DriveFix Upstream & Downstream Oxygen Sensor Set — 4-Piece Kit, Direct-Fit for Lexus & Toyota, Restores Accurate Air-Fuel

DriveFix upstream and downstream oxygen sensor set replaces worn O2 sensors on compatible Lexus and Toyota V6 and V8 engines to restore accurate air-fuel readings and check-engine illumination.

This four-piece sensor kit contains matching upstream (pre-catalytic) and downstream (post-catalytic) oxygen sensors engineered to fit a wide range of Lexus and Toyota models from the early 2000s through the mid-2010s. Each sensor is built to the vehicle-specific electrical and thread specifications listed below, so you can replace failing sensors without modifying wiring or mounts. The set is ideal when you need multiple sensors replaced at once for diagnostic repairs or preventative maintenance.

Which Lexus and Toyota models does this sensor set fit?

The DriveFix set covers many Lexus ES, GX, LX and Toyota 4Runner, Avalon, Camry, FJ Cruiser, Land Cruiser, Sequoia, Solara, Tacoma, Tundra and Venza applications across specific model years and engine sizes. Compatibility depends on engine displacement and sensor bank position (upstream/downstream and left/right).

• Common Lexus fits: ES350 (2007–2014), GX460/GX470 (2003–2013 variants), LX470/LX570 (2005–2013).
• Common Toyota fits: 4Runner (2001–2012 variants), Camry (2002–2014 variants), Tacoma/Tundra (2005–2015 variants), plus Avalon, FJ Cruiser, Land Cruiser, Sequoia, Solara, Venza.
• See parts list for exact year, engine, and bank location matches before ordering.

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

Upstream sensors sit before the catalytic converter and monitor exhaust oxygen to help the engine computer tune air-fuel mixture; downstream sensors sit after the catalyst to monitor converter efficiency. Replacing both ensures the engine management system receives correct inputs and helps avoid misleading fault codes.

• Upstream: fast-response zirconia design for accurate air-fuel feedback.
• Downstream: stable sensing to verify catalytic performance.
• Complete set eliminates mismatched aging between pre- and post-catalyst readings.

Are these DriveFix sensors easy to install and what comes in the package?

The sensors are direct-replacement units made to match OEM threads, lengths and connector types for the listed vehicles—no splicing or adapters required in most cases. Installation typically requires an O2 sensor socket and standard hand tools; always disconnect the battery and allow the exhaust to cool before beginning.

• Package includes: 2x upstream O2 sensors and 2x downstream O2 sensors.
• Compatible with many OEM part numbers such as 89465-04270 and 234-4138—see full replace list.
• Installation tip: anti-seize compound may be pre-applied or supplied; follow included instructions.

Will these sensors clear a check engine light and improve drivability?

Replacing failed oxygen sensors often resolves O2-related fault codes and can restore correct fuel trim readings, which may reduce rough idling and poor fuel economy. However, if the catalytic converter or wiring is damaged, additional repairs might be necessary.

• Restores accurate oxygen readings for fuel management systems.
• Can clear codes when the sensors are the root cause (scan and confirm).
• If issues persist, inspect wiring, connectors, and the catalytic converter.

Who is this for: The DriveFix upstream and downstream oxygen sensor set is designed for DIY mechanics and professional technicians working on Lexus and Toyota V6/V8 models listed in the compatibility section. Choose this set when you need vehicle-specific, ready-to-install O2 sensors for multi-sensor replacements, diagnostic repairs, or to preempt performance issues tied to aging sensors. Always verify fit by year, engine, and bank location before purchase to ensure a correct match for your vehicle.