Oxygen Sensors for Toyota Tacoma (2005-2008) 4.0L Upstream & Downstream
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Direct-Fit Complete Oxygen Sensor Kit for 2005-2008 Toyota Tacoma (N200)
What it Does: The complete 4-piece oxygen sensor kit replaces degraded factory upstream and downstream sensors on the 2005-2008 Toyota Tacoma to restore precise closed-loop fuel trims and eliminate diagnostic trouble codes.
The Stock Toyota Tacoma Exhaust Gas Sensing Degradation
Over extended operating cycles, factory zirconia oxygen and wideband air-fuel ratio sensors in the 1GR-FE exhaust stream suffer from thermal fatigue, silicone contamination, and soot accumulation. As internal platinum electrodes degrade, sensor latency increases, shifting engine feedback loops rich or lean. This thermal aging leads to sluggish stoichiometric corrections, unmetered over-fueling, rough idle, failed smog inspections, and persistent DTCs such as P0130 through P0161 or false catalytic degradation codes like P0420 and P0430.
The Engineering Solution
Engineered to exact OEM specifications, this complete set features planar ceramic elements with integrated heaters for rapid light-off and stable closed-loop transition. Dual-layer laser-welded stainless steel bodies shield internal sensing ceramics from thermal shock and high exhaust velocities. Factory-length, high-temperature wire harnesses and pre-pinned OEM weather-pack connectors eliminate wire splicing, maintaining factory signal resistance without voltage drop across both cylinder banks.
What's Included
- 2 x Upstream Air-Fuel Ratio (Oxygen) Sensors
- 2 x Downstream Oxygen Sensors
Technical Specifications
| Fitment | 2005-2008 Toyota Tacoma |
|---|---|
| Engine / Chassis | 1GR-FE (4.0L V6) / N200 |
| Stock Output | 236 hp / 266 lb-ft |
| Replaces OEM Part # | 234-9026, 234-4260, 89465-04300, 89465-04320 |
Compatibility
- 2005-2008 Toyota Tacoma 4.0L V6 (All Trims: Base, PreRunner, X-Runner)
Frequently Asked Questions & Fitment Warnings
Does this fit the N200 Tacoma?
Yes, this is a direct fit for the 2005-2008 Toyota Tacoma equipped with the 1GR-FE 4.0L V6 engine.
Should anti-seize be applied during installation?
Apply anti-seize exclusively to the outer threads, ensuring compound does not touch the perforated sensor tip or contaminate the ceramic element.
The Toyota Caliber
Maintain critical towing reliability and long-distance payload efficiency by keeping stoichiometric fuel control precise across all duty cycles and extreme thermal swings.
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