards of 1,400°F. The internal planar zirconia substrate develops slow response latency or complete heater circuit failure, triggering diagnostic trouble codes such as P0135, P0141, and P0420. This degradation corrupts the ECU's short-term fuel trim calculations, resulting in excessive fuel consumption, erratic idle, reduced power output, and accelerated catalytic converter deterioration.

The Engineering Solution

This upstream and downstream sensor kit replaces worn factory monitoring units with OE-grade planar sensing elements. The upstream wideband air-fuel ratio sensor (234-9049) delivers high-speed microampere signal resolution across transient throttle inputs, enabling precise 14.7:1 air-fuel target tracking. Paired with the downstream monitoring sensor (234-4622), both units feature dual-layer 304 stainless steel protection shields, laser-welded sensor bodies, fluoropolymer-insulated lead wires, and factory-pinned weather-pack terminal connectors for a true plug-and-play installation without wire splicing.

What's Included

• 1x Upstream Air Fuel Ratio Sensor (Replaces 234-9049)
• 1x Downstream Oxygen Sensor (Replaces 234-4622)

Technical Specifications

Compatibility

• 2004-2011 Toyota Camry 2.4L L4 (Base, LE, SE, XLE models equipped with the 2.4L engine)

Frequently Asked Questions & Fitment Warnings

Does this fit the XV30 and XV40 Camry?

Yes, this is a direct fit for the 2004-2011 Toyota Camry equipped with the 2AZ-FE 2.4L engine. Does not fit V6 models (3.0L, 3.3L, 3.5L) or later 2.5L 2AR-FE engines; verify your engine displacement before ordering.

Do these sensors require wire splicing during installation?

No, both sensors feature vehicle-specific OE terminal connectors and matching harness lengths for direct plug-and-play installation.

The Toyota Reliability Standard

Engineered to withstand rigorous daily driving conditions, these sensors maintain precise air-fuel monitoring to preserve catalytic efficiency, engine responsiveness, and dependable four-cylinder performance.