2001 Toyota 4Runner Oxygen Sensors & Components
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TRQ®Upstream O2 Oxygen SensorToyota 4Runner 2001, Upstream O2 Oxygen Sensor by TRQ®. TRQ oxygen sensors are manufactured to precise specifications using premium raw materials to optimize your vehicle’s emission system. Each sensor is isostatically-pressed for...Intended to bring your vehicle back to its original gloryBudget-friendly alternative to the OEM part$64.94 - $71.73$66.95 - $73.95Save 3% - TRQ®Oxygen SensorToyota 4Runner 3.4L 2001, Oxygen Sensor by TRQ®. Position: Downstream. If your oxygen sensor fails, replace it with this top-grade part developed to easily fix the problem. Built to fit and function exactly as the part it is replacing,...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$36.81 - $60.09$37.95 - $61.95Save up to 4%
- Denso®Oxygen SensorToyota 4Runner 3.4L 2001, 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...High quality plastic and/or steel constructionDirect replacement for a proper fit every time$53.08
- Bosch®Premium Narrow-band Oxygen SensorToyota 4Runner 3.4L 2001, 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...OE Identical ConnectorCompact Design$61.01
- Spectra Premium®Oxygen SensorToyota 4Runner 3.4L 2001, 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...Increase vehicle fuel economy and engine performance while decreasing vehicle exhaust emissions100% performance tested to meet vehicle requirements$51.35 - $117.19
- Walker Products®Oxygen SensorToyota 4Runner 3.4L 2001, 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...High quality at an affordable priceExpertly made from premium materials$43.86 - $184.39
- Bosch®Narrow-band Oxygen SensorToyota 4Runner 3.4L 2001, 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...OE-EquivalentOE Style connectors and wire lengths$50.66
- NTK®Oxygen SensorToyota 4Runner 3.4L 2001, 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...Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement$54.53
- Walker Products®Premium Oxygen SensorToyota 4Runner 3.4L 2001, Premium Oxygen Sensor by Walker Products®. Position: Downstream. 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$50.04
- Bosch®Premium Wideband Oxygen SensorToyota 4Runner 3.4L 2001, Premium Wideband Oxygen Sensor by Bosch®. Position: Upstream. This sensor utilizes a sophisticated sensing element enabling it to produce a precise output in proportion to the air/fuel ratio. Wideband sensors...Detects the exact amount of unburned fuel in the exhaust streamOE connectors and OE-style harness for continuous wire from connector to sensor$245.73
- Denso®Universal Fit Oxygen SensorToyota 4Runner 3.4L 2001, 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...Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants$46.30
- Delphi®Oxygen SensorToyota 4Runner 2001, 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$104.83 - $196.84
- Original (OEM)Emission Control PartsAlong with power, your engine produces carbon monoxide, oxide of nitrogen, hydrocarbons, and other hazardous gases that cause harm to the environment. To minimize air pollution, all vehicles are equipped with an emission control system...
- Toyota OEEmission System - Emission Components (3.4L)Toyota 4Runner 3.4L 2001, Emission System - Emission Components by Toyota OE. There's no better way to make your Toyota look and perform the way it should than relying on genuine Toyota OE parts. Unlike many aftermarket parts, these are...Genuine Toyota OEM parts designed to fit perfectlyCrafted from high-grade materials to ensure superior quality$7.98 - $403.85
- Denso®Air Fuel Ratio SensorToyota 4Runner 3.4L 2001, 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 to help reduce fuel consumption and harmful emissionsMade with the use of state-of-the-art sensor technologies$177.98
- NTK®Air Fuel Ratio SensorToyota 4Runner 3.4L 2001, Air Fuel Ratio Sensor by NTK®. Position: Upstream. Location: B1S1. Air fuel ratio sensors utilize a sophisticated sensing element that enables them to produce a precise output in proportion to the air fuel...Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement$271.23
- Walker Products®Premium Air Fuel Ratio SensorToyota 4Runner 3.4L 2001, Premium Air Fuel Ratio Sensor by Walker Products®. Position: Upstream. Walker Oxygen Sensors are precision made for outstanding performance and manufactured to meet or exceed all original equipment...Designed to meet or exceed OE specifications in form, fit and functionGlobal coverage for import and/or domestic applications$184.39
- Dorman®Help™ Oxygen Sensor GasketToyota 4Runner 2001, 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$9.61 - $11.35
- ReplacementOxygen SensorToyota 4Runner 3.4L 2001, 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 Replacement...Expertly crafted from premium materialsDesigned to match rigorous quality standards$10.76 - $24.98
- Vemo®Oxygen SensorToyota 4Runner 3.4L 2001, Oxygen Sensor by Vemo®. Position: Rear. Location: In Front of the Catalyst. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...High quality at an affordable priceExpertly made from premium materials$96.55
- Facet®Oxygen SensorToyota 4Runner 3.4L 2001, Oxygen Sensor by Facet®. Position: Driver Side Rear. Location: Post Catalyst. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art...The reliable goods for increase of reliability of the carQuality equal, if not superior, to that of the original components$57.02
- CRS®Air Fuel Ratio SensorToyota 4Runner 3.4L 2001, 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...Compliant with the most strict standards for qualityDesigned to comply with the highest quality standards$38.85 - $92.91
- ReplacementOxygen Sensor SetToyota 4Runner 3.4L 2001, Oxygen Sensor Set 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 Replacement...Expertly crafted from premium materialsDesigned to match rigorous quality standards$31.60 - $49.96
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If you are looking for a 2001 Toyota 4Runner 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 2001 4Runner 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 2001 Toyota 4Runner 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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