2003 Toyota Sienna Oxygen Sensors & Components
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Denso®Oxygen SensorToyota Sienna 2003, Oxygen Sensor by Denso®. Position: Downstream. Make sure your engine runs efficiently and produces fewer emissions by replacing your malfunctioning fuel-ratio sensors with these top-notch products designed by Denso....High quality plastic and/or steel constructionDirect replacement for a proper fit every time$62.93 - Walker Products®Oxygen SensorToyota Sienna 2003, Oxygen Sensor by Walker Products®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...High quality at an affordable priceExpertly made from premium materials$44.79 - $215.77
- Denso®Air Fuel Ratio SensorToyota Sienna 2003, Air Fuel Ratio Sensor by Denso®. Position: Upstream. Make sure your engine runs efficiently and produces fewer emissions by replacing your malfunctioning fuel-ratio sensors with these top-notch products designed by...Designed to help reduce fuel consumption and harmful emissionsMade with the use of state-of-the-art sensor technologies$158.87
- Bosch®Premium Narrow-band Oxygen SensorToyota Sienna 2003, Premium Narrow-band Oxygen Sensor by Bosch®. Position: Downstream. A worn-out oxygen sensor can cause engine performance problems and shorten the life of the catalytic converter. Tune-up your vehicle with an Oxygen...OE Identical ConnectorCompact Design$67.33
- Bosch®Narrow-band Oxygen SensorToyota Sienna 2003, Narrow-band Oxygen Sensor by Bosch®. Position: Downstream. The Bosch oxygen sensor utilizes a mix of zirconium and yttrium oxides and other elements to form a tough base that withstands the intense stress to which...OE-EquivalentOE Style connectors and wire lengths$55.94
- NTK®Oxygen SensorToyota Sienna 2003, Oxygen Sensor by NTK®. Position: Downstream. Location: B1S2. Thimble type sensors feature a ceramic element that projects into the exhaust system and becomes electrically conductive at high temperature. The sensor...Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement$56.13
- Bosch®Premium Wideband Oxygen SensorToyota Sienna 2003, Premium Wideband Oxygen Sensor by Bosch®. This sensor utilizes a sophisticated sensing element enabling it to produce a precise output in proportion to the air/fuel ratio. Wideband sensors use a more sophisticated...Detects the exact amount of unburned fuel in the exhaust streamOE connectors and OE-style harness for continuous wire from connector to sensor$271.35
- Denso®Universal Fit Oxygen SensorToyota Sienna 2003, Universal Fit Oxygen Sensor by Denso®. Position: Downstream. Denso's light duty oxygen sensor started to appear on vehicles with the development of fuel injection systems. The basic job of the sensor is to monitor...Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants$59.81
- Walker Products®Premium Air Fuel Ratio SensorToyota Sienna 2003, Premium Air Fuel Ratio Sensor by Walker Products®. Walker Oxygen Sensors are precision made for outstanding performance and manufactured to meet or exceed all original equipment specifications and test requirements....Designed to meet or exceed OE specifications in form, fit and functionGlobal coverage for import and/or domestic applications$184.42 - $185.60
- Delphi®Oxygen SensorToyota Sienna 2003, Oxygen Sensor by Delphi®. As one of the leading suppliers of oxygen sensor technology since 1978, Delphi planar technology is the result of their OE and aftermarket engineers partnering together to develop the most...Resists high temperatures, vibration damage and wire corrosion to protect signal accuracy, and long lifePatented sensors construction and design$92.44 - $196.84
- Dorman®Help™ Oxygen Sensor GasketToyota Sienna 2003, Help™ Oxygen Sensor Gasket by Dorman®. Easily and affordably restore the engine to safe, proper functioning with Dorman's Oxygen Sensor Gasket. It s sold separately, enabling you to replace only the failed...Resilient against fluctuations in under hood temperaturesHigh heat resistance$4.20
- Dorman®OE Solutions™ Oxygen Sensor Bung Repair KitOE Solutions™ Oxygen Sensor Bung Repair Kit by Dorman®. Why replace an exhaust pipe because of a corroded, stripped or damaged oxygen sensor bung? Save the pipe and replace the bung with this weld-on replacement. Standard O2 sensor...Repair-friendly solution - this oxygen sensor bung allows replacement of a damaged fitting without replacing the entire exhaust componentUniversal fitment - designed to accommodate standard oxygen sensor threads$9.63 - $11.08
