20 Best Denso 234-9021 Oxygen Sensor in 2024 Reviews and Buying Guide

1,497 Reviews Scanned

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1 Denso 234-9021 Upstream Heated Oxygen Sensor with 4-Wire Plug and 14.17†Harness Denso 234-9021 Upstream Heated Oxygen Sensor with 4-Wire Plug and 14.17†Harness
2 Oxygen O2 Sensor Upstream 234-9021 Compatible With Toyota Avalon 3.0L 2000-2004 Sienna Solara 3.0L... Oxygen O2 Sensor Upstream 234-9021 Compatible With Toyota Avalon 3.0L 2000-2004 Sienna Solara... No ratings yet
3 Oxygen O2 Sensor Upstream 234-9021 Compatible with Lexus Es300 3.0L 2001-2002 Toyota Avalon Camry... Oxygen O2 Sensor Upstream 234-9021 Compatible with Lexus Es300 3.0L 2001-2002 Toyota Avalon Camry... No ratings yet
4 Replacement Oxygen Sensor Upstream - Replaces 234-9021, 8946741030, 8946741040 - Compatible with... Replacement Oxygen Sensor Upstream - Replaces 234-9021, 8946741030, 8946741040 - Compatible with... No ratings yet
5 Denso 234-4988 Oxygen Sensor (; 4 Wire, Direct Fit, Heated, Wire Length: 9.53; Oe Style Style), 1... Denso 234-4988 Oxygen Sensor (; 4 Wire, Direct Fit, Heated, Wire Length: 9.53; Oe Style Style), 1... No ratings yet
6 DrCax 234-9021 Oxygen O2 Sensor Upstream Heated Air Fuel Ratio Compatible with Toyota Avalon... DrCax 234-9021 Oxygen O2 Sensor Upstream Heated Air Fuel Ratio Compatible with Toyota Avalon... No ratings yet
7 Denso 234-4138 Oxygen Sensor Denso 234-4138 Oxygen Sensor
8 Denso 234-9005 Oxygen Sensor Denso 234-9005 Oxygen Sensor
9 Denso Oxygen Sensor - 234-4524 Denso Oxygen Sensor - 234-4524 No ratings yet
10 Maxfavor 1Pc Air Fuel Ratio Upstream O2 Sensor Oxygen Sensor Replacment For 2004 2003 2002 2001 2000... Maxfavor 1Pc Air Fuel Ratio Upstream O2 Sensor Oxygen Sensor Replacment For 2004 2003 2002 2001... No ratings yet
11 Denso 234-4908 Oxygen Sensor Denso 234-4908 Oxygen Sensor No ratings yet
12 Denso 234-5053 Oxygen Sensor (Air and Fuel Ratio Sensor) Denso 234-5053 Oxygen Sensor (Air and Fuel Ratio Sensor) No ratings yet
13 Denso 234-4797 Oxygen Sensor Denso 234-4797 Oxygen Sensor No ratings yet
14 Denso 234-9131 Oxygen Sensor Denso 234-9131 Oxygen Sensor No ratings yet
15 Automotive-leader 234-9304 Downstream Oxygen O2 Sensor Replacement for Toyota 2018-2020 Camry... Automotive-leader 234-9304 Downstream Oxygen O2 Sensor Replacement for Toyota 2018-2020 Camry...
16 Denso 234-9009 Oxygen Sensor , Grey Denso 234-9009 Oxygen Sensor , Grey
17 Denso 234-4015 Oxygen Sensor Denso 234-4015 Oxygen Sensor No ratings yet
18 Denso 234-4161 Oxygen Sensor with 15.35” 4-Wire Harness Denso 234-4161 Oxygen Sensor with 15.35” 4-Wire Harness No ratings yet
19 Denso 234-4624 Upstream Heated Oxygen Sensor for Toyota/Lexus with 16” Wire and 4-Prong Plug, 0.26... Denso 234-4624 Upstream Heated Oxygen Sensor for Toyota/Lexus with 16” Wire and 4-Prong Plug,...