- Dorman®OE Solutions™ Oxygen Sensor Bung Repair KitOE Solutions™ Oxygen Sensor Bung Repair Kit by Dorman®. Why replace an exhaust pipe because of a corroded, stripped or damaged oxygen sensor bung? Save the pipe and replace the bung with this weld-on replacement. Standard O2 sensor...Repair-friendly solution - this oxygen sensor bung allows replacement of a damaged fitting without replacing the entire exhaust componentUniversal fitment - designed to accommodate standard oxygen sensor threads$9.61 - $11.35
- Spectra Premium®Oxygen SensorToyota Sienna 2003, Oxygen Sensor by Spectra Premium®. To ensure your vehicle has optimal performance and fuel economy while producing minimal emissions replace a defective O2 sensor with one backed by the aftermarket’s most rigorous...Increase vehicle fuel economy and engine performance while decreasing vehicle exhaust emissions100% performance tested to meet vehicle requirements$19.32 - $99.63
- NTK®Air Fuel Ratio SensorToyota Sienna 2003, Air Fuel Ratio Sensor by NTK®. Air fuel ratio sensors utilize a sophisticated sensing element that enables them to produce a precise output in proportion to the air fuel ratio. AFR sensors provide the ECU with an...Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement$218.05 - $225.72
- Walker Products®Premium Oxygen SensorToyota Sienna 2003, Premium Oxygen Sensor by Walker Products®. Position: Downstream Front. Walker Oxygen Sensors are precision made for outstanding performance and manufactured to meet or exceed all original equipment specifications and...Improved Engine Response & PerformanceLower Emissions$50.97
- Aceon®Oxygen SensorToyota Sienna 2003, Oxygen Sensor by Aceon®. Position: Downstream Front. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...Made with precision and quality in mindDesigned to meet your specific needs$24.12
- CRS®Air Fuel Ratio SensorToyota Sienna 2003, Air Fuel Ratio Sensor by CRS®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Compliant with the most strict standards for qualityDesigned to comply with the highest quality standards$39.54 - $92.91
- ReplacementOxygen SensorToyota Sienna CE / LE / XLE 2003, Oxygen Sensor by Replacement. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by...Expertly crafted from premium materialsDesigned to match rigorous quality standardsCall for Pricing
- Herko®Oxygen SensorToyota Sienna 2003, Oxygen Sensor by Herko®. Designed as a direct-fit replacement of your worn-out or malfunctioning part, it will provide easy, no-hassle installation and help restore proper fuel system functionality needed to keep...Will help optimize your vehicle’s performance and fuel efficiencyBuilt using high-grade materials for ultimate quality and durability$25.75 - $46.86
- TruParts®Oxygen SensorToyota Sienna 2003, Oxygen Sensor by TruParts®. Position: Downstream Front. Go with this high-quality product to restore your vehicle’s lost power and bring it back to its optimal condition. Made from the finest materials in...Made utilizing the finest materials and equipmentEngineered to restore your vehicle to its pristine condition$51.36
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If you are looking for a 2003 Toyota Sienna oxygen sensor, don't go any further! At our store, we carry a wide array of oxygen sensors from such world-renowned manufacturers as Denso, Bosch, Spectra Premium, Dorman, and many others. All oxygen sensors you'll find on this page feature direct OE connectors and can be installed on your 2003 Sienna without any additional modifications. We also offer a variety of related products, namely wire extension harnesses, gaskets, and fittings. Choose products you need and let your Toyota operate at its peak!
So, why are oxygen sensors that important? Often referred to as O2 sensors or lambda sensors, oxygen sensors provide the engine management system with accurate inputs about how fuel mixture is burning. Using this data, vehicle's ECU can regulate air/fuel mixture. Primary 2003 Toyota Sienna oxygen sensor measures the content of oxygen in exhaust gases, and secondary O2 sensors monitor the operation of a catalytic converter. If any of these O2 sensors fails, ECU can no longer get correct signal outputs for the proper air to fuel ratio, which can result in poor engine performance and decreased gas mileage.
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