20 Denso 234-4906 Oxygen Sensor Denso 234-4906 Oxygen Sensor

SaleBestseller No. 1
Denso 234-9021 Upstream Heated Oxygen Sensor with 4-Wire Plug and 14.17†Harness
  • Manufactured to detect the amount of exhaust gas air fuel ratio
  • Constructed from durable material
  • Features zirconia solid electrolyte
  • Highly accurate
  • Easy installation
Bestseller No. 2
Oxygen O2 Sensor Upstream 234-9021 Compatible With Toyota Avalon 3.0L 2000-2004 Sienna Solara 3.0L...
  • Part Number Fitment: 234-9021, 2349021, 8946741030, 89467-41030, 89467-41040, 8946741040, 8946733030, 89467-33030, 5S3572, OS1499, SG745, SG779,...
  • Please confirm your car model and the OE of the part before purchasing to avoid buying the wrong.
  • Please confirm your part picture before purchasing to avoid buying the wrong.
  • It could correctly replace the original part.
  • Thank you!
Bestseller No. 3
Oxygen O2 Sensor Upstream 234-9021 Compatible with Lexus Es300 3.0L 2001-2002 Toyota Avalon Camry...
  • 234-9021.
  • Easy Installation.
  • Fitment Info In The Product description.
  • Thank you!
  • If you have any questions, please tell us .
Bestseller No. 4
Replacement Oxygen Sensor Upstream - Replaces 234-9021, 8946741030, 8946741040 - Compatible with...
  • Replacement Upstream Oxygen Sensor - Sometimes referred to as O2 or Lambda Sensor measures the amount or proportion of oxygen mixed in the fuel of...
  • Compatible Replacement for Toyota Vehicles - 2000-2001 ES300 3.0L | 2000-2004 Avalon 3.0L | 2001 Camry 3.0L | 2001-2003 Sienna 3.0L | 2001-2003 Solara...
  • Replaces Part# 234-9021, 8946741030, 8946741040, 8946733030, 5S3572 ​usually found on popular Avalon, Camry, and Sienna including year models 00,...
  • OEM Fit, Quality, Finish - This replacement 02 Oxygen Sensor is a direct replacement for the Oxygen Sensor part# 234-9021 and will fit, work and...
  • Lifetime Warranty - This replacement Oxygen Sensor from AA Ignition comes complete with a lifetime warranty. If the part ever fails on your ES300,...
SaleBestseller No. 5
Denso 234-4988 Oxygen Sensor (; 4 Wire, Direct Fit, Heated, Wire Length: 9.53; Oe Style Style), 1...
  • Authentic Product
  • Denso Auto Parts Brand
  • Individual Pack
  • Denso Auto Parts Part #234-4988
  • Brand new, never used.
Bestseller No. 6
DrCax 234-9021 Oxygen O2 Sensor Upstream Heated Air Fuel Ratio Compatible with Toyota Avalon...
  • [PRECAUTIONS PURCHASE]: Please use Amazon's Your Garage function and verify the fitment of the autopart by the year/make/model of your vehicle and the...
  • [SOLUTION]: Improve engine efficiency performance and fuel economy.Reduce CO2 and other harmful emission.
  • [OE STANDARD]: All of the DrCax oxygen sensors are built to achieve or exceed OE specifications, subject to strict quality control testing. Every...
  • [REPLACEMENT PART NUMBER]:234-9021, 89467-33030, 89467-41030, 89467-41040, 89467-42020, 8946733030, 8946741030, 8946741040, 2131483, 25054003,...
  • [BUY WITH CONFIDENCE]: DrCax oxygen sensors comes complete with a One year warranty.If the sensor ever fails on your car,simply contact us for a...
SaleBestseller No. 7
Denso 234-4138 Oxygen Sensor
  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation
SaleBestseller No. 8
Denso 234-9005 Oxygen Sensor
  • Efficient Fuel Consumption
  • Highly accurate
  • Easy installation
  • Constructed from durable material
  • Fitment Details: Acura - RSX 2002-2004; Honda - Civic 2001-2005, CR-V 2002-2004
SaleBestseller No. 9
Denso Oxygen Sensor - 234-4524
  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation
Bestseller No. 10
Maxfavor 1Pc Air Fuel Ratio Upstream O2 Sensor Oxygen Sensor Replacment For 2004 2003 2002 2001 2000...
  • 🔧【Applications】OE# 234-9021 683 SG745 SG779 Upstream Oxygen Sensor Replacement for Toyota 2004-2000 Avalon,2001 Camry Auto Trans,2003-2001...
  • 🔧【Advantage】Made of high-quality materials,strong durability,to ensure service life,oxygen sensor can improve engine performance and fuel...
  • 🔧【Cautions】Pls carefully check your vehicle year & make & model with the fitment of Amazon and our description.Pls compare your part with our...
  • 🔧【Installation】STEP1. Locate the oxygen sensor position and remove it with socket, STEP2. Compare the new sensor to the old sensor to ensure a...
  • 🔧【Warranty】1-Year Unlimited Miles Warranty. If the oxygen sensor does not fit your vehicle, we accept return. Please make the item clean and...
SaleBestseller No. 11
Denso 234-4908 Oxygen Sensor
  • Most orders leave warehouse same day
  • Package Dimensions: 4.9 L x 15.7 H x 5.8 W (centimeters)
  • Country of Origin : Japan
  • Package Weight : 0.134 kilograms
SaleBestseller No. 12
Denso 234-5053 Oxygen Sensor (Air and Fuel Ratio Sensor)
  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation
SaleBestseller No. 13
Denso 234-4797 Oxygen Sensor
  • Efficient Fuel Consumption
  • Easy installation
  • Constructed from high quality material
  • Manufactured with precision to meet OE standards
  • Fit type: Vehicle Specific
SaleBestseller No. 14
Denso 234-9131 Oxygen Sensor
  • Many products require vehicle-specific fitment
  • View the Compatibility table to ensure the part fits your year, make, model and submodel
  • Please reference the submodel information located on the far left within the Compatibility table under "Notes"
  • Please note: Due to our high sales volume, it may take up to 2-business days for us to reply to all questions and/or requests.
  • We do not offer shipping to APO/FPO
SaleBestseller No. 15
Automotive-leader 234-9304 Downstream Oxygen O2 Sensor Replacement for Toyota 2018-2020 Camry...
  • 【Warranty】2 Years. (Improve fuel efficiency & Stable performance & Durable)
  • 【Placement on Vehicle】▲Rear, Lower, Downstream ▲Wire Quantity : 4 Wires ▲Wire Harness Length : 16.34 (IN) ▲Sensor Type : Heated
  • 【Direct Fit Application】234-9304 o2 sensor bank 1 sensor 2 replacement for 2019-2021 Toyota Avalon 2.5L-l4, for 2018-2020 Toyota Camry 2.5L-l4,...
  • 【Interchange Part Number】234-9304, 2349304, 234 9304, 89467-33210, 8946733210, 89467 33210
  • 【Service Guaranteed】Must pass a rigorous professional practice loading test before sale and shipment. 1 0 0 % satisfaction after sale services and...
SaleBestseller No. 16
Denso 234-9009 Oxygen Sensor , Grey
  • Manufactured to detect the amount of exhaust gas air fuel ratio
  • Constructed from durable material
  • Features zirconia solid electrolyte
  • Highly accurate and easy installation
  • Special Shipping Information: This item cannot be returned and has additional shipping restrictions
SaleBestseller No. 17
Denso 234-4015 Oxygen Sensor
  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation
SaleBestseller No. 18
Denso 234-4161 Oxygen Sensor with 15.35” 4-Wire Harness
  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation, Wiring Harness Overall Length (in): 15.35
Bestseller No. 19
Denso 234-4624 Upstream Heated Oxygen Sensor for Toyota/Lexus with 16” Wire and 4-Prong Plug, 0.26...
  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation ; Denso 234-4624 Oxygen Sensor – may not fit all Calif. applications, please double check fitment details.
SaleBestseller No. 20
Denso 234-4906 Oxygen Sensor
  • Package Dimensions: 4.9 L x 5.5 W x 15.1 H (centimetres)
  • Fits multiple makes and models (contact with your vehicle for fitment compatibility information)
  • Country of Origin : Japan
  • Package Weight: 0.112 kilograms
.